Quinn, who retired from the Secret Service in 2021 after more than 20 years, returned in May 2025 at the request of Director Sean Curran. Before his return, he worked as a senior executive at Fortem Technologies, a company specializing in counter-drone technology.
In his letter, Quinn wrote that he had discussed his goal of leaving the position as quickly as possible with Curran last year. "I initially retired from the Secret Service in 2021 as a Deputy Assistant Director in OPO," he wrote. "For me, returning to the Service was never intended to be a long-term second career, rather an opportunity to support Director Curran and the agency to make rapid, effective change across the organization."
During his tenure, Quinn said the agency made progress in staffing, training, technology and operational capabilities. He cited efforts to rebuild the workforce and add nearly 1,000 net law enforcement personnel in fiscal year 2026.
His departure comes days after a 60 Minutes report that examined the Secret Service's efforts to counter drone threats. Quinn acknowledged in the interview that the agency had not yet solved the threat posed by drone swarms.
Quinn thanked agency employees and senior leadership, including Curran, for their support. He said he plans to remain available to the agency after leaving his position. "The stakes have never been higher," Quinn wrote. "Stay safe, look out for each other, and continue pushing the limits of what is possible."