Kelly Parker was thrilled when she landed her dream job in 2012 providing tech support for Harley-Davidson's Tomahawk, Wisconsin, plants. The divorced mother of three hoped it was the beginning of a new career with the motorcycle company. The dream didn't last long. Parker claims she was laid off one year later after she trained her replacement, a newly arrived worker from India. Now she has joined a federal lawsuit alleging the global staffing firm that ran Harley-Davidson's tech support discriminated against American workers — in part by replacing them with temporary workers from South Asia. The firm, India-based Infosys...