On Assignment Inc. (NASD: ASGN)  will part ways with Shawn Mohr, its chief sales officer and president of its healthcare staffing division, according to a filing with the U.S. Securities and Exchange Commission on Tuesday, Nov. 27. Mohr's employment will end effective Dec. 31 in order to let him pursue other career opportunities.

Third-quarter revenue in the company's healthcare staffing division fell 1.3% year-over-year. The company cited "less-than-acceptable internal execution" in its allied healthcare group.