NorthMarq Capital has kicked off 2012 with some major changes at the top, as the firm has named Jeff Weidell and William Ross, who had held the respective positions of managing director and executive vice president, as presidents of the company.

It’s not just Manhattan that’s attracting investors to New York, and Marcus & Millichap Real Estate Investment Services has made a move to expand its services in the state with the opening of a new office in White Plains.

Despite the holiday season, December has been busy for many firms — JLL, Transwestern and CBRE, among others — with some new hires and promotions to key positions.

In an effort to continue the firm’s ongoing expansion outside its New York City base, Silverstein Properties Inc. has announced the appointment of Martin Burger as co-CEO. Burger, who joined Silverstein in February 2010, will now work directly alongside president & CEO Larry Silverstein.

News from around the industry: Barry Bartle has been named president of NAI Horizon’s property-management division. Mark Jaccom will become co-chair of Colliers’ New York tri-state region. Resource Real Estate hired John Towle as chief marketing officer. And Rick Del Roio has become Beech Street’s vice president of credit.

This week has seen four major hires: David Morrison as global head of strategy at CBRE-GI; Javier Rosenberg as Radisson COO and Carlson EVP; John Gavin as principal with Sterling Bay; and Mark Wanic as Cushman’s head of occupier services in the Americas.

Prudential Mortgage Capital has hired Michael McRoberts, the latest in a string of departures from the government-sponsored enterprises, to head its Fannie Mae and Freddie Mac lending business.

The Commercial Real Estate Women Network last night unveiled the winners of the new Impact Awards during the 2011 Convention & Marketplace near Washington, D.C.

Josh Cleveland comes to Clairvue Capital Partners from Liquid Realty Partners, where he was a director of business development.

Michael Hoffman is also first vice president & regional manager of the firm’s Denver office. He began his career with Marcus & Millichap in 1992.