Daniel Gilmartin

Daniel Gilmartin is an experienced security professional currently serving as a Staff Security Engineer at Lambda since September 2025. Gilmartin has a diverse background as an angel investor in security and technology startups since September 2020 and is also the owner of Black Sun Enterprises since October 2015. Previously, Gilmartin held significant roles including Head of Security and GRC at GlossGenius, Staff Security Engineer at Brex and Slack, and Security Engineer II at Twitter. Gilmartin began a career in the technology sector as a System and Network Analyst at Montclair State University, where Gilmartin also earned a Bachelor of Science degree in Information Technology. Gilmartin also has experience as an owner of Secure Services of New Jersey and worked as an Emergency Medical Technician II at Atlantic Health.