For teams dealing with EBA outsourcing under FedRAMP, there’s no room for guesswork. The High Baseline is the most demanding tier — over four hundred security controls that leave no blind spots. Every vendor, every subcontractor, every outsourced function has to meet the same level of rigor you already apply in-house.
EBA outsourcing guidelines make this harder than it sounds. The rules demand continuous monitoring, strict access controls, encrypted data at rest and in transit, and clear incident response plans. If a partner can’t produce detailed audit logs, demonstrate compliance, and pass penetration testing at a FedRAMP High standard, they can put your entire authorization in jeopardy.
Start by classifying workloads and data before they ever leave your boundary. Identify all external providers that touch systems processing FISMA High data. Validate that their SSPs (System Security Plans) map one-to-one with FedRAMP High controls. Demand proof of their ATO (Authorization to Operate) status or documented equivalency. Keep evidence fresh — stale attestations are a liability.
Isolation matters. Network segmentation, dedicated encryption keys, and least privilege access are not optional. Boundary diagrams should be up to date and reflect actual architecture, not just an idealized plan. Change control must be auditable in real time.