According to Marlborough attorney Stephen Morte, his client, Diane Lachapelle, will sue SPS in a wrongful termination lawsuit.
Morte said the suit, which will be out of Middlesex Superior Court, has yet to be served.
"I was very unhappy when I left. I was heartbroken, absolutely heartbroken," said Lachapelle, who had the same position when Dr. John Brackett was superintendent with SPS. "(Dr. Brackett) really cared about the system. I was sad to see him go. That was a good man I worked for."
Lachapelle said she and Brackett worked together at SPS for 6 1/2 years. She said she was terminated on Nov. 14, 2011.
When reached for comment, Wilson said she could not discuss the personnel matter because it was confidential.
"We’re an organiztion of over 400 employees, and typically from time to time issues arise," she said. "We follow all procedures and all the laws regarding employee matters and discipline."
SPS has claimed this is not true, but has yet to say why she lost her job.