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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.

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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 mean our clients experience greater continuity and quality.

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SOC & Attestations

SOC & Attestations

SOC 1 / SSAE 18 Examination

SOC 2 Examination

SOC 3 Examination

SOC for Supply Chain

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SOC Essentials for Early-Stage Companies

C5 Attestation

CSA STAR Programs

Payment Card Assessments

Payment Card Assessments

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PCI SSF

PCI P2PE Validation

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ISO Certifications

ISO 27001

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ISO 20000-1

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Privacy Assessments

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GDPR Assessment

International Privacy Assessments

US State Privacy Assessments

Microsoft SSPA/DPR Assessment

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EU Cloud Code of Conduct

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Federal Assessments

FedRAMP®

CMMC / NIST SP 800-171

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FTC Consent Decrees

DoD IL6

Healthcare Assessments

Healthcare Assessments

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Penetration Testing

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Cybersecurity Assessments

Cloud Configuration Assessments

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NIST Cybersecurity Framework Assessments

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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Leadership Team

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Corporate Social Responsibility

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Strategic Partnerships

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The Schellman Blog

Nick Rundhaug

Nick Rundhaug is a Managing Director and Federal Practice Leader with Schellman. Nick has over 20 years of experience in the information technology field with 15 years’ experience in Federal frameworks for information technology. With a background as a network engineer and assessor, Nick specializes in the areas of cryptography, networking, and security mechanisms in cloud environments.

Blog Feature

FedRAMP | Federal Assessments

FedRAMP Baselines Explained: A Guide to Low, Moderate, and High Levels

By: Nick Rundhaug
April 6th, 2026

As federal agencies increasingly rely on cloud technologies to support mission-critical operations, ensuring those systems meet consistent security standards is essential. The Federal Risk and Authorization Management Program (FedRAMP) provides a standardized approach for assessing, authorizing, and continuously monitoring cloud services used by the U.S. government.

Blog Feature

FedRAMP | Federal Assessments

Your Guide to DoD IL4/IL5 Authorization: Requirements, Readiness, and Common Pitfalls Explained

By: Nick Rundhaug
January 12th, 2026

As the Department of Defense (DoD) continues to accelerate its Zero Trust strategy, organizations supporting national security missions face increasing expectations for how they secure, monitor, and manage sensitive information.

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