What Is the Coast Guard Investigative Service (CGIS)?
The Coast Guard Investigative Service (CGIS) is a federal law enforcement agency that operates under the United States Coast Guard (USCG), which is part of the Department of Homeland Security (DHS). CGIS special agents conduct investigations related to criminal activity, national security concerns, and violations of the Uniform Code of Military Justice (UCMJ). As a key player in maintaining military justice and operational integrity, CGIS enforces federal laws and supports Coast Guard missions worldwide.

What Do CGIS Special Agents Investigate?
CGIS special agents conduct investigations into a wide range of criminal offenses and misconduct involving Coast Guard personnel. Common areas of focus include:
- Drug smuggling and trafficking
- Sexual assault and harassment
- Fraud, theft, and embezzlement
- Espionage and counterintelligence
- Homicide and violent crimes
- Violations of the UCMJ
In addition to criminal investigations, CGIS is responsible for protective service operations and often works in collaboration with other federal law enforcement agencies such as NCIS, the FBI, and the Department of Defense.
Who Are CGIS Special Agents?
CGIS special agents are skilled federal law enforcement professionals, many with prior experience in military law enforcement or other federal agencies. They receive specialized instruction at the Federal Law Enforcement Training Center and are authorized to carry firearms and execute warrants. CGIS special agents may be active duty military, civilian personnel, or warrant officers, all serving to uphold the mission of the U.S. Coast Guard Investigative Service.
How Does CGIS Fit Into the Structure of the U.S. Coast Guard?
CGIS operates under the authority of the Commandant of the U.S. Coast Guard and plays an essential role in preserving the discipline and readiness of Coast Guard units. Investigations led by CGIS can lead to:
- Administrative actions
- Disciplinary proceedings under the UCMJ
- Criminal charges under the United States Code (U.S.C.)
The outcomes of these investigations often affect eligibility for promotions, retention, and security clearances among Coast Guard personnel.
What Should You Do If You’re Under CGIS Investigation?
If you become the subject of a CGIS investigation, take immediate action to protect your rights. Recommended steps include:
- Do not speak to investigators without legal representation
- Contact a military defense attorney as soon as possible
- Avoid discussing the investigation with colleagues or online
- Gather relevant documentation
A background investigation by CGIS can also impact long-term service in the USCG, making it critical to seek guidance from experienced legal counsel.

How Can a Military Defense Attorney Help?
An experienced military defense attorney can be instrumental during a CGIS investigation. Legal counsel can:
- Advise on interactions with CGIS special agents
- Represent you during interviews and proceedings
- Ensure your rights under the UCMJ and U.S.C. are upheld
- Develop a defense strategy if charges arise
Having a defense attorney knowledgeable about Coast Guard investigative procedures and military justice increases your chances of a favorable outcome.
Schedule Your Free Initial Consultation
If you’re under CGIS investigation or believe you might be, The Military Defense Firm is here to help. Our law firm focuses exclusively on military law and defends active duty military personnel and others subject to CGIS investigations.
Contact us today for a free initial consultation. Protect your career, your reputation, and your future.


