TorQuest Partners, a private equity firm, completed the investment in Onyx-Fire, a provider of fire and sprinkler system inspections, maintenance, repair and installation services. Financial terms were not disclosed. “We are thrilled to be taking on a strong new partner who believes in the growth potential of our business and is experienced in working with companies like ours to build longstanding value. We look forward to leveraging Torquest’s capabilities and relationships to grow the business," Rob Frappa, Onyx President.