The award, based on employee feedback, came in 49th place out of over 800 firms that applied and were also given a two star Accreditation as an Outstanding Company to work for.
Gamma has been recognised by the Sunday times as one of the best companies to work for for the fifth consecutive year.
Each entrant into the list is judged in eight areas: leadership, wellbeing, giving something back, personal growth, fair deal and how members of staff feel towards their manager, company and team.
Gamma attended the awards dinner at Battersea Evolutions on Thursday 23rd February where they found out they achieved 49th place within the top 100 after 857 firms registered to take part.
Best Companies CEO and founder Jonathan Austin said: “I would like to congratulate Gamma on their outstanding achievement.
“This year it is encouraging to see that more and more organisations are recognising the value of employee engagement and are willing to benchmark themselves against the best to ensure the are offering their employees the best possible experience.
“Organisations like Gamma continue to focus on their employees and have been rewarded with an engaged workforce who tell us that this is a great place to work.”