in 2002 harrison was selected by the united states office of the secretary of defense and the department of the army to lead the technical operations support activity (tosa), a secretive military organization created in 2003 chartered with finding and repurposing commercial technologies for sensitive military missions. harrison arranged for tosa personnel to be embedded with operational military units in afghanistan, iraq, and around the world to observe military and counter-terrorism operations, resulting in a number of revolutionary products delivered to the battlefield in the early phases of operation enduring freedom and operation iraqi freedom. during harrison’s tenure, the united states army awarded army greatest invention recognition to three tosa programs - the unattended transient acoustic masint system (utams) (2004), the persistent threat detection system (2005), and the constant hawk aerial surveillance system.