TROY, MI--(Marketwired - April 27, 2017) - Kelly Services (NASDAQ: KELYA) (NASDAQ: KELYB), a global leader in providing workforce solutions, will release its first quarter earnings before the market opens on Thursday, May 11, 2017. The company will host a conference call, including a question and answer opportunity, to discuss the financial results at 9:00 a.m. ET.