A month after Wachtell, Lipton, Rosen & Katz executive compensation partner Jeremy Goldstein left the venerable Am Law 100 firm to start his own practice, the country’s most profitable shop on a profits-per-partner basis has looked outside its ranks to find a replacement in Simpson Thacher & Bartlett partner Andrea Wahlquist.

Wahlquist, 44, joined Simpson Thacher in 1997 and became a leading member of the firm’s executive compensation and employee benefits practice in New York. She was part of a team of Simpson Thacher lawyers honored by The American Lawyer as Dealmakers of the Year in 2007 for their work on behalf of longtime private equity client KKR. She left the 835-lawyer firm on May 23 of this year to take her transactional expertise to Wachtell, which saw Goldstein leave in early June.