WEALTH October 17, 2025 0 Comments

Meet the Game-Changers: 40 Under 40 Accountants Quietly Disrupting the Financial World—And What They’re Doing Next Will Blow Your Mind

Ever wonder what it takes to be counted among the brightest up-and-comers in the rigorous world of accountancy? It’s not just about crunching numbers; it’s about vision, leadership, and a knack for spotting talent where others might see spreadsheets. That’s exactly why dmg media Ireland’s 40 Under 40 series shines a spotlight on game changers like Brian O’Connor, the team lead for accounting & tax at Barden. Since qualifying as a chartered accountant in 2017 and cutting his teeth with Deloitte, Brian’s journey has been anything but linear — from globe-trotting stints in Australia to guiding fresh-faced accountants through their pivotal career moves. His story isn’t just about tallying debits and credits; it’s about transforming recruitment and mentorship into a serious craft, all while keeping his competitive streak alive (he’s the reigning Barden limbo champ, after all!). Curious how passion and precision collide in the corporate jungle? Let’s dive in. LEARN MORE

dmg media Ireland has selected 40 brilliant young minds in the accountancy industry as part of the 40 Under 40 series

Brian O’Connor – team lead, accounting & tax, Barden

Brian O’Connor qualified as a chartered accountant in 2017, completing his training with Deloitte. He is a graduate of UCD, holding a Bachelor’s degree in Business & Commerce and a Master’s in Accounting.

Following his training in Deloitte, he spent some time travelling and working in Australia, gaining experience within the industry, working in financial accounting roles with Vocus Group Limited, Toll Group and Independent Cement & Lime Group.

In Barden, O’Connor leads the Recently Qualified Team across Leinster, group of four chartered accountants who now advise and guide the next generation of accountants.

A core part of his role is to work with recently qualified accounting professionals, supporting them to identify and take the very best next step in their careers.

O’Connor also plays a key role in managing relationships with talent, clients and partner organisations, including the Chartered Accountants Student Society Ireland (CASSI) and ACA Professionals.

O’Connor is an integral part of the senior leadership team in Barden, helping to redefine recruitment and talent advisory into a professional service. He is actively involved in numerous initiatives across the broader business to help amplify the voice of the teams.

While now using his qualification in a different way, he is a passionate and caring leader who gives his all to everything that he does.

40 Under 40 — Brian O’Connor, team lead, accounting & tax, Barden.

Hobbies: Travelling, running, golfing, swimming and surfing. I am also a passionate soccer fan, and I am interested in Irish history and Gaeilge. I am also the reigning Barden limbo champion – a title I am determined to keep!
Best piece of advice you’ve received: “Win the crowd and you will win your freedom” – Jonathan Olden.
Why you love your job: I particularly enjoy working with newly qualified accountants. Having reached the end of my own training contract, uncertain about what to do next, I value being in a position to help others at that same crossroads.
Motto for life: There are many ups and downs; keep a level head, don’t lose your cool when things aren’t going well and remain humble when they are.