One of the Boston-based organization's top three brokers, Mixer was named to the Colliers USA Board of Directors at the beginning of the year, and sits on its international governance and finance committees. He also sits on the board of directors of Colliers largest franchisee, Colliers Parrish International, and heads up Colliers' Resort & Gaming Group.

Mixer tells GlobeSt.com that compared to Carolyn Sidor, the day-to-day operations leader for Colliers International as a whole, "my role [as chairman] is more strategic, looking out for growth opportunities and perfecting the platforms used by Colliers brokers in the US and abroad."Colliers International has 293 affiliate offices in 61 countries in the Americas, Europe, the Middle East, Africa and Greater Asia. Colliers Parrish International, based in San Jose, CA, has 11 offices in California and Nevada, including the Las Vegas office.

With his added duties for the overarching organization as well as for Colliers Parrish, Mixer says he no longer has time for individual brokerage work. Instead, he is part of a three-person team in Las Vegas that includes brokers Michael Argier and Sonia Kelly, both of whom are also members of the Resort & Gaming group.