Crossover Health @ Mathilda

(408) 665-3728

323 Soquel Way Sunnyvale, CA 94085

Hours: Mon-Fri 8am to 5pm

Practice walk-through

Your team at Mathilda.

When you start down the path to health and wellness, it’s great to know your team will be with you all the way providing expert knowledge, timely motivation, and even a little inspiration. We share a passionate belief in the power of relationships and look forward to meeting you!

Saba Haq, MD

Primary Care

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Healthcare has been in Saba’s blood since her youth. Her parents’ involvement in the oil industry took her around the world for the first 13 years of her life. She spent her wonder years in Southeast Asia and had a chance to see first hand the global need for quality healthcare. She returned with her family to Southern California during her high school years and began her career journey to become the first physician in her family.


Saba attended medical school at UCLA and completed her residency in Emergency Medicine at UC Davis.
She has spent the last 18 years juggling a busy career and raising her children. Saba enjoys staying active with her family. Reading science fiction and playing the guitar are two of her favorite “me time” activities. She lives with her husband and kids in the heart of the Silicon Valley.


Calvin Ly, DO, MBA

Primary Care

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Calvin is a diligent and ambitious individual who strives for quality and excellence; his goal is to deliver quality care to patients. He was valedictorian at Grace Davis high school, graduated with honors at UCSD in Biochemistry and earned the highest distinction of Summa Cum Laude at the Kansas City University of Medicine and Biosciences. Calvin earned his MBA in Health Care Leadership while attending medical school; his class was the second graduating class to take advantage of this dual degree program. His first career after Emergency Medicine training at Case Western Reserve University was with Kaiser in the Emergency Department in the Los Angeles and Orange County regions. He then transferred up to Northern California to take on a new leadership role managing the Cowell Health Center located at Santa Clara University. He honed his communication educational and management skills working with physician assistants, nurse practitioners, registered nurses and medical assistants, while developing memorable memories and rapport with the students at SCU. While working at Santa Clara University, Calvin kept up his emergency skillset by commuting up to San Francisco, working in the Emergency Department at the California Pacific Medical Center (both Davies and St. Luke’s Campuses) and at Chinese Hospital. He applied the Spanish he learned in high school and college and the Cantonese he learned as a child. He believes excellent communication skills are critical and crucial in delivering quality medical care to patients.

Calvin was born and raised in the Central Valley region of California. He is the second child of four children. His parents owned a computer business assembling custom designed desktops to clients, which included the Stanislaus Unified School District. He is the first generation in his family to obtain a four-year college degree. He is the first physician in the family. During his spare time, Calvin loves to be active: run, bike, hike, swim and play tennis and golf. During his down time, Calvin likes to read and watch comedies. Recently, he has been anticipating the new seasons of West World and the Game of Thrones.


Kristin Hudachek, MD, FAAD


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Kristin enjoys talking about and taking care of skin. She is a board-certified dermatologist from the East Coast who now loves the Bay Area. She received a bachelor’s degree in chemical engineering from Princeton University and a medical degree from the University of Pennsylvania. She completed her medical training in Philadelphia, with a transitional year internship at Albert Einstein Medical Center and a dermatology residency at Drexel University College of Medicine/Hahnemann University Hospital. In Northern California, Kristin has worked as a dermatologist at Kaiser and at a private practice office. Outside of work, she enjoys hiking (with sunscreen, of course!), spinning, and finding the perfect falafel with her husband.


Leslie Luff, BSN, RN

Practice Manager

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Leslie is an experienced Registered Nurse with over 20 years of health care delivery experience. She began her career at Stanford Hospital where she worked as a staff nurse, clinical nurse specialist, physician liaison, and PACU nurse. She later gained experience in several specialities including cardiology, orthopedic spine, gastroenterology, internal medicine, and ambulatory surgery. Leslie brings her love of serving and caring for others to her role as the practice manager, responsible for the day-to-day clinical management of the health center. She will help ensure your visit to the health center combines the highest quality of care with an exceptional experience.


Leslie is a California girl who was born in Malibu and raised in Menlo Park where she still resides today. She finds great satisfaction in working with people to help them reach their full potential. She is an active mom who enjoys baking, pilates, tennis, and is a huge football and baseball fan! She can often be found helping with her daughter’s crew team or trying to keep up with her son on a dirt bike.


Tanya Cook-Riley, RN

Practice Lead

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Tanya is a vibrant and self motivated individual. She is a fast learner who enjoys a challenge. Tanya worked in the restaurant industry while in college and learned to multitask and build relationships with customers from all walks of life. While attending San Jose State University for her bachelors degree in Nursing, Tanyaalso pursued the esthetics program at San Jose City College and become a licensed esthetician.


