Northwestern Ohio Administrators Inc. is moving from downtown Toledo to Holland.
The company, which serves more than a dozen unions in northwest Ohio, southeast Michigan, and northeastern Indiana, has 25 employees.
The office will close at noon today and reopen on Tuesday at 7142 Nightingale Dr. in Holland.
Nick Madden, executive vice president, said the trustees decided that moving the office would make things more efficient for the 10,000 people it serves.
The company has been in its Madison Avenue office since 1991. It moved from the former Hillcrest Hotel across the street.