J.F. Lehman & Company, a middle-market private equity firm, completed the acquisition of ENTACT, a national provider of environmental remediation and geotechnical services. Financial terms were not disclosed. "J.F. Lehman & Company is an excellent, value-add partner to support the next phase of ENTACT's growth. We look forward to leveraging JFLCO's industry experience and capital base while continuing on our successful history of providing exceptional service to our customers," Dean Pisani, ENTACT CEO.