As an esthetician and registered nurse, Tanya followed her passion for all things skin and went into dermatology. Tanya is the first generation in her family to obtain a college degree. She has worked at various hospitals, private practice, and clinics, gaining extensive experience including medical, surgical, and cosmetic dermatology.


Tanya is a bay area native growing up in San Mateo, attending high school in Sunnyvale, and now resides with her husband and “fur baby” in San Jose. Tanya is an animal lover, avid gym rat and yoga enthusiast, who enjoys reading and the outdoors.


Ngoc Luu

Lead Host

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Ngoc graduated from San Francisco State University with a Bachelor of Science in Microbiology with the goal of being in the healthcare field. She has been working since the age of sixteen with work backgrounds in health, education, and customer service. She has a passion for helping others and has done four years of volunteer work for Kaiser Permanente as well as interning as a physical therapy aid. She hopes to apply that same passion in the workplace. She enjoys meditating, traveling, being outdoors with her three dogs, and spending time with family, which one day, she hopes to start one of her own. Please take caution- Ngoc is energetic, outgoing and can be excessively bubbly!


Sunny Kullar


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Sunny has been a key proponent to client satisfaction for the past five years. He strives on exceeding goals and understands the importance of positive client experience. Having worked in a dental office he gained the expertise to become personable with patients and having the ability to comfort any anxiety prior to a procedure. Mostly recently as a administrative project manager Sunny guided foreign and domestic food distributors through the nut buying process. Sunny also was a tutor and student coach during his senior year in high school where he showed children what they could achieve if they truly applied themselves.


Sunny was born in Leicester England and moved to California at the age of seven. He attended Las Positas College and is currently working towards his Bachelor’s degree in Business Administration. As an avid classical indian drummer he devotes most weekends teaching and performing the art form at charity and community events. Along with being a musician he enjoys cycling, barbecuing with family and having just been recently married, cherishes the perks of sharing time with a loved one.


David Rall


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David is a highly motivated and empathetic person who has always given a 110% effort in to anything he puts his mind to. He has held a variety of different jobs since he has entered the workforce and all have been beneficial to his professional development. David was a barista/manager in his hometown coffee shop for 2 years. There he learned valuable customer service skills and administrative skills. David interned for a hospital’s health education department during his final semester of college, which later turned into a full-time position as a program assistant. This job enabled him to work in a clinical setting and gain professional experience.


David was born and raised in Lodi, CA. He attended college at San Jose State University where he earned his Bachelor’s of Science degree in Health Science with a Concentration in Health Services and Administration. David is the oldest of six children and enjoys being with his family more than anything. In his free time, he enjoys lifting weights, playing basketball, and being in nature. David’s favorite places to be are Lake Tahoe and Yosemite.


Kristin Seaburg, DPT, ATC

Physical Therapy

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Kristin is a high energy and motivated health care provider who is dedicated to education of her clients and patients. She loves to communicate and knows that a warm smile and genuine interest in people goes a long way to establish meaningful relationships. Kristin is dedicated to working at the top of her license by pushing boundaries and always strives to improve upon her skills personally and professionally. She enjoys furthering her education by traditional coursework but also understands the most meaningful learning comes from the experts she works with every day. Kristin began her medical career as a lifeguard at the age of 13. She enjoys being outside and “keeping a keen eye out” for her patients still! After completing her double major in Spanish as well as Athletic Training she worked as an Athletic Trainer for all level sports from pediatrics to professional athletes while going back to school for a Doctorate in Physical Therapy. Kristin loves to encourage people to move in whatever capacity they feel comfortable and then challenge them to move a little bit more. She is very comfortable encouraging and supporting others to reach their goals in life and in wellness. Living overseas as well as on multiple coasts of the US has allowed Kristin to appreciate the rich and diverse culture that others bring to a work relationship. She appreciates learning about others belief systems and values and understands that is what motivates us all towards our best self. Kristin loves research, publishing, lecturing and teaching on large and small scales She is passionate about program development and this has rewarded her with national and international speaking invitations. Kristin’s unique specializations in addition to traditional PT include emergency medicine physical therapy and the Vestibular (inner ear/ “dizzy”) population.


