Former Gov. George E. Pataki has joined Chadbourne & Parke as a counsel focusing on matters involving environmental issues, particularly renewable energy.

Pataki, who served as the state’s Republican governor for 12 years before stepping down earlier this year, said in an interview Wednesday that he was drawn to 400-lawyer Chadbourne by its reputation in the area of renewable energy. The firm has been a leader in the representation of companies or investors in the areas of wind, geothermal, biomass and solar power. “I don’t think there’s a firm in the country that has more experience in the area,” said Pataki, who was a strong backer of renewable energy use while governor.