Glenn L. Martin, CPA

Assurance, tax and consulting services for middle market leaders

Certified public accountant in Columbus, OH (show on map)

RSM US LLP provides assurance, tax, and consulting services to middle market businesses, focusing on digital transformation and global technical resources.

Call (614) 456-2763

Navigate to Visit website

About

RSM US LLP, a subsidiary of RSM International, delivers comprehensive assurance, tax, and consulting services tailored to the evolving needs of middle market companies. With a global network spanning 120 countries and a workforce of over 17,900 professionals, RSM US LLP leverages cutting-edge technology and deep industry expertise to help clients navigate complex business challenges and drive sustainable growth.

Global network spanning 120 countries

Over 17,900 professionals

Leadership in middle market advisory

Innovative use of AI and technology

Services

Assurance

Audit, assurance, and advisory services to ensure financial integrity and compliance.

Independent audit Risk assessment Compliance reporting

AI, Data and Infrastructure Services

Leveraging AI and data analytics to optimize operations and decision-making.

Generative AI Data analytics Cloud migration

Business Tax Advisory

Tax planning and compliance services for businesses.

Tax strategy Compliance reporting International tax

Family Office Services

Tailored wealth management and advisory services for family offices.

Investment management Estate planning Risk management

Financial Consulting

Strategic consulting to enhance financial performance and growth.

Business strategy M&A advisory Capital optimization

Managed Services

Outsourced solutions to streamline operations and reduce costs.

Process automation HR outsourcing IT support

Credentials & Certifications

5th largest accounting firm in the U.S.

Since 2026

17,900+ professionals

Since 2026

120+ countries through RSM International

Since 2026

Founded in 1926

Since 1926

Frequently Asked Questions

What industries does RSM US LLP serve? +

RSM US LLP serves a wide range of industries including business and professional services, consumer products, federal government, financial services, gaming, health care, industrials, life sciences, nonprofit and education, private clients - individuals, private clubs, real estate, state and local government, and technology, media and telecommunications.

How can RSM US LLP help with cybersecurity risks? +

RSM US LLP provides cybersecurity consulting services, including risk assessment, governance, identity controls, and AI-driven security frameworks, helping middle market companies manage rising cybersecurity threats.

What is the Middle Market Business Index (MMBI)? +

The Middle Market Business Index (MMBI) is an annual research initiative by RSM US LLP that surveys senior executives to gauge middle market sentiment, revenue and earnings expectations, and strategic priorities.

What is the RSM US Foundation's role? +

The RSM US Foundation focuses on empowering youth and preparing the next generation for an evolving workforce and economy, having contributed $58.8 million to date.

How does RSM US LLP support digital transformation? +

RSM US LLP embraces digital tools and AI to enhance client experiences and provide digital solutions, enabling businesses to navigate complexity and drive progress.

What is the RSM Classic experience? +

The RSM Classic experience is the firm's ultimate client experience, combining deep industry expertise with a personalized approach to deliver comprehensive advisory services.