David Hume was born in Boston and spent his early years in Eagle Pass, Texas. He graduated from the Saint James School, Hagerstown, Maryland, and received his BA (Social Science-cum laude) and JD from the University of Baltimore. He was awarded a research fellowship at the University of Delaware's College of Marine Studies, specializing in legal-environmental issues. He is a life member of the Sigma Chi Fraternity and the United States Naval Institute.

Hume served as chief of police, Little Creek, Delaware, and as an assistant attorney general for the State of Delaware, assigned to the Department of Natural Resources. He also served in the US Coast Guard, reaching the rank of lieutenant. Some of his assignments included assistant legal officer, intelligence officer (Miami Seventh Coast Guard District Headquarters) and Chief of Intelligence and Law Enforcement Division (Greater Antilles Section).

In 1984, Hume was ordered to Colombia after the assassination of Colombia's Attorney General, Rodrigo Lara Bonilla. He was assigned to the Colombian Navy's Atlantic Headquarters in Cartagena as the liaison and intelligence officer for the first multi-national maritime drug campaign, conducted with units from the United States, Colombia, and the UK.

From 1984-1988, Hume worked with DEA and US Customs personnel in various parts of South and Central America. In Colombia, Hume conducted anti-drug operations with the Colombian Navy, Colombian Marine Corps and the Anti-Narcotics Group of the Colombian National Police. His work in Colombia was characterized by the Coast Guard in his second award of the Coast Guard Commendation Medal as, "crucial to the international community's success against narcoterrorism".

David Hume presently serves as a safety and security consultant for the energy industry, transportation and manufacturing industries, doing business in the Americas. His safety and security experience includes the preparation and completion of projects in 32 countries in the Americas, Caribbean, Europe and the Middle East.

David Hume III was born in Boston and spent his early years in Eagle Pass, Texas. He graduated from the Saint James School, in Hagerstown, Maryland, and received his BA (Social Science-cum laude) and JD from the University of Baltimore. He was awarded a graduate research fellowship at the University of Delaware’s College of Marine Studies, specializing in legal-environmental issues. He is a life member of the United States Naval Institute. Hume served as Chief of Police, Little Creek, Delaware, and as an Assistant Attorney General for the State of Delaware, assigned to the Department of Natural Resources. He also served in the US Coast Guard, reaching the rank of Lieutenant. Some of his assignments included Assistant Legal Officer, Miami, (Seventh Coast Guard District Headquarters), Intelligence Officer, Miami (Seventh Coast Guard District Headquarters) and Chief of the Intelligence and Law Enforcement Division, San Juan (Greater Antilles Section). Hume presently works as a consultant for green energy projects in Latin America.