Caltius Equity Partners in Los Angeles has acquired a controlling interest in Diversified Human Resources, a Phoenix-based HR firm that sells insurance, payroll services and temporary staffing solutions.

Financial details of the acquisition, which was announced Thursday, were not disclosed.

Caltius made the investment in conjunction with Kevin Mencarelli, a former executive at business insurance giant USI Insurance Services. Mencarelli will now serve as president of Diversified Human Resources. Founder Brian Lesk will continue as chief executive.

“We worked with Kevin for more than a year to identify a business services investment opportunity,” Michael Morgan, managing director of Caltius, said in a statement. “We look forward to working with him and DHR.”

Caltius Equity Partners makes equity investments between $5 million and $20 million in consumer and business services, education, health care and light manufacturing sectors.