Mack Molding, a leading custom plastics molder and supplier of contract manufacturing services, has announced promotions within its Northern division for Dwalin DeBoer, Jon Whitney, Natasha Moses and Larry Hovish.

DeBoer has been promoted from business unit director to vice president of sales and engineering. He succeeds. With 29 years of plastics experience, including 24 at Mack, DeBoer brings a wealth of knowledge along with a strong track record of driving customer satisfaction and business continuity.

The College of Graduate and Continuing Studies at Norwich University has appointed Bill Lyons to oversee and facilitate graduate programs in cybersecurity; diplomacy; and strategic studies, and Robin Saunders to academic director of cybersecurity and information systems.

Stephanie Rivas, former partner at Baystate Financial, has joined National Life Group as Northeast regional vice president for affiliated distribution, effective Oct. 1.

Rivas comes to National Life with over 25 years of experience in the financial services industry. Prior to Baystate, She was managing partner of the Prudential Insurance Co. of America.

Darcy K. Tarte, former retail market manager for Vermont at TD Bank, has joined Community Bank as regional retail banking manager. In her new role, Tarte will manage the retail banking team and retail banking relationships across Community Bank's New England footprint in Vermont, Massachusetts and New Hampshire.

Tarte has 30 years of experience in the banking industry. She is a graduate of the New England College of Business and Finance and serves on the board of the Addison County Economic Development Corp.