Kristin was born and raised in upstate New York. She went to undergraduate school at an all women’s institution Russell Sage College where she received a dual degree in Spanish and Sports Medicine (Athletic Training). She then continued with her Doctorate in Physical Therapy at Sage Graduate School in Troy, NY. She is very proud of her east coast roots and still has a wonderful accent should she feel inspired to share it. After many strong internships and employment opportunities in NY and NJ as well as Sevilla, Spain, Kristin decided to take the leap to California. She has worked and lived in Northern California for over 10 years in all settings of Physical Therapy and health care.


Some hobbies Kristin enjoys include: sailing, scuba diving, biking, swimming, paddle boarding, camping, cooking, weaving, reading, hiking, road trips, card games making people laugh and a good healthy prank. She spends as much of her free time as she can traveling to see family and friends.


Jerod Gard, DPT

Physical Therapy

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Jerod achieved his doctorate of physical therapy from Wichita State University before settling in the Chicago area. After achieving his goal of becoming a Certified Functional Manual Therapist from the Institute of Physical Art, he headed out to the west coast to promote health and optimal function. For the past four years, he has been helping his patients overcome injury, poor function, bad posture, and body mechanics issues. He prides himself on his physical assessment, clinical diagnosis, and treatment techniques to resolve the underlying drivers of the physical dysfunctions causing the symptoms.


Jerod played competitive rugby through college at Pittsburgh State University and with many club teams in Kansas, Chicago and Brazil. Being new to California, he keeps very active exploring the state’s vast natural diversity. He enjoys trail running, mountain biking, hiking and camping. In addition to health and wellness promotion, Jerod’s other passion is music. He enjoys playing the guitar and banjo, and is particularly fond of blues and folk music.


Tomo Harada, DC


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Dr. Tomo Harada has dedicated his life to treating sports injuries and teaching proper biomechanics. He practices a hands-on and comprehensive approach to recovery from injury combined with a focus on the prevention of future injury. His expertise and caring demeanor has earned him the trust of professional and collegiate athletes, as well as countless residents in Bay Area.


Dr. Tomo became a nationally recognized member of the American Chiropractic Board of Sports Physicians, receiving the designation of C.C.S.P. (Certified Chiropractic Sports Physician). Additionally, he is full-body certified in Active Release Technique,(ART) also ART complex protocol, ART nerve entrapment, Rock Tape, The Functional Movement Screen (FMS), Selective Functional Movement Assessment (SFMA), Performance Movement Techniques (PMT), Functional and Kinetic Treatment with Rehab (FAKTR) and Graston Technique provider.


Dr. Tomo, a native of Yokohama, Japan graduated from Teikyo University in 1999 and received his Doctor of Chiropractic degree from the Palmer Chiropractic West College. In 2015, Dr. Harada achieved his goal of opening his own practice, where his patients included members of the San Jose Earthquakes, the San Jose Sharks – and the San Francisco 49ers. He maintains his practice at Zero to Hundred Sports Chiropractic in San Jose. In 2016, Dr. Harada was appointed to the sports care staff for the San Francisco 49ers.


Brendon Rearick, CFSU

Strength Coach

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Brendon’s personal mission is to spread the positive by-products of coaching and movement by using strength and conditioning as his platform. As a member of the Crossover care team, he is on a mission to make physical activity the new “most commonly prescribed drug.”


With a degree in Kinesiology from the University of Massachusetts Amherst, Brendon got his start at Mike Boyle Strength and Conditioning (MBSC) in Woburn, MA. The growth-focused environment at MBSC motivated Brendon in a way he had never experienced. Over a few short years he progressed to become the Program Director and earned his massage therapy license. Soon thereafter, he started an education company with four co-workers – Certified Functional Strength Coach. In just three years, CFSC has certified over 3,000 trainers in over 20 countries.


Now a California resident, Brendon travels and coaches often for Certified Functional Strength Coach, and has recently become an active speaker at the Perform Better summit conferences. With an inexhaustible drive to learn more, practice his craft, and be the best version of himself, Brendon dedicates his free time to continuing education, dancing with his 3-year old daughter, reading, writing, and enjoying in the outdoors.


Allison Tanner

Strength Coach

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Allison developed a passion for strength and conditioning when she started training to play Division 1 field hockey at Quinnipiac University located in Hamden, CT. While she attended school she was diagnosed with a brain infection that changed her career path and life plan. She began to realize that health should be a priority and that taking care of your body can sometimes be the best form of medicine.


She earned her degree in Health Sciences from Quinnipiac University in May of 2017 and completed several internships before earning her CSCS in 2018. She also has an FMS certification.


Allison believes that exercise is much more than just getting strong or getting fit. She believes that exercise can help improve health status, movement patterns, prolong life expectancy, as well as build confidence.


