Who We Are
Experienced Nonprofit CPAs Serving Small and Mid-Sized Organizations Nationwide
At Mullins P.C., we are a team of experienced nonprofit CPAs and professionals who share a deep passion for strengthening the nonprofit community. We believe that smaller organizations play an outsized role in making the world a better place, and they deserve the same quality of financial expertise as their larger peers.
Our firm was founded with one clear purpose: to help nonprofits operate with confidence, transparency, and sustainability. We bring decades of experience in nonprofit audit, tax, and advisory services, combining technical excellence with genuine care for the missions our clients serve.
We view our work not just as auditing and tax preparation, but as impact. Every accurate audit, every thoughtful Form 990, and every advisory engagement helps our clients tell their story more effectively and continue their essential work. When our nonprofit clients thrive, communities thrive and that’s why we do what we do.
Meet the Team
Jorge Diaz, CPA - Partner
Steve Marconi, CPA - Partner
Leila Aqui, MBA
Susan Berezovsky, CPA
Robert Broski, MBA
Julio A. Garriga, CPA, CGMA
Haley Henning, CPA
Allyson Horr
Walter Neel
Steve C. Roiland, CPA, CFE
Anne Soriano, CPA
Tiffany Sturtz, CPA
Our Services
Nonprofit Audit, Tax, and Advisory Services
At Mullins, P.C., we provide three focused service areas: audit and attestation, Form 990 tax preparation and compliance, and advisory and consulting services for nonprofits. This intentionally narrow service offering allows us to bring deep expertise, efficiency, and insight to every engagement.
Because we specialize exclusively in the nonprofit sector, we understand the technical accounting standards, IRS requirements, and operational realities that shape your organization. Our goal is to simplify the complex by delivering clear, accurate, and actionable results every time.
From preparing audited financial statements to helping your team navigate Form 990 or strengthen internal controls, our services are designed to support both compliance and growth. With Mullins, P.C., you gain a partner that brings nonprofit accounting expertise, modern technology, and a passion for your mission, all focused on helping your organization operate with confidence and clarity.
Where Mullins P.C. Helps People
- States Where MPC Employees Live and Work
- States Where MPC Employees Operate
Our Clients
We Serve Nonprofits Nationwide
We serve 600+ small and mid-sized nonprofit organizations across the country, including charities, foundations, associations, and membership organizations that are making a real difference, often with limited staff and resources. Being fully remote is what makes that reach possible, letting us work with inspiring organizations nationwide.
Our clients choose Mullins, P.C. because they want a trusted nonprofit auditor and advisor who truly understands their world. They value communication, collaboration, and a team that sees them as partners, not just engagements. We take the time to understand each organization’s mission, programs, and funding model, so our feedback is always relevant and practical.
By focusing on nonprofits exclusively, we’ve built a practice where clients can count on consistency, transparency, and meaningful insight. We don’t just check the boxes, we help our clients strengthen their financial foundations so they can keep changing the world.
Careers at Mullins, P.C.
People choose to work at Mullins, P.C. because we’re redefining what it means to build a career in public accounting. We’ve eliminated outdated practices like tracking every billable hour and built a fully remote culture focused on excellence, balance, and purpose. That approach helped earn Mullins, P.C. recognition as one of Accounting Today’s 2026 Best Accounting Firms to Work For.
Our professionals are drawn to our mission: to be the best nonprofit CPA firm for our clients by focusing on quality, relationships, and impact. We emphasize collaboration, communication, flexibility, and the satisfaction of truly helping mission-driven organizations succeed.