Building from high momentum in the alternative energy space, Sidley Austin has added a former office leader and renewable energy transactions partner from Allen & Overy in Los Angeles.

The firm on Monday announced the addition of Andrea Lucan—who counsels sponsors and oil and gas companies, among others on M&A, financing and purchase agreements relating to alternative energy—as a partner in its energy, transportation and infrastructure practice. A Sidley leader called her “one of the finest solar and clean air lawyers in the world.”