Sean Whelan
Managing Director CA

Sean is One Advisory’s steady hand and strategic mind. A Chartered Accountant with over 20 years’ experience, he’s known for guiding clients through growth and change with clarity and confidence.

Off the clock, you’ll find him behind the wheel of his historic Brabham BT30 — a nod to his love of motorsport. While he enjoys the thrill of racing, he never takes risks with your finances.

Sean’s approach is calm, considered, and focused on achieving long-term results, helping businesses and individuals plan more effectively and achieve greater success.

Professional background
Bachelor Accountancy – University of SA; Membership of Chartered Accountants Australia and New Zealand

Sean Whelan