Field, who was the associate director of the automotive team at Simpson Carpenter, has been appointed as automotive research director.
He has more than 12 years of automotive research experience.
Fitzpatrick has been appointed as services director. She worked as head of practice for automotive at Simpson Carpenter for six years and prior to that worked as director of syndicated research at GFK NOP.
Phillips, who worked at Simpson Carpenter as an account director, joins MM-Eye as research director, responsible for implementing new approaches to customer and client engagement.
Anne Bolingbroke, managing director of MM-Eye, said: "Talented people are hard to find. To have three of them come along at once is just fantastic for MM-Eye and, of course, our customers."