CARY, N.C. — Julius Genachowski, founder and managing director of advisory and investment services firm Rock Creek Ventures, has joined the board of advisors for

The Cary company provides business communications solutions.

Genachowski is also a special advisor to General Atlantic, a global private equity firm. Before founding Rock Creek, he worked eight years with InterActiveCorp, the firm run by entrepreneur Barry Diller. InterActiveCorp operates such firms as LendingTree in Charlotte, and Expedia.