The subcommittee oversees the National Reconnaissance Program, the National Geospatial-Intelligence Program, the General Defense Intelligence Program and some Department of Defense activities.
Stewart is said to be under consideration for Air Force secretary in the new Trump administration.
The subcommittee appointment comes days after Stewart backtracked on assertions he made in December that there was no evidence that Russian hacking in the 2016 election favored President-elect Donald Trump. A declassified intelligence report released Friday by the National Security Agency, FBI and CIA found Russia's cyberassault was meant to discredit Democrat Hillary Clinton and that Russian President Vladmir Putin had a "clear preference" for Republican Trump.
"It is very frustrating and concerning to me that for nearly a month, the administration chose to repeatedly leak information to the press while apparently refusing to tell the members of the House Intelligence Committee the whole story," Stewart said in response to the report.
Stewart also serves on the House Appropriations Committee.