Former bid development director David Gray will replace MD Andrew Morrison, who founded the North Berwick firm in 2014.
Morrison will step into the position of business development director.
The appointment comes as AM Bid looks to drive expansion after this week opening the doors to its new Edinburgh headquarters.
AM Bid now generates close to £1 million annual turnover.
Gray, who joined the company in 2016 from EDF Energy, said: “I knew that Andrew had spotted a gap in the market when he set the business up and that there would be demand for our services.
“When I joined, we had four staff in total. I was determined to help us grow and become more established in our key markets, so it is very satisfying to now have a staff team of ten, a new office in Edinburgh and an established client base across a broad range of sectors.”
“I will lead on bringing in new work to help us to further grow and scale.”