Running SOX with SOC 2 and ISO 27001: re-use the evidence you already have

If you already hold a SOC 2 or certify ISO 27001 and you are now facing SOX, you are not starting from zero. A large part of SOX ICFR is entity-level and IT control work you have already done, and the frameworks line up more neatly than most teams realise.

The COSO-to-SOC 2 spine

SOC 2's common criteria CC1 to CC5 are, almost exactly, the seventeen COSO 2013 principles re-expressed for a service organisation. Control environment is CC1, communication and information is CC2, risk assessment is CC3, monitoring is CC4, and control activities is CC5. That gives SOX a clean, principle-by-principle crosswalk to your SOC 2 evidence.

IT controls through one hub

COSO principle 11 is general controls over technology, which is exactly the ITGC domain that SOX, SOC 2 (CC6 to CC8) and ISO 27001 (Annex A) all test. Compliance One runs ITGC as a dedicated hub, so your access reviews, change management and backups are tested once and related to each framework, including SOX, rather than re-gathered.

The honest caveat: re-scope, do not rubber-stamp

A crosswalk is a scope overlap, not a free pass. SOC 2 and ISO evidence is gathered for a security objective; before you rely on it for SOX it must be re-scoped to the financial-reporting objective, and an ISO control that proves design still needs operating-effectiveness evidence over a period for SOX. The platform saves the collection effort; the judgement about sufficiency stays with you and your auditor.

You have done more of SOX than you think. The trick is re-using that evidence honestly, re-scoped to financial reporting.