Brett O’Brien is the founder and a partner at the National Security Law Firm (NSLF), where he plays a key role in aligning the firm’s operations with its strategic vision.
His zealous representation of clients is backed by years of experience working within the federal government, giving him deep insight into the system and the government’s strategies.
He has dedicated his entire career to practicing national security law, with extensive experience advising the government on the temporary or permanent revocation of employees’ security clearances under the thirteen adjudicative guidelines.
Brett leverages this unique experience to fiercely advocate for his clients. In addition to his experience working at the Defense Office of Hearings and Appeals (DOHA), Brett has completed rigorous training, including the Navy’s classified litigation course, the U.S. Army’s Litigation Division’s Federal Litigation course, the U.S. Army’s new prosecutors course, and the U.S. Army’s intermediate trial advocacy course.
This comprehensive training has equipped him with specialized knowledge to handle cases involving classified reasons for revocation, enhancing his ability to represent his clients effectively in security clearance matters. Brett’s career includes 14 years of service in and support of the intelligence community.
He spent three years supporting Army intelligence units focused on operations south of the U.S. border, including U.S./Mexico border issues. He also served as a legal advisor for the Army’s counterintelligence organization for two and a half years, where he provided counsel on counterintelligence investigations and assisted technical experts in assessing employee truthfulness.
Throughout this period, Brett consistently advised his clients on security clearance revocations. As the founder and a partner at NSLF, Brett is not only an accomplished attorney but also a key figure in the firm’s day-to-day operations. He ensures that the firm’s departments work in harmony, aligning their efforts with the firm’s strategic objectives. Brett’s ability to coordinate and oversee the firm’s operations makes him essential to its success.
Brett graduated from Denison University in 2008 and Case Western Reserve University School of Law in 2011. During law school, he co-founded the military law society and played a significant role in creating a national security concentration within the school. National security law is not just a job for Brett; it is his career passion. He is admitted to practice law in New Jersey, the District of Columbia, New York, and Ohio.
