A Queens man who worked in the Hicksville office of a security company faces larceny and other charges Wednesday in the theft of paychecks from 18 co-workers, prosecutors said.

Robert Simmonds, 56, of Springfield Gardens, diverted about 39 paychecks totaling $21,198.30 into his bank account between March 28 and Aug. 8, 2014, the Nassau district attorney's office said.

He was scheduled to be arraigned Wednesday afternoon on third-degree grand larceny and 10 counts of second-degree criminal possession of a forged instrument.

Simmonds, a supervisor, had worked for the company for seven years before he was fired, prosecutors said.

The theft was uncovered when an employee told company officials that he never got several of his paychecks during a 15-month period, authorities said.

Company officials discovered two more employees had not gotten their paychecks and reported that records show the missing paychecks were placed into an account with Simmonds' name, authorities said.

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After the company contacted the district attorney's office, investigators there and the U.S. Postal Service found an additional 15 workers had the same problem, officials said.

The district attorney's office declined to name the company, based in the United Kingdom.

Simmonds' attorney could not be immediately reached for comment.