Mass. clean-tech companies that are hiring

Conservation Services Group Location: Westborough In the last six months, the energy-efficiency company has hired about 50 employees in its main office. Because of the stimulus bill as well as several new contracts, it plans to add 200 more jobs this year. The company currently employs about 400 and does business in 22 states. At least 30 to 40 of the new jobs will be in Massachusetts, he said. Careers page for Conservation Services Group

Conservation Services Group

Location: Westborough

In the last six months, the energy-efficiency company has hired about 50 employees in its main office. Because of the stimulus bill as well as several new contracts, it plans to add 200 more jobs this year. The company currently employs about 400 and does business in 22 states. At least 30 to 40 of the new jobs will be in Massachusetts, he said.

Careers page for Conservation Services Group

(Dina Rudick / Globe Staff / File 2008)