Signal Hill Staff

Our practitioners are accustomed to delivering care in our offices or in hospitals, rehabilitation centers, skilled nursing facilities, and occasionally to a patient’s home. We are also available to deliver care 24/7. This level of service and expertise provides the highest standards of quality and care for you.

Irma Aguilar

Patient Services Coordinator

Susie Cortez

Accounts Receivable Specialist

Susie Cortez has been in the Orthotic and Prosthetic Field for a combined total of around 20 + years. She is an Accounts Receivable Specialist for the Prosthetic & Orthotic Group in their Los Angeles, San Gabriel and Mission Viejo offices. Over the years, she has developed strong skills that has helped her succeed in her role. She has been married to her wonderful husband for 32 years and together they have one daughter, three sons and four grandchildren.

Alyssa Goldberg, MSOP


Alyssa Goldberg grew up in Southern California and found the Prosthetic and Orthotic field when she was sixteen years old. She started by completing her Bachelors of Science in Kinesiology with a concentration in Exercise Science from California State University Monterey Bay in 2014. By finishing her degree, she became a certified personal trainer through the American College of Sports Medicine. After, she started volunteering at multiple Prosthetic and Orthotic offices in the Southern California area. Next, she continued her education and attended California State University Dominguez Hills for her Master’s in Prosthetics and Orthotics. In 2018, she completed her degree and landed a residency, here with P & O Group. In the next two years, she plans on taking the boards in both Orthotics and Prosthetics.

Brittany Gonzalez CPO

Certified Orthotist/Prosthetist

Mrs. Gonzalez obtained a Master’s degree in orthotics and prosthetics at California State University Dominguez Hills (CSUDH) in 2015. Concurrent with her classes, she worked as a research assistant at the Veterans Administration (VA) Hospital in Long Beach, California. Prior to her matriculation from CSUDH, Mrs. Gonzalez’s research on transfemoral gait was chosen to be presented at the American Academy of Orthotists and Prosthetists (AAOP) national meeting in New Orleans, Louisiana. Mrs. Gonzalez then went on to complete both her orthotic and prosthetic residencies at Prosthetic and Orthotic Group in southern California. She now works as a clinical practitioner, specializing in pediatrics and cranial remolding orthoses in both the Signal Hill and Torrance office locations. Mrs. Gonzalez is also credentialed at Children’s Hospital of Los Angeles (CHLA) and is a part-time instructor at the orthotic and prosthetic master’s program at CSUDH.

Sarah Hoffmann

Accounts Payables

Sarah Hoffmann began her accounting career in 2009 as a Controller for a real estate office in Long Beach, California. In 2013 she switched gears and moved into an accounting position for a McDonald’s Franchisee where she was responsible for over 11 restaurants. In 2017 she joined Prosthetic & Orthotic Group as an Accounts Payable Specialist and Administrative Support Specialist. Sarah has a daughter named Chloe (1) and two step children, Andrew (9) and Liam (6). In her free time she is jam packed with various sporting events, recitals and family functions. Sarah enjoys service work, great food, and movies at home.

Sonia Marlow

Operation Director

Sonia Marlow has been in working in the Orthotics and Prosthetic field for over 35 years. She worked for 15 years as the Area Administrator Manager managing 15 locations in Southern California with Orthomedics-Novacare. She then joined Prosthetic & Orthotic Group in 1998 as the Operations Director working in the San Gabriel Valley Office. Sonia love’s life and enjoys traveling, bike riding and kayaking but, her biggest love right now is being a grandma and spending time with her family.

Linda Matlock

Contracting Coordinator

Linda was born and raised in Long Beach, California. Her mother was in education and her father was a mechanic. Linda is the the middle child of five girls and education has always been very important in the family. Her father, who never completed high school, was very insistent that she persue higher learning. Linda is very proud of my sister; 2 engineers, a lawyer, and a dentist. Linda graduated from the University of Southern California with a bachelors and Master’s degree in nursing and health administration. She was employed with the County of Los Angeles as a pediatric and labor and delivery nurse when she moved back to Long Beach. She then worked with Long Beach Memorial Hospital as an orthopedic nurse.
She reunited with her high school sweetheart and has been married for 30+ years. Together, her and her husband enjoy long walks, golfing and traveling. They have attended the summer Olympics games since 1988, and have traveled all over the world. They were blessed with twins (sons) one a civil engineer and the other a physician.
At this junction of her career she is very happy to be a part of the P&O family in medical contracting and looking forward to contributing from her experience in nursing and the professional relationships she has developed over the years.

Glenn Matsushima

Certified Prosthetist Orthotist

He completed the O&P program from California State University of Dominguez Hills and has enjoyed the field ever since. Glenn loves all the technological advances in the field since he has started and integrates CAD 3D design whenever he can. Over the years he has specialized in upper extremity prosthetics, Scoliosis orthotics and cranial remolding orthotics. He has also been on the board of many organizations including The American Orthotics and Prosthetics Association (AOPA), The American Board for Certification for Orthotics and Prosthetics (ABC), the National Commission on Orthotic and Prosthetic Education (NCOPE), and multiple manufacturer boards. When he is not at work Glenn enjoys surfing and spending time with his wife and five children.

