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Address: 3475 Leonardtown Road
Suite 203 Waldorf Maryland 20601
Phone: 240-419-2134
Fax: 240-412-0115
24Hr Dispatch

About Us

To utilize the over seventy-five years of collective law enforcement and training to become a leading provider in the field of asset protection. Blackout Investigations & Security Services (BISS) will accomplish this mission by forging strong partnerships with our clients with a dedication to providing professional employees who will secure a safe environment for the client’s business, protecting against physical harm and property loss.

BISS has a strong presence throughout the Metropolitan area, and has been regarded as a leader in the industry. We provide services for both the public and private sectors. BISS's reputation comes from the outstanding services offered to its clients providing Superior Guard Services, Police Officers (active duty and retired), the highest level of Personal Protection, and specialties such as Workers Compensation and Insurance Fraud Investigations.

BISS's core competencies include:

  • Strong leadership
  • Total Security Guard Services
  • Personal, Executive, and Diplomatic Protection
  • Workers Compensation and Insurance Fraud Investigative Services
  • Consulting and Training

Blackout Investigations & Security Services, Inc (BISS) was established in 2006 by former U.S. Marine and retired Maryland State Police First Sergeant, Guy Black. Since 2006, BISS has become one of the fastest growing SECURITY GUARD and INVESTIGATIVE companies in the Metropolitan area because we understand the individual needs of our clients.

ASIS International

Coalition of Black Maryland State Troopers

Fraternal Order of Police

Maryland Investigators and Security Association

Maryland Troopers Associations

National Association of Investigative Specialist

Minority Business Enterprise

Disadvantage Business Enterprise

Veteran Owned Small Business

L.C. M.B.E. Charles County Local Certified Minority Business Enterprise

L.C. M.B.E. Prince Georges’ County Local Certified Minority Business Enterprise

Graduated Tuner Construction Management Training Program 2015.

Graduated Small Business Administration’s Emerging Leaders Program 2014.

Mid-Atlantic Region Top 100 Minority Business Enterprise 2014 & 2016


Mr. Black a former member of the United States Marine Corps where he served as a Military Police Officer. After a number of years as a security officer, began his career as a Maryland State Trooper where he rose to the rank of Assistant Barrack Commander.

His many years of experience as a Marine and a Trooper set the foundation for the manner and style he has built Blackout Investigations and Security Services. Strong core values, discipline and outstanding leadership are the principles that make up Blackout.

Mr. Black has amassed an impressive resume with the many supervisory position he has held such as, Associate Academy Instructor, Training Coordinator, Tactical Platoon Leader, Criminal Investigator Coordinator, Counter-Terrorism, Police Selection Committee, Crisis Management, Special Events Coordinator, Promotional Assessment, and more.

A retired Police Officer with 25 years of Law Enforcement Experience. Robert started his career as a Police Officer in 1988 with the Montgomery County Police Department before moving over to the Prince Georges County Police Department where he was assigned to Special Operations Division as a SWAT team member before his retirement in 2007.

During Roberts career as a county officer he acquired a variety of experiences as the supervisor in charge of security for the County Administrative Building. He supervised over 30 civilian and sworn police officers. He developed expertise in CCTV's, X-Ray and Metal Detectors, Alarms, Bomb Training, Emergency Building Evacuation, and Crowd Control.

Darryl has over 20 years of Law Enforcement/Public safety experience. He is a former member of the United States Marine Corps. During his career with the Maryland State Police he was assigned to the police academy as the lead instructor, responsible for training what many consider the best police officers in the state of Maryland.

Darryl is a graduate of the University of Maryland at College Park. He has a BA Degree in Criminology. 

After retiring from the state police in 2000 he was hired by the District of Columbia Protective Services Police Department as a Captain responsible for Patrol Operations. He was promoted up the ranks to the Deputy Chief of Police, responsible for more than 50 sworn and civilian personnel.  

In 2008 Darryl agreed to become the Director of Public Safety for the District of Columbia Public Library. In this position, he served as the Chief, responsible for 25 sworn and civilian personnel.   


"We would like to thank Mr. Garvin and his guards for their dedicated work. They always showed up on time and made sure to check in with us in the office when they arrived. Since on site we have not had any incidents. They played a key role in communicating with trades that came in after hours.
A great example of their performance was when they questioned a contractor that came to site after hours. Blackout was not informed they were to show up. The contractor left and informed the next day they were not allowed on site.
Thank you for your work and we look forward to working with you in the future."


Assistant Property Manager

“I spoke with one our new residents earlier today, and she wanted to compliment the guard on duty. He professionally asked someone, who hung around the garage entrance then piggybacked into the building behind her, to leave the property and he did.” The new resident was too uncomfortable to speak up to the person in question but the guard wasn't. She wanted to pass along a “BIG THANK YOU!!”.


Property Manager

“Thank You!... Please convey and share my gratitude for the excellent services Blackout Security has provided us throughout the last few months - I really appreciate the promptness and professionalism of your supervisors and the staff you provided on location. I will certainly keep your company in mind in the future should the need arise, and I will recommend Blackout Security to any person I come across that needs the services that you provide.”


General Manager

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