On Assignment Inc. is reshuffling its management in the wake of its recent purchase of IT staffing firm Apex Systems.

The Calabasas company has chosen Michael J. McGowan as its new chief operating officer. McCowan will remain division president of Oxford Global Resources, the company’s information technology and engineering division.

But starting June 1, he will also oversee the legacy divisions of the company, including life sciences, allied health care, nurse travel, and VISTA Staffing Solutions. Unit leaders of the legacy businesses will report to McCowan while McCowan will report to CEO Peter Dameris.

Rand Blazer, president of the newly acquired Apex Systems will report directly to Dameris. Blazer and his senior management team will continue to operate Apex Systems as a separate division.

“We are fortunate to have a proven, respected, and esteemed leader like Michael as part of our management team,” Dameris said in a statement. “Since becoming part of the On Assignment senior leadership team five years ago, Michael has done an excellent job leading Oxford Global Resources, and has gained the respect of his peers, shareholders, and our board of directors.”

He said he expects McGowan to bring strong leadership skills to managing On Assignment’s legacy business units.

Judy Temes