American Medical Response of Massachusetts is planning to cut jobs at its Brockton and Avon facilities less than a week after the company lost out on the city of Brockton’s 911 service contract to Brewster Ambulance. The ambulance provider, which has operations throughout Massachusetts and is part of a national medical transportation chain, is only one of the victims to Brewster’s rise to prominence in the area. Fallon also lost out to Brewster for ambulance services in Quincy, though the company said it isn’t planning any layoffs. “We are looking at right now what that means for our Brockton and Avon facilities and how many people may be laid off,” said Ron Cunningham, a spokesman for AMR…Most of the impact will be felt at the Brockton 911 facility, which employs 85 people. The facility won’t shut down entirely – it will still provide transports to and from hospitals and nursing homes – but it won’t need to employ as many people.