Martin Brennan

As CEO and Founder of Onside, Martin leads a team of accounting and tax professionals who specialise in guiding high-growth tech startups through their financial journeys. With a strong focus on mentorship and team development, he is passionate about shaping the next generation of professionals to ensure lasting impact for clients and the industry alike.

Alongside his work at Onside, Martin serves on the Advisory Board of Apron, a Series B FinTech backed by $30 million in funding in 2024. Apron is streamlining bookkeeping and payments for small businesses, using advanced technology to bring greater efficiency to SME finance operations.