From the article you linked:
Kelly Rindfleisch was convicted of illegal campaign activity . . . while on the clock and being paid to administer state services. Sentenced to six months in jail. Walker’s deputy chief of staff.
Tim Russell was convicted to two years in prison for stealing more than $20,000 from a nonprofit group Walker put him in charge of. A deputy chief of staff.
Darlene Wink was found guilty of engaging in campaign work for Walker’s 2010 gubernatorial race while on county time. Received a year of probation. Constituent services director.
Kevin Kavanaugh was found guilty of embezzling more than $51,000 in donations intended for military veterans and their families. Sentenced to two years in prison. Former Walker appointee served on the Milwaukee County Veteran Service Commission (not a Walker campaign staff).
Bill Gardner . . . violated campaign finance laws by laundering tens of thousands of dollars for Walker’s first gubernatorial campaign. Sentenced to two years of probation. Former president of Wisconsin & Southern Railroad (not a Walker campaign staff).
Brian Pierick sent lewd text messages to a 17-year-old boy. Community service and a $2,100 fine. “Partner” of Tim Russell. Was, for a time, listed as the registrant for Walker’s gubernatorial website.