Gyimah is a highly respected geotechnical engineer beginning his career at R+C in 1981 and currently leads the geotechnical department, where he is known for his philosophy of effective communication and excellent customer service. This has resulted in long-term relationships with prestigious clients, such as UC San Francisco and the SLAC National Accelerator Laboratory. His expertise has been critical to major projects including the California Academy of Sciences, de Young Museum, and the expansion of Lucile Packard Children's Hospital. In addition to his design and engineering work, Gyimah is also a noted speaker who has lectured on performance-based design along the West Coast for the Earthquake Engineering Research Institute. He is currently involved in several industry committees including the BSSC Provisions Update Committee, the Engineering Design Review Team for the City of San Francisco, and the Advisory Committee on Structural Safety of Department of Veterans Affairs Facilities.‍