during the 114th congress (2015–2017), ratcliffe sat on the judiciary and homeland security committees, where he was a subcommittee chair on the house homeland security subcommittee on cybersecurity, infrastructure protection, and security technologies. during the 115th congress (2017–19), ratcliffe was a member of the ethics, judiciary, and homeland security committees. within the homeland security committee, he was a member of the subcommittee on oversight and management efficiency and chaired the subcommittee on cybersecurity and infrastructure protection. within the judiciary committee, he was a member of the subcommittee on crime, terrorism, homeland security and investigations and vice chairman of the subcommittee on regulatory reform, commercial and antitrust law.