Accurate, Transparent, and Mission-Aligned Financial Leadership
At TSS Advisors, we partner with nonprofit organizations to deliver clarity in compliance, confidence in reporting, and peace of mind in financial stewardship. Our team understands the complex regulatory environment nonprofits operate in—and we’re here to help you thrive in it.
The Nonprofit Sector at a Glance
Nonprofit organizations play a vital role in community wellbeing, education, healthcare, the arts, and countless other missions. But managing a nonprofit’s financial operations requires navigating strict compliance, tight budgets, and donor expectations—all while staying true to mission.
Why TSS Matters Here
With decades of experience serving 501(c)(3)s, private foundations, and community-based organizations, TSS brings unmatched insight into nonprofit tax law, grant funding accountability, and financial transparency. Our team holds Yellow Book certifications and excels at guiding mission-driven clients through audits, 990 prep, and strategic financial decisions.
What Sets TSS Apart
- Specialization in Nonprofit Financial Management
- Yellow Book Certified Audit Team
- Partner-Level Engagement with Every Client
- Regional Understanding of Community-Based Organizations
- Proven Continuity and High Retention Rates
Services for Nonprofit Organizations
- Audit & Attest Services: Ensure financial transparency and build stakeholder trust.
- Yellow Book & Single Audit Compliance: Meet government and grant compliance requirements with confidence.
- Form 990 Preparation: File Form 990 accurately and on time while clearly communicating your mission.
- Grant Audit Support: Navigate grant-specific compliance with proactive guidance and documentation.
- Board Reporting & Advisory: Deliver insights that empower strong governance.
- Internal Controls & Risk Assessment: Strengthen organizational resilience and safeguard funds.
- Financial Planning & Budgeting: Improve financial forecasting and alignment with program goals.
- Outsourced CFO & Controller Services: Access nonprofit-experienced financial leadership without the overhead.
Who We Serve
We support nonprofits of all sizes, including: – Community organizations and 501(c)(3)s – Independent schools – Health and human services organizations – Arts and cultural institutions – Private foundations and charitable trusts
Typical needs include audit readiness, grant accountability, budgeting, and long-term financial planning. Many are preparing for growth, new funding cycles, or leadership transitions.
Our Approach
1. Understand the Mission
We start by learning your mission, funding model, and compliance landscape to ensure our services align with your goals and stakeholders.
2. Customize the Engagement
Whether you need a full Yellow Book audit, assistance with Form 990, or ongoing strategic guidance, we tailor our support to meet your specific needs.
3. Advise and Support
We don’t disappear after an audit. TSS stays engaged to answer questions, support your team, and provide timely insights as your organization evolves.
Why TSS?
We’re proud of our roots in Northern New England and even prouder of the nonprofit clients we support across the region. Our mountain-inspired logo reflects our commitment to helping mission-driven organizations rise with clarity and strength.
TSS was honored with the Ascend Culture Award for creating an environment where our team—and our clients—thrive. With high employee retention and a collaborative pod-based service model, you’ll get consistency, responsiveness, and deep expertise. We’re also a strategic fit for mission-aligned M&A opportunities in the nonprofit space.
Meet the TSS Nonprofit Team
Amber McGonis - Partner
Amber joined Tyler, Simms & St. Sauveur in 2008 after earning her Bachelor’s degree from Bryant University. She is one of the leaders of our audit and accounting team and oversees all of our Yellowbook and Uniform Guidance work. Amber specializes in not-for-profit organizations, independent schools, and closely-held R&D companies. She is a member of both the AICPA and NH Society of CPAs. Amber is a native of Plainfield, NH and now lives in Lebanon with her husband, Mark, and their two daughters, Madison and Reagan.
Kyle Potter - Partner
As a member of TSS’s Assurance and Accounting team, Kyle works with a broad range of commercial and not-for-profit entities in various industries, including service providers, independent schools, manufacturing, and summer camps. Kyle also has extensive experience in audits of employee benefit plans.
Kyle joined TSS in 2011 after graduating from St. Michael’s College with a Bachelor of Science degree in Accounting. He is a member of the AICPA and the NHSCPA.
Originally from Vermont, Kyle and his family reside in Grantham, New Hampshire.
Let’s Talk
Let’s build a better financial future for your nonprofit.
Reach out to schedule a consultation with our nonprofit advisory team.
