STONINGTON — Two local institutions are experiencing a sea change in management.Peter Glankoff, executive vice president for marketing and public affairs for Sea Research Foundation, has left Sea Research and Mystic Aquarium. Although he’s moving out of state, he wrote in an email that he expects to remain connected to Sea Research Foundation. He could not be reached for comment. Glankoff was at Sea Research for seven years, and for 10 years prior to that he was the director of marketing and communications at Mystic Seaport. A resident of Ashaway, he serves on Stonington’s Economic Development Commission as an alternate representing Stonington’s tourist interests.At the Mystic Seaport, J. Barclay Collins II is the new chairman of the museum’s board of trustees. Collins was elected by the seaport’s membership at the annual meeting on Sept. 27. Collins recently retired as the executive vice president and general counsel of Hess Corporation. He also serves as the chairman of the board of the United Hospital Fund of New York and is on the board of the New York Botanical Garden, among other philanthropies. An avid sailor, he is a member of the New York Yacht Club and the Shelter Island Yacht Club. Collins has homes in New York, Connecticut and Florida, and first joined the Mystic Seaport in 2008.“We are very excited to have Barclay assume leadership of the board,” President Steve White said. “He brings a level of professional expertise, institutional knowledge, and a passion for our mission that will help us succeed at developing new and exciting ways for the public to explore our collections and understand the importance of our shared maritime heritage.”Collins succeeds Richard Vietor as chairman.The museum also welcomed four new trustees to the board: Grant Cambridge, of Pasadena, Calif., is a senior vice president and a portfolio manager of Capital Group in Los Angeles; Sheila McCurdy, of Middletown, R.I., has an extensive background in sailing and is well known in the U.S. racing and cruising communities; Cayre Michas, of New York City and Stonington, has long been involved with nonprofit and educational institutions and is a trustee and secretary for Learning Leaders Inc.; and Waring Partridge, of New Haven, is the president of the Partridge Family Office and a former senior executive in the telecommunications industry.