Your Mission is My Purpose
Welcome—I'm glad you’re here. I founded Impact Numeric because I believe every meaningful mission needs a strong financial foundation. I am committed to supporting organizations just like yours—the ones working hard to make the world a better place for everyone.
While you devote your energy to creating real-world impact, my goal is to use my skills to help further your mission. I handle the numbers so you can stay focused on the big picture.
Together, we'll build clear, manageable accounting and finance processes that give you confidence in your daily operations and long-term planning.
Meet Esther Mensah-Sullivan
I’m Esther Mensah-Sullivan, Principal Consultant & Accounting Advisor at Impact Numeric LLC. Throughout my accounting career, I have been devoted to providing specialized accounting and finance expertise exclusively to mission-driven organizations.
I believe that sound, sustainable financial management should be accessible to organizations of every size—not just large corporations. For nonprofits, fiscal clarity is essential for driving community impact. I established Impact Numeric to support nonprofit organizations with managing the complexities of fund accounting, compliance, and reporting—allowing your leadership team to focus on creating positive change beyond the numbers.
The Expertise Behind Your Financial Clarity
When you partner with Impact Numeric, you work directly with me. I bring nearly 20 years of advanced accounting and financial management experience, spanning both public accounting and private industry.
I have spent more than a decade working exclusively with nonprofits, serving as a trusted fractional partner to diverse organizations with budgets ranging from under $500,000 to more than $10 million.
I understand the unique and rigorous demands of nonprofit financial management—from tracking complex donor restrictions to maintaining functional expense ratios that safeguard public trust and funding eligibility.
Why Nonprofits Choose Impact Numeric
I design and oversee sustainable systems that turn messy data into strategic tools for your leadership and Board. I provide:
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Audit and Tax Readiness: I provide fully reconciled, CPA-ready year-end books to simplify annual audits.
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Precise Fund Accounting: I build clear ledger systems that accurately track and separate donor-restricted funds.
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Board-Ready Insights: I translate complex accounting data into clear financial narratives that help leadership and the board make informed decisions with confidence.
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Sustainable Internal Controls: I develop right-sized controls that safeguard your assets, ensure accurate reporting, and maintain donor trust without overburdening your team.
Support Tailored to Your Organization
Every nonprofit has different internal capacities. My role-based tiered structure lets you choose the support your organization needs now—whether it is a reliable Bookkeeper, a fund-focused Accountant, a strategic Controller, or an experienced fiscal Advisor.