PMK*BMC Co-Chairman and Chief Executive Michael Nyman is leaving the marketing and communications firm to launch a new investment and advisory venture, Acceleration.

Acceleration will advise, invest in and guide companies navigating the changing media landscape. The firm will create a collective of specialty firms to guide clients through their branding, marketing and media decisions.

“The new investment vehicle and advisory will focus on acquiring and building businesses to respond to today’s challenging and opportunistic digital landscape, and rapidly changing demands of the marketplace,” Nyman said.

Nyman is a 30-year communications veteran, who started his own firm, Bragman Nyman Cafarelli in 1991 before selling it to Interpublic Group of Companies in the fall of 2000. Nyman was asked in 2009 to lead the combined companies of PMK and BNC. Within four years, PMK*BNC had doubled its revenue and built a roster of 300 employees representing nearly 1,000 entertainment and Fortune 500 clients.

“When faced with the daunting task of bringing together publicity powerhouse PMK with brand giant BNC I knew my job would be infinitely easier with Michael Nyman as my partner,” said Co-chairman and CEO Cindi Berger. “I am thrilled for Michael and wish him the best of luck in his new venture.”

The executive said it was “difficult decision to leave the firm.”

Momentum Worldwide Charman and CEO Christopher Weil wished Nyman continued success.