Parents and educators alike place their trust in educational institutions to provide a safe haven for learning where students can thrive and excel without fear. This sacred trust is one we take seriously.

Defender One, stands as guardians of this trust, offering highly trained armed and unarmed security guards to safeguard the well-being of students, teachers, and educational personnel. Our team is comprised of individuals deeply versed in school safety protocols, and credentialed as School Resource Officers through the National Association of School Resource Officers program. Which, in fact, is the same way that local law enforcement receive their training.

We seamlessly integrate into your school’s existing security framework, ensuring a cohesive approach to safety. Our School Resource Officers (SROs) are adept at managing a spectrum of situations, from routine disciplinary issues to potential crisis events, with professionalism and expertise.

In addition to our School Resource Officer services, we offer a comprehensive suite of services including conflict resolution, student mentoring, and emergency preparedness training.

When our guards are assigned to any educational facility, we verify their certifications are current, and ensure they have the State-mandated training before they arrive on site. The safety and well-being of your staff and students is our #1 priority.



School Resource Officers (SROs) play a pivotal role in maintaining a secure learning environment by proactively identifying potential security threats and implementing preventative measures. Their intimate knowledge of the school’s layout and established procedures allows them to respond promptly and effectively to incidents, safeguarding the well-being of all school community members.


Our SROs are committed to building positive and supportive relationships with students, serving as mentors and role models. They collaborate closely with faculty and school administration to develop and implement programs that foster personal responsibility, respect, and good citizenship. These initiatives contribute significantly to creating a harmonious and inclusive school atmosphere.


Defender One Security equips its SROs with comprehensive training in threat assessment and crisis intervention, enabling them to recognize warning signs and take appropriate action to prevent potential incidents. Their expertise in this critical area plays a vital role in maintaining a safe and secure learning environment for all students and school personnel.


Our SROs collaborate closely with school administrators to craft and regularly update emergency preparedness plans. Through conducting drills, offering staff training, and coordinating with local law enforcement and emergency services, they ensure a seamless and effective response to any crisis. Our proactive approach guarantees that the school community is always prepared to navigate any emergency situation with confidence.


We foster open communication and partnerships with parents, local law enforcement, and other community stakeholders. Our SRO’s serve as liaisons between the school and the broader community, actively engaging in collaborative efforts to promote school safety and address any concerns that may arise. This holistic approach fosters a sense of shared responsibility and ensures that the entire community is invested in creating a safe and nurturing environment for all students.


Defender One prioritizes the needs and concerns of students, parents, and staff in safeguarding their physical and digital well-being within the educational environment. This approach emphasizes open communication, transparency, and collaboration among all stakeholders to effectively manage and mitigate security risks. By prioritizing the customer experience, institutions can create a safer and more secure learning environment that promotes trust, peace of mind, and academic success.


At Defender One Security, our guards undergo comprehensive training in various aspects of security, encompassing emergency response, conflict de-escalation, and active shooter scenarios. We understand there are unique challenges and requirements for each school. Rejecting a one-size-fits-all approach, we collaborate closely with school administrators to develop custom security solutions.


Access Control: Designed and installed at entrances and exits, these systems grant access to authorized personnel and students.

Surveillance: Our team is able to manage sophisticated surveillance equipment. We work alongside you to determine the ideal configuration and ensure you remain informed about the activities within your school’s premises.

Vehicle Patrol: Vehicle patrols play a crucial role in maintaining the overall safety of expansive campuses and universities. Our officers can conduct patrols in marked and unmarked vehicles, efficiently addressing situations as they arise.


Contact us today to speak with one of our security sales team at 443-834-6697.

Cynthia Cox

Human Resources Manager

With 21 years of management experience across various industries, including staffing, transportation, small business ownership, accounting, and operations, Cynthia brings a wealth of knowledge and a robust skill set to Defender One. Her diversified background has equipped her with a keen understanding of multiple business domains, making her an invaluable asset to the team.

Matthew Goodman

Assistant Director of Operations
Matt currently serves as Defender One’s Assistant Director of Operations. Matt is responsible for the day-to-day operations of Defender One and works closely with the Director of Operations & Training to implement goals and objectives for the company. As a nationally certified School Resource Officer and Force Science Analyst, Matt brings an interpersonal and holistic approach to the industry. He holds a Bachelor’s Degree in Criminal Justice from York College. Outside of work, Matt is an avid outdoorsmen, spending time perfecting his landscaping skills. Matt also enjoys quality time with his wife Ashley, and two cats, Ollie and Leo, as well as watching the Baltimore Orioles and Ravens.

Jennifer Krieger

Director of Human Resources
Jen currently serves as Defender One’s Director of Human Resources, managing our HR and back end finance teams. Jen has 30 years of experience in healthcare benefits administration, retirement benefits, financial planning and human resources. Jen holds a Bachelor’s Degree in Accounting from the University of Maryland, College Park and a Master’s Degree in Finance from Loyola University. Jen prioritizes an employee focused and driven company, with an emphasis on client and employee satisfaction. Outside of work, Jen enjoys running, watching her daughter play Division 1 Lacrosse, and playing with her grand-dogs.

Jared Krieger

Director of Operations & Training
Jared currently serves as the Director of Operations & Training at Defender One. In this role, Jared is responsible for the overall operations and training of Defender One and its staff. Jared currently holds a Bachelor’s Degree in Homeland Security & Counterterrorism. Jared is board certified in Security Management and Board certified as a Physical Security Processional by the American Society of Industrial Security. Jared is also an accredited Law Enforcement instructor in the following disciplines: Firearms, OC Spray, Expandable Baton, Handcuff, Taser, Defensive Tactics, and Force Science Analytics. Outside of work, Jared enjoys traveling and spending time with his girlfriend and three dogs.

Jon Krieger

Jon is the President and Founder of Defender One. Jon started Defender One in 2009, with the goal of bridging the gap between conventional security guards and law enforcement. Jon had a long and distinguished career in a large metropolitan police department for over 30 years, holding supervisory positions in several units, including patrol, internal affairs, traffic and community outreach. Jon has a Bachelor’s Degree in Criminal Justice from the University of Maryland, College Park. Outside of work, Jon spends his time spoiling his grand-dogs Fred and Barney, supporting the Ravens and Orioles, and watching his daughter play Division 1 Lacrosse.