Mumper, who joined Grubb & Ellis a year ago as director of management services in the Santa Ana-based company's Downtown L.A. office, says that Grubb & Ellis will mount "an intensive marketing campaign" to reintroduce 2600 Michelson. Greg May and Oliver Fleener, both senior vice presidents in the Newport Beach office of Grubb & Ellis, will be responsible for leasing the asset, where spaces available range from 1,400 square feet to 80,000 square feet.

One objective of the new marketing campaign will be "to make the market aware that the ownership structure is fully capable to fund tenant improvement and commissions," according to May. He says that Grubb & Ellis has already received numerous inquiries since it took the leasing assignment and is involved in negotiations with a number of tenants.

Mumper's appointment is the latest in a sequence of events involving 2600 Michelson and other Maguire Orange County assets since the L.A.-based office REIT said in August that it planned to default on the loans for 2600 Michelson and five other properties to "eliminate the adverse effect these assets have had on the company's cash position."

The five other properties are the 264,000-square-foot Stadium Towers in Central Orange County, the 827,000-square-foot Pacific Arts Plaza in Costa Mesa, the 622,000-square-foot 550 S. Hope in Downtown Los Angeles, the 334,000-square-foot 500 Orange Tower in Central Orange County and Park Place II in Irvine.