Meet the team

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A versatile group of accounting professionals

As a small team, we’re completely flexible to your needs. We’re hard-working, honest, and downright friendly with everyone we meet. We surprise ourselves every day with our passion and thirst for knowledge. 

Atreus is founded on the belief that you can always drive for better – no matter what it is you do. We’ve been championing this for years, and it’s what makes us work so well.

William O’Neill B.A.

Managing Director

As the managing director of Atreus, William is in charge of business operations and structure. With over 15 years of experience in accountancy, he is well versed and knowledgeable in all areas of accounting as well as business management.

William has vast experience and qualifications in Sage computerised accountancy and has ensured that Atreus is ready for Making Tax Digital (MTD), whilst continuing to pioneer the forward vision of the company.

Len Summerson FMAAT

Senior Accounts Director

Having worked as an accountant for nearly 50 years, the majority of which owning his own practice, Len comes equipped with invaluable knowledge and experience of accounting and the financial world.

As the head of our accounts and management team, Len is the first port of call for many of our clients. He is always at hand, willing and able to help with any queries they ask of him. It is little wonder he has formed many close working relationships over his years in the industry.

We’re inspired by your success stories

Looking after a client isn’t just about delivering a service. It’s about treating them with respect, about forming a connection, and about giving them back the same trust they showed us. When we’re chosen as someone’s accountant, we feel honored with the responsibility that entails. It’s only natural that after giving it our all, our customers feel obliged to leave us a review – and they’re normally pretty good, too.