Outside of the gym, Allison loves to continue to educate herself as much as possible by reading and spending time with other fitness professionals. She also enjoys going to the beach and traveling.


Danielle Heuseveldt, RD, LDN, CHWC

Registered Dietitian

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Danielle is both a registered dietitian and certified health and wellness coach. In addition to a wealth of knowledge, she brings passion, compassion, practicality and a touch of fun to the coaching partnership.


Members leave coaching sessions feeling encouraged and empowered to take charge of their health. Through more than a decade working as a clinical dietitian and as a health coach, Danielle has extensive experience meeting a variety of needs including weight management, diabetes, high cholesterol, high blood pressure, stress management, pre-natal nutrition, tobacco cessation, sports nutrition, and optimizing energy and performance. Danielle prides herself on the relationships she forms with her members by really getting to know them so that she can provide tailored, holistic and realistic guidance toward goals.


Danielle practices what she preaches by trying to live the healthiest lifestyle without sacrificing the fun and enjoyment of food and physical activity.


Brittany Murray, MPH

Health Coach

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Brittany has a holistic approach to health and wellness, which means that she looks at how all areas of your life are connected. Brittany will help you navigate the world of contradictory nutrition and health advice in order to determine what choices are beneficial for you. She acknowledges that people tend to hang onto what they know and what has given them a sense of safety. While working together, you will create a safe, peaceful environment that will empower you to bring forth a newfound sense of confidence bringing you back to balance –physically and mentally. Together you will uncover how all parts of your life affect your wellness, develop a deeper understanding of the food and lifestyle choices that work best for you, learn to listen to your body, and implement these lasting changes.


Brittany was born and raised in New Jersey. She attended The George Washington University in Washington, D.C where she earned a Masters in Public Health. Brittany is the middle child of a very close knot family which she considers her best friends and misses them all being in New York. In her spare time, she loves to workout, attend yoga classes, cook and anything that involves the beautiful California weather.


Khanie Ha, LAc


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Khanie is a licensed Acupuncturist in CA and WA state. She received her Master’s in Traditional Chinese Medicine from the Academy of Chinese Culture and Health Sciences in Oakland, CA and specializes in pain management, chronic internal diseases as well as psycho-somatic conditions such as addictions, anxiety and depression. She also has a background in counseling with a Master’s in Social Work from the University of Washington in Seattle, WA. For difficult conditions, she utilizes Neuro-Emotional Technique which combines her chinese medical and counseling background for a more comprehensive healing treatment.


Khanie grew up in Seattle, WA with her immigrant mother who always emphasized tenets of chinese medicine in her upbringing. As well, her late grandfather was a traditional healer that had much influence on Khanie’s natural abilities to help others live their healthiest life physically, emotionally and spiritually. During her spare time, she enjoys hiking, qigong, camping and snowboarding in the winters. She lives in Oakland with her partner, two bunnies and a cat.


Irwin Tjiong, LAc


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Irwin bridges the gap between the corporate, medical, and human services worlds with his diverse set of complementary skills and experiences. He values translating Eastern medical philosophy and practices to Western audiences to better address the ailments of today’s workforce. Raised by MD parents in the Netherlands, Irwin’s early upbringing centered on nurturing the body, mind, and spirit with curiosity, compassion, and balance. Firmly rooted in these beliefs – and having earned a Master’s in Business Administration – he has branched out to live and work for software and financial corporations across Asia, Europe, and the United States.


After assisting in the 2004 Asian Tsunami relief efforts, Irwin transitioned to the healing arts, earning a Master’s in Science in Traditional Chinese Medicine. He is a nationally and California licensed acupuncturist and has served on the Board of the American Association of Acupuncture and Oriental Medicine (AAAOM). He is currently a member-at-large of the 2020 Bay Area Task Force of the American Heart Association and lives in El Cerrito with his wife and 2 – very young – children.


Michelle Spoelstra, PsyD

Clinical Psychologist

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Dr. Michelle Spoelstra is a licensed clinical psychologist, with over twelve years in the mental health field. Dr. Spoelstra has spent the last 7 years in both university mental health, as well as private practice. Her areas of expertise include working with depression, anxiety, relational issues, work/life balance, life transitions, stress management and strengthening self-care. She is passionate about providing supportive, holistic care to her clients. Her work is rooted in the belief that each client has a unique set of gifts, abilities and strengths, which can be harnessed in the process of personal growth. Michelle received her B.A. degree in both Psychology and History from Westmont College. She received her M.A. in Counseling Psychology from Santa Clara University and her Psy.D. in Clinical Psychology from The Wright Institute.


