Command Senior Enlisted Leader Assignment

A command senior enlisted leader (often abbreviated CSEL) is the highest‑ranking enlisted service member in a specific command or organization. They serve as the senior enlisted advisor to the commander, focusing on the enlisted force. Typical responsibilities include:

• Advising the commander on enlisted morale, welfare, training, discipline, and readiness.
• Acting as a bridge between enlisted personnel and the command team, communicating concerns upward and policies downward.
• Mentoring noncommissioned officers (NCOs) and enforcing professional standards.
• Representing the enlisted force at official events, ceremonies, and public engagements. These duties help ensure that the command’s day‑to‑day operations and policies work well for the enlisted workforce and support the mission.

The Office of the Senior Enlisted Advisor to the Chairman of the Joint Chiefs of Staff (OSEAC) is the small staff organization that supports the Senior Enlisted Advisor to the Chairman (SEAC). The SEAC is the U.S. military’s most senior enlisted member and the principal enlisted advisor to the Chairman of the Joint Chiefs of Staff. OSEAC’s role is to help the SEAC carry out these duties, which include:

• Advising the Chairman on issues affecting enlisted service members across all branches (active, Guard, Reserve, retirees, and families).
• Supporting the SEAC’s travel, engagements, and outreach to units worldwide.
• Coordinating with service and combatant command senior enlisted leaders and hosting forums such as the Defense Senior Enlisted Leader Council. Through this support, OSEAC helps ensure enlisted perspectives are represented in top‑level military decision‑making.

This assignment is for the position of Command Senior Enlisted Leader at the Defense Threat Reduction Agency (DTRA), a Department of Defense agency that focuses on countering weapons of mass destruction and related threats.

U.S. Air Force Chief Master Sergeant Shaun Campbell was selected to become the Command Senior Enlisted Leader for the Defense Threat Reduction Agency, replacing U.S. Marine Corps Sergeant Major Daniel Mangrum.

The official announcement does not state when Chief Master Sergeant Shaun Campbell’s assignment as Command Senior Enlisted Leader at DTRA takes effect, nor does it specify how long he will serve in that role. In general, senior enlisted assignments at this level often last around 2–3 years, but actual tour lengths vary based on service needs and individual circumstances. There is no publicly available, authoritative source giving exact start or end dates for this specific assignment.

The full text of the announcement and any official updates can be found on the U.S. Department of Defense website at the release page for this assignment. Additional context or republications of the same text may also appear on other reputable news or government sites. Primary source:

• U.S. Department of Defense press release: “Command Senior Enlisted Leader Assignment.”