St. Mary’s Credit Union, of Marlborough, announced on Tuesday it has promoted three credit union officers to senior vice president positions.

They are Sarah Day, Armand Fernandez and Christine Monteiro.
Day, who previously served as vice president and joined the credit union in 2005, has been named senior vice president, commercial loan officer.
Fernandez, who directs the credit union’s small business lending and has been credited with leading the financial institution’s Paycheck Protection Program lending, has been named senior vice president, senior small business lending officer.

Monteiro, who previously served as vice president of retail services and joined the credit union in 2004, has been named senior vice president, branch administrator.
As of June, St. Mary’s had $946 million in assets, with branches in Marlborough, Hudson, Northborough, Westborough and Framingham.