In her free time, Michelle enjoys being with family and friends, whether it be baking, cooking, hiking, relaxing or enjoying the greater Bay Area. She also loves to travel and experience new cultures and traditions, and tries to venture out regularly, whether to a new town or a new country.


Azra Alic, LCSW

Licensed Clinical Social Worker

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Azra obtained her Bachelors in Psychology from the University of Michigan and her Masters Degree in Social Work from the University of Michigan School of Social Work. She went on to complete a two-year post graduate fellowship at the the University of Michigan’s Department of Psychiatry where she obtained specialized training in the Anxiety Disorders Program and the Perinatal Team. She has provided clinical services in large health systems, in a community non-profit organization, and in private practice. She particularly enjoys working with clients who are struggling with anxiety.


Azra was born in Bosnia and Herzegovina and grew up there and in Germany before moving to Michigan at age 11. Since relocating to the Bay Area in 2016, she has enjoyed exploring the area’s beautiful scenery and searching for the area’s best Korean BBQ.


Dianna Lam, OD


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Dianna is a Bay Area native, born and raised in San Jose, California. She was eager to venture out of the Bay and attended UC San Diego where she earned her bachelor’s degree in General Biology with a minor in History. After spending four years in Southern California, it was time to move back home to the Bay Area.


Dianna obtained her doctorate degree in Optometry at UC Berkeley where she graduated with clinical honors. Her honors thesis focused on carotid artery disease and how it affects the eye. Her training includes: Meredith Morgan Eye Center at UC Berkeley, the Alameda Health System in both Oakland and Hayward, and the Veteran Affairs in Tacoma, Washington. She also completed a mission trip to San Juan del Sur, Nicaragua with VOSH (Volunteer Optometric Services to Humanity).


In her free time, she enjoys traveling, going to barre and spin classes, and spending time with family, friends, and her Jack Russell Terrier, Booboo.


Anastasia Alvarez

Marketing Specialist

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Anastasia has a gift for relationship building which she has honed in a variety of clinical settings over her working experience. In her role as host, Anastasia is the first person to greet you and help you feel welcome as you begin the care experience. She also helps with any patient service issues, including coordinate appropriate follow up. She was fortunate to work and gain experience while in various medical clinics ranging from a surgery office to a physical therapy clinic. Anastasia is a San Francisco native and a graduate of St. Mary’s College of California.


Anastasia loves San Francisco and continues to enjoy exploring and finding hidden gems the the city has to offer. She has a goal to visit every stadium in the NFL and MLB. She has a passion for sports, including both the Giants and 49ers. She previously served as a 49ers Fan ambassador where she provided game day customer service for 5 seasons. When not working she enjoys traveling and hanging with friends and family.


Melissa Hann

Referral Coordinator

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Melissa is a high-energy individual who thrives best in social settings. Melissa is more than a morning person, she is an all day person with a happy and helpful attitude. She enjoys working in environments that challenge her and allow her to collaborate with different personalities. Opportunities to express creativity and explore new ideas are important to her. She is self-motivated and tackles new projects with enthusiasm. Her extensive experience in fast-paced customer service makes her a great fit for the Crossover team and their clients.


Melissa was born and raised in the San Francisco Bay Area. She received her Bachelor of Science Degree in Kinesiology from San Jose State University. During that time, her experiences include internships and volunteer work that gave her the opportunity to work with Special Olympic athletes and various age groups. Melissa also enjoys cooking and is constructing her own book of recipes. Bikram yoga is her favorite method of relaxation and physical activity. Most of all, she loves spending leisure time outdoors with her dog Izze.


Paul Estioko

Referral Coordinator

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Paul is an amiable and adventurous individual with the personal goal to make at least one person smile a day. Meeting new people, delving into new experiences and places, and attempting to find comfort during uncomfortable situations are a few things he finds joy in. Ever since Paul was old enough to work, he began learning and fostering invaluable skills from working in varied industries – education, restaurant, fine arts, and rehabilitation to name a few.


Paul was born in the Philippines and immigrated to the United States in 1997 and is the youngest of six children. He attended college at San Jose State University where he was Cum Laude and received his Bachelor’s of Science in Health Science and also minored in Kinesiology. Outside of the clinic, He is also a “triple threat.” Paul is a professional performer who sings, acts, and dances for theatre, film, and private events around the Bay Area and abroad. Paul also is a Hula/Tahitian dancer, loves comic books, and believes stickers are too much commitment.

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