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Schellman began as a SOC audit firm 20+ years ago. While we still issue more than 2,000 SOC reports each year, our clients’ trust has propelled our expansion. Today, we offer nearly 60 types of audits and assessments delivered by full-time employees. No outsourcing. No compromises.

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Schellman is the only Top 50 CPA firm focused exclusively on IT Compliance and Cybersecurity, and we’re the #1 service provider for FedRAMP Assessments.Our industry-leading NPS scores, client retention, and employee retention (low-to-no team churn = less audit fatigue) mean our clients experience greater continuity and quality.We also understand how distracting unplanned work can be, so we focus on client-centric KPIs to help keep your business moving uninterrupted.

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SOC & Attestations

SOC & Attestations

SOC 1 / SSAE 18 Examination

SOC 2 Examination

SOC 3 Examination

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Privacy Assessments

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Federal Assessments

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Healthcare Assessments

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Cybersecurity Assessments

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Schellman Software Security Assessment (S³A)

TISAX®

SWIFT Customer Security Programme

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Crypto and Digital Trust

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Schellman Training

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Corporate Social Responsibility

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The Schellman Blog

Stay up to date with the latest compliance news from the Schellman blog.

Charles Turnbow

Charles Turnbow is a Senior Associate at Schellman. He previously served in the military as an intelligence officer before entering the civilian workforce as a strategic aerospace, intelligence, and security consultant supporting global operations within the Intelligence Community. Now at Schellman, Charles is focused on providing federal assessments.

Blog Feature

Federal Assessments

What to Expect from a FedRAMP High Assessment

By: Charles Turnbow
March 26th, 2024

If you’re considering undergoing a FedRAMP High Assessment, you must understand that this is the most rigorous baseline among the standard FedRAMP options, making it a daunting—if necessary—endeavor. What would likely help is knowing what’s coming in more detail so that you can better prepare.

Blog Feature

FedRAMP | Federal Assessments

What to Expect from a FedRAMP Moderate Assessment

By: Charles Turnbow
March 9th, 2023

If you’ve ever signed up for a race, you may have had a few options to choose from. Sometimes, there’s a 15k, a 10k, an 8k, and, of course, a 5k, which is generally the starting standard for amateur runners and/or walkers. Each option has a certain degree of difficulty, and all of them require intentional steps for completing the race successfully.

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