Sustainable Long Island in Farmingdale, a nonprofit organization advancing economic development, has two promotions.
Gabrielle Lindau of Huntington, manager of communications, has been promoted to director of development and communications.
Erika Hill of Freeport, senior program coordinator, has been promoted to program manager.
Usdan Summer Camp for the Arts in Wheatley Heights has added to its senior administration team.
Andrew Navarette of Manhattan has been hired as director of development. He had a similar job at Harlem Stage in Manhattan.
Janet Oshinaya of Briarwood, Queens, has been hired as chief financial officer. She was a consultant for Mountain of Fire and Miracles Ministries in Brooklyn.
Coldwell Banker Residential Brokerage has hired several sales agents.
Elias Stavrinadis of Lindenhurst, an agent in Babylon, was with Educators Realty in Cold Spring Harbor.
Wirat Vattananun of West Islip, an agent in Babylon, was an IT operations manager at Morgan Stanley in Manhattan.
Roya Elyasian of Great Neck, an agent in Great Neck, was with Politan Real Estate in Little Neck.
Rachel Hershenhorn of Great Neck, an agent in Great Neck, was with Edna Mashaal Realty in Great Neck.
Christina Haight Gillis of Dix Hills, an agent in Huntington, was with Long Island Professional Realty in Commack.
Lorraine Lomonaco of Dix Hills, an agent in Huntington, was with Long Island Professional Realty in Commack.
Samantha Miller of Huntington, an agent in Huntington, was self-employed as a home stager.
Coach Realtors has three new hires.
Jeanne Herman of Franklin Square, an agent in Floral Park, was with Signature Premier Properties in Floral Park.
Patricia Mangan of Floral Park, an agent in Floral Park, was with Signature Premier Properties in Floral Park.