Miki Matsushima

Accounts Payable

Miki Matsushima started working with Prosthetic & Orthotic Group in 2015 as an Accounts Payables Specialist for their Signal Hill Office.  After being a full-time mom for the last 17 years and volunteering at her two children’s schools and extracurricular activities they now both have graduated from high school, she was ready to get back in the workforce again.  She has been married to her husband Mark since March 1992 and they have 2 children Maxx and Madi.

Edward Matthews


Edward Matthews is from South America and came to the US in 1992. He started with Vogue Prosthetics and Orthotics. Ed became and Orthopedic Technician with Orthopliance and was there for 15 years. In 2015 he started with Prosthetic & Orthotic Group as an Orthotic Technician in the Signal Hill Office.

Kate Muller CPO

Certified Prosthetist Orthotist | Compliance Manager

Kate has been in orthotics and prosthetics for 25 years. In 1995 she obtained her orthotic and prosthetic education at Northwestern University and went on to complete an orthotic residency at the University of Michigan. She moved to Southern California and worked for seven years as a clinical practitioner, specializing in pediatrics, before transitioning to the educational side of O&P. In 2003 she was asked to join the California State University Dominguez Hills (CSUDH) O&P program as the Lead Orthotic Instructor. In 2011, she transitioned out of full time teaching to focus her efforts into a consulting company, K&M Clinical Services, LLC. Her company specializes in O&P education and curriculum development for universities, manufacturers and practitioners. Over the past six years, Kate has kept herself in the forefront of O&P education by maintaining a part time faculty position at CSUDH, being the President of K&M, serving on NCOPE’s Self Study Review and eAccreditation Committees, serving on the Orthotic and Prosthetic Education and Research Foundation’s (OPERF) Education Committee, and she currently is the Chairperson for the Orthotic Prosthetic Education Council (OPEC) of the American Academy of Orthotists and Prosthetists.

Kris F. Reed

Human Resources & Operations Manager

Kris Reed is a native southern Californian growing up in Los Angeles. He has worked in Human Resources for over 15 years holding positions with smaller non-profits organizations as well as several Fortune 500 companies. He brings his passion for people, psychology, business and law to the OPNN team and is excited about helping us focus on our “families, education and monetary rewards”. Away from OPNN he can be found actively serving in ministry at his local church, reading, enjoying movies and cheering for the Lakers, Dodgers and Trojans. Kris has been married to the love of his life, Carmen, for 23 years and they have 3 incredible children together: Kamren (daughter, 20), Kris II “Reec” (son, 16), and K’Cia “See-uh” (daughter, 13). He earned a BA in Psychology from San Diego State University as well as a MA in Theology and Apologetics from Biola University.

Vince Snider

Lead Technician

Vince Snider is from Southern California. In 1990 he started his career as an Orthotic Technician. In 1999 he was the Fabrication Manager for a large corporate O&P facility where he started to learn about Prosthetics. Vince joined Prosthetic & Orthotic Group in 2001 as the Fabrication Manger in the Signal Hill Office. He loves hanging out with his kids while they still let him. In his spare time he likes to read and watch hockey.

Mark Somoza CTP

Certified Technician of Prosthetics

Mark Somoza is a certified Technician in Prosthetics. 30+ yrs. experience in the fabrication of prosthetics and orthotics. Certified by ABC in 2002 as a prosthetic technician. Was in charge of all technical operations for a central fabrication lab in Whittier Ca. since 2005 before joining POG. Married with a son who served in U.S. Air Force and is currently residing in Las Vegas. Hobbies include getting out in the great outdoors, camping, fishing, boating. Enjoys spending time with family and friends over a great bar-b-q and the occasional poker night with the boys.

Larry Wong CP

Certified Prosthetist | Clinical Manager

Mr. Wong graduated from the University of California Los Angeles (UCLA) in 1980 with a Bachelor’s degree in kinesiology.  His intention was to be a physical therapist but found the field of orthotics and prosthetics to be his calling.  He matriculated from the UCLA Orthotic & Prosthetic Program in 1981.


Mr. Wong has worked as a clinical practitioner throughout his career, honing his skills throughout Los Angeles and Orange Counties.  He has been in Long Beach since 2001.  Though he may be certified in prosthetics only, he can proficiently handle any orthotic situation as easily as prosthetics.  In particular, he has an affinity for knee-ankle-foot orthosis (KAFO) designs.  Mr. Wong also regularly attends the Perez Medical Therapy Unit (MTU) in the Los Angeles Unified School District.


When not in the office, Larry enjoys playing tennis and running. In 2017, he completed his 31stmarathon by participating in the New York City marathon.  He is a fervent fan of the Dodgers, Kings and anything UCLA.

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