Building a Cybersecurity Culture: Training Your Workforce for CMMC Success

Technology Alone Will Not Pass Your Assessment

Defense contractors preparing for CMMC Level 2 certification typically invest heavily in technology: firewalls, SIEM platforms, endpoint protection, MFA, and encryption. All of that is necessary. But none of it matters if your employees click on phishing emails, share passwords, or walk out the door with CUI on a personal device.

CMMC assessors know this. That is why the Awareness and Training (AT) domain is built directly into the framework. A workforce that does not understand security risks is a liability, regardless of how much you have spent on tools. Building a genuine cybersecurity culture is not optional for CMMC success. It is foundational.

What CMMC Requires for Security Awareness Training

CMMC Level 2 includes two specific Awareness and Training controls drawn from NIST SP 800-171:

• ✓AT.L2-3.2.1: Ensure that managers, system administrators, and users of organizational systems are made aware of the security risks associated with their activities and of applicable policies, standards, and procedures.
• ✓AT.L2-3.2.2: Ensure that personnel are trained to carry out their assigned security responsibilities.

These controls require more than a once-a-year video module. Assessors want to see a documented training program with records showing who completed training, when, and what was covered. Role-based training for system administrators and other personnel with elevated access is expected in addition to general awareness training for all staff.

Training must be ongoing. A workforce that received security awareness training two years ago and nothing since does not meet the standard.

The Insider Threat Problem in the Defense Industrial Base

Insider threats represent one of the most significant and underestimated risks in the defense industrial base. CISA's insider threat mitigation resources provide a useful framework for building awareness programs tailored to defense contractor environments. An insider threat is not always a malicious employee. It includes well-meaning staff who mishandle CUI because they do not understand the rules, use unapproved tools for convenience, or fail to report suspicious activity they witness.

CMMC assessments increasingly examine how access is controlled, monitored, and reviewed across systems that store CUI. Insider threat awareness training directly supports compliance with access control, audit logging, and incident reporting controls across multiple CMMC domains.

Key insider threat topics your training program should cover:

• ✓CUI handling rules: What CUI is, where it can be stored, how it can be shared, and what happens if it is mishandled.
• ✓Access control hygiene: Why least-privilege access matters, how to request access changes, and why sharing credentials is a serious violation.
• ✓Reporting obligations: How to report suspected data mishandling, suspicious behavior, or potential security incidents without fear of retaliation.
• ✓Physical security: Clean desk policies, visitor escort procedures, and the risks of discussing sensitive information in public spaces.

Social Engineering: The Threat Your Firewall Cannot Stop

Social engineering attacks, including phishing, spear-phishing, vishing, and pretexting, remain the most common initial attack vector against defense contractors. Adversaries, including sophisticated nation-state actors, specifically target the human layer because it is often the weakest link in an otherwise well-secured environment.

Defense contractors in the DIB are high-value targets. Nation-state groups from China, Russia, Iran, and North Korea actively conduct social engineering campaigns against defense supply chain companies to gain access to CUI, intellectual property, and insider information about defense programs.

An effective social engineering awareness program should include:

• ✓Phishing simulations: Regular, realistic test campaigns that give employees safe experience identifying malicious emails and links.
• ✓Reporting culture: Make it easy and expected for employees to report suspicious emails or calls without embarrassment. A workforce that reports suspicious activity is an asset.
• ✓Scenario-based training: Walk employees through real attack scenarios relevant to your industry and role types. Abstract training about hackers does not change behavior. Realistic examples do.
• ✓Leadership modeling: When executives and managers take security training seriously, the rest of the organization follows.

Building a Training Program That Actually Works

A CMMC-compliant security awareness training program does not have to be expensive or time-consuming to be effective. The most important elements are consistency, documentation, and relevance.

• ✓Conduct training at onboarding and at least annually for all staff, with additional sessions when significant threats emerge or policies change.
• ✓Provide role-specific training for system administrators, finance staff, and anyone with elevated CUI access.
• ✓Document everything. Training completion records, curriculum content, and attestations are all evidence your assessor will want to see.
• ✓Use real examples from the defense industrial base. Training that references actual attacks on companies like yours gets attention in a way that generic content does not.
• ✓Test your workforce with phishing simulations and use the results to identify departments or individuals who need additional support. Small contractors can offset the cost through the CMMC Grants program.

According to a GAO report from March 2026, the DoD aimed to have approximately 113,000 acquisition workforce members complete security awareness training within one year of the CMMC program launch. That figure underscores how seriously the government is taking the human side of cyber defense. Your organization should take it just as seriously.