Saturday nights are anything but typical for William Min, general counsel and executive vice president for the risk and business analytics division of RELX, which includes LexisNexis Risk Solutions and Reed Business Information.

Every other Saturday at 11 p.m., Min begins his eight-hour shift as a volunteer emergency medical technician crew chief for the Westport Emergency Medical Service in Connecticut. He typically works in Atlanta during the week and returns on the weekends to Westport, where his family lives. He’s been doing this for more than 21 years and has racked up more than 6,000 hours on the ambulance.