About Us

Black Knight Security


Founded in 2003, Black Knight Security (BKS) specializes in security for commercial and residential properties, and educational institutions.

BKS exceeds standard guard service by offering emergency action planning and security consulting services, as well as training classes for facility occupants on how to respond to emergencies. Every BKS security guard is thoroughly screened, trained extensively, and also certified by the American Heart Association in first aid, CPR, and the use of an automated external defibrillator (AED) – an unusual attribute for a security company.

Black Knight Security provides protection, safety and education for tenants, visitors, and workers with a strict focus on preparedness, which is the key to not only feeling safe, but actually being safer.


 Black Knight Security was named a Top Guarding Firm for 2015 in Security Magazine's 13th Annual Top Guarding Firms Listing. Founded in 2003, our fast-growing company's focus on delivering the highest quality guarding services ranks us among companies over 50 years old with multi-billion dollar revenues.


Black Knight Security is a proud member
of BOMA Pittsburgh, BOMA Chicago,BOMA Greater Cleveland and ABOMA.

Our Approach

At Black Knight Security, we believe that preparedness is the key to truly making persons and property secure. That’s why we prepare our clients for the unexpected by equipping them with all the tools needed for an effective emergency response. By understanding and identifying each client’s unique security needs, the BKS team can determine which security services are necessary to keep tenants and visitors safe. Taking a partnership approach with our clients, we believe it is in our mutual best interest to continue to search for the most cost-effective security solutions by monitoring the latest developments in the industry.


Our Management Team

A management team with 75+ years of combined security experience has made Black Knight Security the leading authority in security for commercial and residential properties, and educational institutions. Since founding the company in 2003, Dennis Lejeck has built a management team with extensive experience within the security industry and beyond. BKS provides innovative employee benefits and programs that attract high-quality guards, who are at the core of the quality service our clients enjoy. As a result of exceeding the industry’s employee relations standard, BKS has raised the level of service that the company provides.



Dennis W. Lejeck


Serving in the U.S. Army during Operations Desert Shield and Desert Storm, Dennis Lejeck understands the importance of preparedness and security in times of uncertainty.

His military experience and 20+ years in private security have given him insights into the trends concerning security needs in the U.S. Having experience in all aspects of security operations, Mr. Lejeck was able to create a security firm focused on customer retention through its innovative programs for both its clients and employees.

Prior to founding BKS, Mr. Lejeck served as the Director of Security for Pittsburgh’s US Steel Tower, a 2.4 million square foot, Class-A commercial high-rise, and Chicago’s River City Apartments, a 1.2 million square foot residential high-rise. While in the military (1988-1993), Mr. Lejeck was responsible for training stateside units deploying to Operations Desert Shield and Desert Storm. He received three Army Achievement Medals and an Army Commendation Medal during his service.

Past awards and recognition include:

  • 2007 – Pittsburgh Business Times Diamond Award
  • 2008 – Smart Business Pittsburgh Pacesetter Award
  • 2008 – Pittsburgh 100 Fastest Growing Companies
  • 2008 – Ernst & Young Entrepreneur of the Year Program Participant
  • 2008 – Graduate of the University of Pittsburgh’s Institute for Entrepreneurial Excellence
  • 2009 – Pittsburgh Magazine 40 Under 40
  • 2014 – Department of Defense Patriotic Employer Award
  • 2014 – Smart Business Pittsburgh Smart 50 Award
  • 2015 – Pittsburgh 100 Fastest Growing Companies
  • 2016 – Pittsburgh 100 Fastest Growing Companies
  • 2017 – Pittsburgh 100 Fastest Growing Companies
  • 2018 – Pittsburgh "Fast 50" Fastest Growing Companies

Mr. Lejeck is an active member of the Building Owners and Managers Association of Pittsburgh (BOMA), utilizing his business and leadership experience to contribute to the welfare of others.






"In motivating people, you've got to engage their minds and their hearts. I motivate people I hope, by example - and perhaps by excitement, by having productive ideas to make others feel involved."
                                 - Rupert Murdoch


Mark E. Springer, CHS-IV

Director of Business Development

As our Director of Business Development, Mark's primary objective is to market and build BKS into a regional security provider. Prior to joining our team, Mark worked as the Vice President of Business Development for a Pittsburgh-based security provider. During his five year tenure there, Mr. Springer helped the company to expand their operations to cover a six state region.

In 2015, as a result of Mark's business development efforts, Black Knight Security made the Pittsburgh Business Times list of the 100 Fastest Growing Companies. In 2016 BKS again achieved the goal of ranking in the Pittsburgh 100 in two consecutive years.

Mark, a veteran of the United States Navy, has more than 17 years of experience in the law enforcement field as a police officer and also served two Western Pennsylvania communities as their Chief of Police. Following his career in law enforcement, Mr. Springer served in several prominent security leadership roles in major industrial plants such as AK Steel, General Motors and Simon Properties. Mr. Springer brings to Black Knight Security a large amount of experience in industrial security, retail security, contract security services, and regional security business development / operations.

Mark has been recognized as a CHS-IV by the American Board for Certification in Homeland Security.


"Optimists enrich the present, enhance the future, challenge the improbable and attain the impossible."

            - William Arthur Ward 



Kimberly Jones, CHS-IV

Director of Operations

Kimberly joined Black Knight Security (BKS) in 2013. Her primary role as Director of Operations will be to ensure that we are meeting customer expectations in her Pittsburgh portfolio. Kim will achieve this through the creation of detailed policy and procedure manuals, regular scheduled customer meetings, and security officer training to include CPR/AED and Standard First Aid.

Prior to joining BKS, Kimberly served eight years in the United States Army as a Medical Specialist serving in Operation Desert Shield and Desert Storm. Kim's military experience combined with her five plus years of experience in the private security industry make her a true asset to BKS.

Kim is a graduate of the Academy of Court Reporting & Technology with an Associate Degree in Paralegal Studies.

Kim has been recognized as a CHS-IV by the American Board for Certification in Homeland Security.

 "The manner in which one endures what must be endured is more important than the thing that must be endured."

                                    - Dean Acheson


Cortney Rech, PHR

Director of Human Resources

Cortney joined Black Knight Security (BKS) in 2018. She is responsible for the strategic development and management of Black Knight Security’s growing human resources needs, leading recruitment and retention and expanding its culture as the company ramps up for growth in the Pittsburgh and Chicago markets.

With over 15 years in the human resources field, Cortney brings expertise in talent acquisition management, reward and recognition, and organizational and professional development.

Cortney received her bachelor’s degree from West Virginia University. She holds a Professional of Human Resources Certification (PHR) from the HR Certification Institute. Cortney is also a member of the Society for Human Resource Management (SHRM) and the Pittsburgh Human Resources Association (PHRA).

“It doesn’t make sense to hire smart people and then tell them what to do; we hire smart people so they can tell us what to do.”

                                              – Steve Jobs

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