A former Standish legislator has pleaded guilty to misusing federal funds and faces up to five years in prison and a $250,000 fine.

Adam Mack, 38, pleaded guilty Tuesday in U.S. District Court in Portland.

Mack, a Republican member of the Maine House of Representatives between 1997 and 2000, was an officer in the Portland-based property management firm Chartwell Management Co., according to a statement from U.S. Attorney for New Hampshire John P. Kacavas.

The company managed several multi-unit residential properties including Barron’s Hill apartment complex in Topsham. The property was purchased with mortgage loans subsidized by the Department of Agriculture’s rural development program.

In January 2007, the company used $384,000 that was supposed to be security for the loan to pay unrelated expenses on other properties that Mack and his family had an interest in, the statement said.

Mack, who surrendered his passport, is expected to be sentenced within three months. The prosecution stemmed from an investigation by the Office of the Inspector General of the USDA.