Mark Silvaggio Named Partner | Tax & Advisory | GBQ | Ohio CPA Firm

GBQ, a Top 100 tax, accounting and consulting firm, is pleased to announce the promotion of Mark Silvaggio, CPA, JD, to Partner, Tax & Advisory.

Mark joined GBQ in 2025 and is an experienced tax leader with more than 17 years of experience in corporate and partnership taxation and more than 10 years of experience leading teams of tax professionals. Mark began his career with PwC, spending 15 years at the Big 4 accounting firm providing top-quality corporate tax services to a broad array of clients, varying in size and industry.

“Mark embodies the caliber of leadership, technical excellence, and client commitment that defines GBQ. His extensive experience advising complex corporate and partnership tax clients, combined with his ability to build and lead high-performing teams, has already made a significant impact on our firm. We are fortunate to have a professional of Mark’s stature helping drive the continued growth and success of our tax practice,” said Tim Schlotterer, CPA, Partner, Tax & Advisory at GBQ.

Mark specializes in U.S. federal taxation across industries, including private equity, services, construction, manufacturing, distribution, software, and insurance (carriers and brokers). Mark works primarily in corporate and partnership tax compliance and consulting, including expertise in tax accounting (ASC 740), purchase accounting, qualified small business stock (Section 1202 QSBS), and multistate income taxation.

Mark graduated cum laude from Miami University in Oxford, Ohio, with a B.S. in Accountancy, and later graduated magna cum laude from Case Western Reserve University School of Law in Cleveland, Ohio, with a juris doctorate (JD), concentrating in Business Organizations.

About GBQ

At GBQ, our purpose is clear: we empower growth; growth of our people, our communities, and our clients’ businesses. A top tax, accounting, and consulting firm for 70 years, we’re driven by the outcomes that we know can change the lives of those we work with and for. We’ve learned that this is what matters most to our stakeholders. It is this purpose that drives and inspires us every day. Visit GBQ online at www.GBQ.com or follow us on LinkedIn and Instagram.