Jet Support Services brought in Neil Book as co-president and promoted JSSI veteran Susan Marr to co-president. They will share leadership roles delineated by the company’s core areas of operations. Book will be responsible for sales, marketing and technical services operations while Marr will lead the legal, human resources, client services and office services teams. Book joins the company from Juniper Networks, where he was vice president of mobility. Marr has been JSSI’s chief administrative officer and general counsel since 2002.