The agency announced last year that it would allow children under 12 years old and seniors over the age of 75 to keep their shoes on in most instances after coming under fire for reports of patting down children as young as 8 months old.
Pistole said in Aspen that the TSA has made improvements to its security process in the 10 years since it was founded.
“We have progressed with the advent of technology,” he said, touting the agency's "PreCheck" known-passenger program.
Some Republican members of Congress have pressed TSA to cut its payroll, but Pistole said there were “no discussions about reducing the workforce."
The House Homeland Security Committee is scheduled to hold a hearing on Wednesday to examine "misconduct" among TSA screeners.