Most Common Reasons for Security Clearance Revocation

Security clearances are critical for many roles across government and defense sectors—but they can be revoked more easily than most people realize. Join Lachlan McKinion for an in-depth webinar exploring the most common reasons security clearances are denied or revoked, and what individuals and employers can do to mitigate risk.

This session will break down the key factors that trigger clearance concerns, including financial issues, personal conduct, foreign influence, misuse of information systems, and substance use. Lachlan will provide practical insight into how adjudicators evaluate these issues under the “whole person” concept, and how even seemingly minor issues can escalate into serious clearance risks if not properly addressed.

Attendees will also learn about the clearance review and revocation process, including how cases are investigated, what rights individuals have during proceedings, and strategies for responding effectively if concerns arise. Real-world examples will help illustrate how patterns of behavior, rather than isolated incidents, often drive outcomes.

Talking Points:

• The most common causes of security clearance denial and revocation
• How adjudicators assess risk using the “whole person” standard
• The clearance investigation and adjudication process
• Best practices for maintaining clearance eligibility and addressing concerns early