Our difference
A firm built on one belief: the accountant should be in the room.
For too long, accountants have sat at the edge of things. Filing what they’re given, answering what they’re asked. That’s not what founders need. So we built William J differently.
What we do
We help growing industries
deliver great results
Started by William Jennings out of a shared office in Farringdon, with two clients and a fax machine that never quite worked.
We opened New York in 2018 after too many UK clients asked us to ‘just handle the American side too’. It stuck.
Fifteen years in, 112-odd clients, 26 people between two offices. We still turn work down when it isn’t a fit. That part hasn’t changed.
Why choose us
Accuracy & reliability
Simplify your finances and grow your business with proactive guidance and innovative solutions.
Our professionals offer tailored advice to optimize strategies for your business's sustainable growth.
Utilizing cutting-edge tech, we ensure seamless processes and accurate data management.
Count on us for precise reporting and analysis, providing a solid foundation for your business.
Team members
Meet the talented team
behind our services
With a passion for innovation we bring diverse expertise to every project.
Join our team
Looking for a place to grow and thrive?
Apply now and become part of our innovative team dedicated to driving meaningful change in the financial industry.