At Comcast, Clancy did not provide personal security for Brian Roberts and other top executives, as he did with the president. Instead, he had responsibility for the protection of Comcast‘s hundreds of call centers, warehouses, and technology facilities, where tens of thousands of employees work.

Clancy also was involved in the investigations into thefts of cable-TV service or equipment, such as set-top boxes. The company promoted him to executive director of cable security in May.