The Intersection of DFARS and NIST SP 800-171: Aligning Standards for Cybersecurity

In today's interconnected world, the realm of cybersecurity extends beyond the individual silos of any single framework or regulation. For defense contractors, understanding how different standards interplay is pivotal. The Defense Federal Acquisition Regulation Supplement (DFARS) and the National Institute of Standards and Technology (NIST) Special Publication 800-171 are two critical components of the United States' strategy to safeguard sensitive defense information. Their alignment is not coincidental but a structured approach to create a resilient defense against cyber threats.

DFARS and NIST SP 800-171: A Symbiotic Relationship

DFARS is a set of regulations that dictate how to protect Controlled Unclassified Information (CUI) within the defense industry. Meanwhile, NIST SP 800-171 provides a set of guidelines intended to standardize the way CUI is handled by non-federal entities, including defense contractors. When these two intersect, they create a comprehensive cybersecurity framework that defense contractors must navigate successfully to maintain compliance and secure defense contracts.

The Why and How of Alignment

Why Align?
The primary goal of aligning DFARS with NIST SP 800-171 is to protect national security by securing the defense supply chain. Information breaches in this sector can have far-reaching consequences, hence the rigorous standards.

How They Align
DFARS mandates that defense contractors implement the security requirements of NIST SP 800-171 as a means of ensuring the protection of CUI when processed, stored, and transmitted. Essentially, compliance with NIST SP 800-171 is the pathway to achieving DFARS compliance.

Key Components of Alignment

Adequate Security Measures
At the core of NIST SP 800-171 is the concept of “adequate security.” This term, also reflected in DFARS, implies that contractors must have security controls that are sufficient to protect CUI against potential cyber threats. These measures are comprehensive, spanning across 14 families of security requirements, from access control to system and information integrity.

Incident Reporting
DFARS stipulates a strict timeline for reporting cyber incidents: within 72 hours of discovery. NIST SP 800-171 supports this directive by detailing the types of incidents that must be reported and the mechanisms for doing so.

Flow-Down Requirements
DFARS requires prime contractors to flow down certain cybersecurity requirements to their subcontractors. NIST SP 800-171 provides the framework that these subcontractors must adhere to, creating a uniform standard throughout the supply chain.

Navigating the Compliance Journey

Assessment and Documentation
The first step in aligning these standards is conducting a thorough assessment of current cybersecurity practices against NIST SP 800-171 guidelines. Documenting this assessment, including any areas where the organization falls short, is crucial for both internal improvements and regulatory compliance.

System Security Plan (SSP)
Developing an SSP is a core requirement under NIST SP 800-171, which also aligns with DFARS expectations. This plan outlines how an organization's security controls are put into action and demonstrates a proactive stance in protecting CUI.

Continuous Monitoring and Improvement
Compliance is not a static achievement. Both DFARS and NIST SP 800-171 require organizations to monitor their security measures continuously and adjust as needed. This dynamic process ensures that the protections for CUI evolve alongside the threat landscape.

Embracing the Benefits

Adhering to these standards is not just about meeting regulatory obligations. There are intrinsic benefits:

Enhanced Security Posture: Implementing these frameworks strengthens the overall cybersecurity posture, reducing the risk of data breaches.
Competitive Edge: Being compliant can give contractors a competitive advantage in the defense market, showcasing reliability and trustworthiness.
Market Readiness: As more agencies adopt these standards, compliance ensures readiness for a broader market beyond just the Department of Defense.

Frequently Asked Questions

Are there self-assessment tools available to help with compliance?

Yes, NIST provides a Self-Assessment Handbook – NIST Handbook 162 – that organizations can use to assess their compliance with NIST SP 800-171.

What happens if a contractor is found to be non-compliant?

Non-compliance can result in a breach of contract, disqualification from current and future contracts, and potential legal and financial repercussions.

How often should a contractor review their compliance with DFARS and NIST SP 800-171?

Contractors should review their compliance at least annually or as required by their contract. It is also important to conduct reviews whenever there are significant changes to their information systems or business operations.


The intersection of DFARS and NIST SP 800-171 is where security meets standardization, creating a unified front in the protection of CUI. For defense contractors, navigating this intersection is not only about compliance; it's about contributing to a larger shield that guards national security. By aligning your practices with these standards, your business becomes a trusted link in the defense supply chain—a role that comes with both responsibility and honor.

As the cyber world continues to evolve, so will these frameworks. Staying abreast of changes and understanding how these alignments impact your operations will be key to not only surviving but thriving in the defense sector. Defense contractors that prioritize this alignment are not just preparing for the future; they are actively shaping it.

Backed by an award-winning cyber security and IT management team, On Call Compliance Solutions is the #1 source for CMMC, NIST SP 800-171 Compliance, DFARS and ITAR consulting. Give us a call now to schedule a free phone call with one of our compliance experts to see how we can help.

NIST SP 800-171 Compliance Experts


Fill out the form below to get a FREE consultation with one of our CMMC, NIST SP 800-171, DFARS and ITAR experts who can help you achieve your goals. There is never a fee or obligation to find out how we can help.

Contact Us