Hi, I’m Deborah Sumner, founder of SumnerCo. As a CPA, I have over 15 years of experience in finance and accounting across multiple industries spanning the US and Canada.

I’ve worked directly with founders and executive teams to implement accounting systems, streamline processes, and provide controller-level oversight that supports growth and decision-making.

I’ve lived and worked in both the US and Canada. I’ve led first-time audits, implemented revenue recognition processes, managed cap tables, and built month-end reporting, and I’ve seen firsthand how messy operations can get when the finance function is neglected in the early stages.

Career Highlights:

• Built finance teams and processes from scratch for startups, including multi-entity consolidations and multi-currency operations

• Partnered with founders, CFOs, and COOs on investor reporting, board decks, and compliance materials

• Led first-time audits and reviews

• Implemented scalable systems including accounting software, automated revenue recognition, and cap table management

• Improved operational processes, from unlimited PTO rollouts to faster month-end closes

I founded SumnerCo to bring this expertise to startups that need senior-level finance leadership without the full-time overhead. Based in British Columbia, I work remotely with clients across Canada, the US, and beyond, helping them feel confident their operations are reliable, scalable, and investor-ready.