Brian Quinn of Seaford has been appointed to the National Multiple Sclerosis Society's Long Island Chapter board of trustees. He is the center manager at St. Charles Hospital's Outpatient Rehab Network in Smithtown.
Tim Plenk of Lindenhurst has been appointed director of environmental and housekeeping services at Grace Plaza Nursing & Rehabilitation Center in Great Neck. He was director of plant operations at The Amsterdam at Harborside in Port Washington.
Jean Derespina of Miller Place has joined H & G Realty in Miller Place as a licensed salesperson. She was a product marketing director at The NPD Group in Port Washington.
Mark Ferretti of Smithtown has joined SiSense in Manhattan as vice president for global alliances and channels. He was vice president for global alliances at PROS in Houston.