Nautic Partners LLC, a middle-market private equity firm, partnered with management to acquire Cherry Hill, N.J.-based Source4Teachers.

Terms of the transaction were not disclosed.

Cherry Hill, N.J.-based S4T, through its Source4Teachers and MissionOne divisions, provides outsourced substitute teacher and paraprofessional managed services to more than 150 K-12 school districts in the eastern United States. It ranks third on Staffing Industry Analysts’ list of largest education staffing firms in the US with estimated 2013 US education temporary staffing revenue of $85 million.

“S4T delivers tremendous value to all stakeholders in a K-12 district,” said Doug Hill, managing director of Nautic. “We are extremely impressed by the company’s growth over the past few years, and by the operational expertise and strong leadership of S4T’s management.”

“In Nautic we have found the right partner for this next phase of growth at Source4Teachers,” said S4T President Kevin Bush. “Nautic shares our team’s vision of being the partner of choice for school districts to cost-effectively increase the quality of their substitute teacher and paraprofessional programs. We are optimistic about S4T’s opportunities to grow and deepen its school district partnerships, and we look forward to working with Nautic.”