Table of Contents

• ​Introduction

• ​Overview of Authorization to Operate (ATO)

• ​Security Control Baseline Selection

• ​Container Hardening

• ​DevSecOps Platform Setup

• ​DevSecOps Baseline Evidence Automation

• ​Preliminary ATO Documentation Generation

• ​Conclusion

• Appendix A - ATO Readiness Task List

• Appendix B - RMF Reforms on the Horizon

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Introduction

If you’re building defense software, one question eventually eclipses everything else: How do you get your code approved to actually run there? Not in a lab, not in a demo, but in a real, operational environment with real users and real data. That “authorization” process can stall even solid engineering efforts. Not because the software is bad, but because developers are handed a pile of unfamiliar security and compliance requirements, a forest of acronyms, and a documentation burden that seems disconnected from day-to-day engineering work.

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This guide is for technical leads and software engineers who need to support the Authorization to Operate (ATO) process. You don’t need to memorize every framework or form, but you do need to understand how to move through the process with minimal wasted effort. After reading this guide, you will know the following:

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• How authorization decisions are actually made: What reviewers and Authorizing Officials are evaluating, and how RMF authorization differs from CMMC and FedRAMP.

• How to define the right system boundary and control baseline: So you don’t accidentally take on responsibility you could have inherited.

• What technical evidence really matters: Containers, SBOMs, scans, STIG compliance, and traceable build artifacts.

• How to inherit as many controls as possible from platforms and hardened bases: Instead of re-implementing security controls yourself.

• How to start assembling an authorization package that supports a coherent risk story: Not just a pile of disconnected reports.

• Practical engineering steps: Container hardening, Big Bang inheritance, compliance-as-code tooling, and automation strategies that reduce approval time.

 

The goal is not perfection; the goal is to reach authorization as quickly as possible with defensible evidence and minimal unnecessary scope.​​