The labor and employment specialists at Jackson Lewis have again drawn the ire of the International Brotherhood of Teamsters, with union members mustering this week outside Sotheby’s locations in New York and Philadelphia to protest the law firm’s representation of the famed auction house in an ongoing contract dispute with its art handlers.

The Tuesday protests saw Teamsters members handing out leaflets that read “Jackson Lewis Kills Jobs” and holding banners bearing such slogans as “Jackson Lewis Creates Misery for Sotheby’s Workers.” At issue: Sotheby’s three-month-old lockout of 43 art handlers represented by Teamsters Local 814, according to an International Brotherhood of Teamsters press release.