Selendy Gay Elsberg is planning to welcome its 15th partner—a notable exception for the New York trial boutique, which has championed a homegrown approach to talent. But the forthcoming arrival of Temidayo Aganga-Williams, a senior investigative counsel for the U.S. House Select Committee to Investigate the Jan. 6 Attack, is hardly an anomaly in Big Law's hustle for talent in government-facing practices.