AE Industrial Partners, a private equity firm, completed the acquisition of Cross-Fire & Security, a full-service fire and life safety services company. Financial terms were not disclosed. "We are excited to have the opportunity to create a unique platform with significant scale and national reach. We look forward to partnering with the founders, Brendan and Kevin, and our industry experts, Kelly, Ed and others, as we grow the business," Charlie Santos-Buch, AEI Partner.