RPM was praised for its leadership, staff engagement and career development. It was described as having "a unique culture and commitment to unswerving core values".
"To be the only company ranking in the top 50 for five years on the trot is a fantastic achievement. It also speaks wonders for the marketing industry as a whole, with so many agencies featuring throughout the table," said RPM founding partner and CEO Hugh Robertson.
"89% of our staff say they have fun together and 82% feel that RPM is an important part of who they are; proving that RPM is a dynamic and engaging atmosphere to work in."
Other event companies mentioned in the Sunday Times Top 100 Small Companies include DRP Group and Jack Morton Worldwide.
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