Chicago—B2b agency Slack and Co. announced the hiring of Gayle Novak as partner-executive account director and Matt McKee as chief strategist-account director. Novak was previously exec VP-executive account director at social media agency Zocalo Group, Chicago. She resumes a role she had at Slack and Co. before leaving that agency two years ago. McKee was previously president at the McKee Group, Chicago. His position is a newly created role at the agency.