QualitySpeedIntegrity defines the culture and motivation of every employee.


TriWest Research Associates (TWRA) is a multi-specialty research center headquartered in San Diego, California. It is committed to supporting the biopharmaceutical and scientific research community by conducting high-quality clinical trials. We deliver reliable evaluation of pharmaceuticals and devices in a clinical environment; adhering to effective and ethical industry standards. We strive for scientific excellence in supporting novel drug development and contributing to global research solutions.

TriWest Research Associates (TWRA) was founded by Mr. Hakim Mohamed, CMCO, MBA who has over 15 years or start up and management of clinical research Sites, Dr. Louis J. Levy, Jr., a very well-known Orthopedic Surgeon with more than 35 years of clinical and research experience, Dr. Arthur Mabaquiao who is a board certified in both Internal Medicine and rheumatology with more than 12 years of clinical and research experience and Mr. Brian Norton who has 20 years of business development and management of clinical research Sites.

Our Founders

  • Hakim N. Mohamed, MBA CEO

    Prior to founding TriWest in 2009, Hakim held key positions with Synergy Clinical Research Center as Chief Financial Officer and Pacific Health Systems as Administrator & Privacy Officer. Prior to this, he held senior positions with Bayview Behavioral Campus, San Clemente Hospital and California Pacific Medical Center. He earned his MBA from National University, California.

    Hakim holds certificates in several advance courses including; Clinical Research Sites Administration, Certified Medical Compliance Officer and Site Operations and SOPs.

  • Louis J. Levy Jr., MD Medical Director

    Louis J. Levy Jr., MD is Board Certified in Orthopedic Surgery and Internal Medicine and has more than 30 years of experience in knee and hip surgery.

    Dr. Levy’s private practice co-exists in the same office suites as TWRA. This is a great advantage to the research pursuits as he is on-site and available to his research staff and patients alike. Sponsors and monitors appreciate our attitude and consistently return to us with follow-up studies.

  • Arthur R. Mabaquiao, MD Principale Investigator

    Ray Mabaquiao is  board certified in Internal Medicine and Rheumatology. He has been in private practice in the San Diego and El Cajon now for over ten years. He takes pride in his state of the art clinic work with intravenous and other injectable biologic therapies as well as musculoskeletal ultrasound examinations and guided injections.

    His desire to practice "cutting edge" medicine and to further his field blends well with Triwest Research.

  • Brian Norton Business Development

    Prior to founding TriWest Research Associates in 2009, Mr. Norton founded ClinTrial Networks (CTN) in 2007.  With more than 15 years experience in the pharmaceutical industry, Brian has leveraged both his business and extensive clinical trial experience and created a network of dedicated research sites worldwide.  

    Mr. Norton  holds his Bachelors of Science (Honors) in Hospital Administration from Southern Illinois University. He also holds certificates in several advanced courses including Advanced Clinical Drug Monitoring and GCP/ICH.


Our Sponsors