Where an employee conceded that her employer had legitimate concerns about her work performance prior to firing her, she could not prove rationale for firing was pretextual.The 7th U.S. Circuit Court of Appeals affirmed a decision by Chief U.S. District Judge James D. Peterson, Western District of Wisconsin.Laura Rozumalski started out as a water resources engineer at W.F. Baird & Associates Ltd.’s Madison, Wis., office in 2010. Mark Riedel was her supervisor. For several years she was generally successful at the …