David Brinkley

  • Managing Director
(add to contacts)


David brings twenty years of experience executing over $1bn in strategic transactions for middle market firms in the aerospace, defense and government sectors. 

David is widely recognized for his industry expertise, which encompasses intelligence and national security activities and applied advanced technologies. In addition, David holds unique security credentials that enable him to advise on the most sensitive government transactions. David also serves as a subject matter expert to the Office of the Secretary of Defense on matters pertaining to the financial health of the US defense industrial base and on Pentagon-sponsored technology investments.

Prior to joining Capstone Headwaters, David founded Castellum Capital Advisors, a boutique investment bank providing advisory services to middle market firms engaged in the national security sector. Castellum Capital served as exclusive financial advisor on several high profile transactions, including large scale corporate divestitures and niche intelligence acquisitions. Prior to founding Castellum Capital, David served as Managing Director of Aronson Capital Partners, where he managed the firm’s buy and sell-side investment banking engagements. While at Aronson Capital, David completed transactions featuring prominent government services and technology firms active in international security, intelligence, and defense, with publicly-traded firms based both in the US and internationally, and with leading private equity sponsors. 


Columbia University - MBA - Finance

Georgetown University's School of Foreign Service - BS - International Relations

Registrations & Affiliations

FINRA - Series 63 Registered Uniform Securities Agent

FINRA - Series 79 Registered Investment Banking Representative

Industry Coverage

Year-to-date, 66 mergers and acquisitions were announced or closed in the Mapping, Modeling & Simulation industry putting activity on pace to meet or exceed 2017 activity. Strategic companies...Read more

We are pleased to present our 2018 second quarter Cybersecurity Capital Markets, Mergers & Acquisitions Update.In comparison to the first quarter of 2018, there were fewer merger and...Read more

Year-to-date the volume of M&A activity has declined versus the same period last year. However, this does not reflect the health of the broader Cybersecurity market as industry revenues,...Read more