How to become a SOC 2 auditor: the path for CPAs
Performing SOC 2 examinations sits at the intersection of CPA attestation and IT audit. Here is a realistic look at the licensure, experience, and credentials that get a practitioner there.
The license is the foundation
A SOC 2 report is a CPA's attestation opinion, so the path runs through CPA licensure rather than around it. That means the familiar requirements: typically a bachelor's degree plus enough additional coursework to reach 150 credit hours, passing the Uniform CPA Examination, and meeting your state board's experience requirement under a licensed CPA. You do not personally need to be the signing CPA to work on a SOC 2 engagement, since technical specialists contribute heavily, but the report itself must be signed by a licensed CPA at a CPA firm. For someone starting from scratch, reaching the point of leading and signing SOC 2 engagements realistically takes several years, while an existing CPA or seasoned IT auditor can often transition in one to two years of focused work. Understanding this division, that a team performs the work but a licensed CPA owns the opinion, shapes every career decision that follows.
Learn SSAE 18 and the Trust Services Criteria cold
The technical core of the job is the attestation framework and the criteria you test against. SOC examinations are governed by SSAE 18, codified in the AT-C sections, which define how you plan the engagement, evaluate management's description and assertion, gather evidence, and report. On top of that sits the AICPA's Trust Services Criteria, organized around the security common criteria plus the optional categories of availability, processing integrity, confidentiality, and privacy. A competent practitioner can translate a vague control objective into a testable procedure, distinguish a Type 1 design opinion from a Type 2 opinion on operating effectiveness over a period, and recognize when a control gap warrants a qualified opinion. This is also where the AICPA's quality management regime matters, since engagements must be performed within the firm's documented system of quality management under SQMS 1, effective December 2025.
Get real IT audit and attestation experience
You cannot learn this work from a textbook; competence comes from testing controls, interviewing engineers, reviewing change management and access logs, and navigating ambiguous client situations. Most practitioners build that experience in IT audit, internal audit, risk advisory, or assurance practices, ideally with direct time on SOC 1 or SOC 2 engagements under an experienced reviewer. Time spent close to the technology stack pays off, because SOC 2 testing reaches into cloud configurations, identity and access management, logging, vulnerability management, and vendor risk. Aim to work alongside a licensed CPA who can mentor you through the judgment calls that separate a defensible opinion from a checklist exercise. The goal is fluency in both the accountant's discipline of evidence and documentation and the engineer's understanding of how modern systems actually fail.
Credentials that strengthen the profile
While the CPA license is what ultimately authorizes the opinion, IT-focused certifications make a practitioner more credible and more effective on SOC 2 work. The CISA (Certified Information Systems Auditor) is widely regarded as the benchmark for IT audit and maps closely to day-to-day SOC 2 testing. The CISSP signals depth in security architecture and operations, and the CRISC speaks to IT risk management, both of which help when assessing complex environments. None of these replace the CPA requirement to sign a report, and conversely a CISA alone does not authorize someone to issue a SOC 2 opinion; they complement rather than substitute. The strongest SOC 2 teams pair CPAs who own the attestation with technical specialists who hold these security and IT-audit credentials.
Working at, or building, a firm that can issue reports
Because only a CPA firm can issue a SOC 2 report, your career either runs through an existing firm with a SOC practice or through building one. Joining an established assurance or IT-audit practice is the fastest route to real engagements, mentorship, and the peer-reviewed quality infrastructure already in place. If you intend to start your own firm, you take on responsibilities beyond technical skill: registering and licensing the firm, designing a compliant system of quality management under SQMS 1, and enrolling in the AICPA Peer Review Program. SOC 1 and SOC 2 engagements are must-select items in a firm's peer review System Review, so your SOC work will be examined by an external reviewer on a recurring cycle. Treating peer review and quality management as core operating commitments, not afterthoughts, is what lets a firm credibly stand behind the reports it signs.