Darrell Davis began his career as a forensic chemist with the Drug Enforcement Administration in 1979 at the Southwest Laboratory in San Diego, California. As a forensic chemist, Davis was responsible for analyzing seized evidence for the presence of controlled substances. Mr. Davis is also qualified as an expert witness in over 10 states and was a leader in the DEA laboratory as an expert in the seizure of clandestine drug laboratories. Additionally, he trained law enforcement personnel and state and local chemists in the manufacture of controlled substances.

From 2000-2012 he served as the Laboratory Director for the Drug Enforcement Administration's South Central Laboratory in Dallas before retiring from the federal government. In 2001, he co-founded and became president of Committee for Action Program Services (CAPS), which is a non-profit Science and Technology Organization located in Cedar Hill, Texas. The primary objective of the organization is to offer professional development to K-12 Science Educators and enrichment programs for students who seek careers in science and technology. Through CAPS, Mr. Davis has begun to address the issue of getting more minorities, particularly African Americans students interested in and pursuing a career in science. Through the CAPS Initiative, Mr. Davis has expanded his work to the state of Georgia providing classroom resources to Wilkinson County Schools.