SmithAmundsen LLC added David Sethi as a partner to the firm’s construction and commercial transportation practice groups in the Chicago office.Sethi represents truckers, auto workers, retailers, manufacturers and distributors in personal injury suits against alleged violations of work and safety standards and claims of catastrophic injuries.• Keller Lenkner LLC added Jason A. Zweig as a partner to the firm’s Chicago office. He was previously at Hagens Berman Sobol Shapiro LLP.Zweig is a seasoned class …