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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

SOC for Cybersecurity

SOC Essentials for Early-Stage Companies

C5 Attestation

CSA STAR Programs

Payment Card Assessments

Payment Card Assessments

PCI DSS Validation

PCI SSF

PCI P2PE Validation

PCI PIN Assessments

PCI 3DS Compliance

ISO Certifications

ISO Certifications

ISO 27001

ISO 42001

ISO 27701

ISO 9001

ISO 22301

ISO 20000-1

ISO 14001

ISO 45001

ISO 50001

Privacy Assessments

Privacy Assessments

Global CBPR & PRP Certification

GDPR Assessment

International Privacy Assessments

US State Privacy Assessments

Microsoft SSPA/DPR Assessment

FERPA Assessment

EU Cloud Code of Conduct

Federal Assessments

Federal Assessments

FedRAMP®

CMMC / NIST SP 800-171

FISMA/NIST

ITAR

CJIS

IRAP

FTC Consent Decrees

DoD IL6

Healthcare Assessments

Healthcare Assessments

HITRUST Certification

HIPAA Compliance

HIPAA Express

EPCS-DEA Audits

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Penetration Testing

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AI Red Teaming

Cybersecurity Assessments

Cybersecurity Assessments

Cloud Configuration Assessments

Ransomware Assessments

NIST Cybersecurity Framework Assessments

Schellman Software Security Assessment (S³A)

TISAX®

SWIFT Customer Security Programme

Internal Audit Co-Sourcing

MTCS Certification

Crypto and Digital Trust

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

Dan Hamm

Dan Hamm is a Senior Manager with Schellman Compliance, LLC, based in the Philadelphia, PA area. Dan serves as a practice leader supporting Schellman's ISO, Privacy, TISAX service lines. Dan has been with Schellman since 2020, and has over 10 total years of various IT and information security audit experience supporting clients in a wide range of sectors and industries; from cloud service providers and data centers to international law firms. Since joining Schellman, Dan has been a core part of the audit teams, both as a lead auditor and project manager, for over 450 ISO certification reviews, supporting dozens of organizations in obtaining and maintaining their various ISO certifications. Additionally, Dan also supports the TISAX service line, a highly-demanded certification for organizations working within the automotive industry and its supply chain.

Blog Feature

How to Successfully Complete Your TISAX Self-Assessment

By: Dan Hamm
March 23rd, 2026

The ISA (Information Security Assessment) is the heart of your TISAX journey, and a critical first step in preparing for your TISAX assessment. You'll also hear it referred to as the “self-assessment.” The most recent iteration of the ISA spreadsheet, version 6.0.3, can be downloaded here for reference.

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