Steven Plofker of Shirley, vice president of sales at AARCO Environmental Services Corp. in Lindenhurst, has been promoted to chief operating officer.
Jaclyn Guidice of Wantagh has been appointed assistant principal of Division Avenue High School in Levittown. She was assistant principal for instruction at Baldwin High School.
First National Bank of Long Island in Hauppauge has two new hires.
Oscar Gonzalez of Sayville, vice president and relationship manager for Suffolk, was vice president of business banking at Capital One in Melville.
Joseph Imbro of Seaford, vice president of municipal banking for Suffolk, had the same role at Citibank in Uniondale.
Jerry Siegelman of Great Neck, partner at Ruskin Moscou Faltischek in Uniondale, was elected to the board of directors of the Gold Coast Arts Center in Great Neck.
To be included in People on the Move, send information and color photos about job moves, promotions and other work achievements by fax to 631-843-2065, by email to firstname.lastname@example.org, or by mail to People on the Move, 235 Pinelawn Rd., Melville, NY 11747-4250.