. . . Laura Whiting has joined Gardere Wynne Sewell as an environmental partner in the firm’s Dallas office. She will assist clients with all aspects of compliance and permitting for heavily regulated industry and real estate development.

. . . Benjamin L. Leffler and Jack J. Stone have joined Winstead as associates in the firm’s Dallas office. Leffler and Stone are in the real estate practice group, and Stone also is in the real estate finance group.