Marmon/Keystone announced several sales appointments. Crissy Prull has been promoted to field sales manager for Marmon/Keystone’s Minnesota region, overseeing sales and marketing functions in Minnesota, northern and western Iowa. Mike Gregory has joined the company’s Atlanta (Norcross) service center as general sales manager with responsibility in the southeastern states. Dwight Tucker has been hired as an account manager for the Rochester, NY, branch.