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Proven Security. Real Experiences.
Trusted Results.

At Protos, we strive to deliver measurable impact and unmatched service. From Fortune 500 companies to local businesses, our clients count on us for consistent, responsive and professional security services. Check out the reviews below to discover how we’ve delivered peace of mind and operational excellence to clients across North America.

trustpilot
Absolutely awesome. Protos delivered exactly what was promised with professionalism and consistency. Protos delivered professional, responsive, and reliable from start to finish. Our experience was an awesome service, clear communication, dependable support, and a smooth overall process. Customer service was exceptional, clear communication, timely responses, and a team that truly values its clients.
trustpilot
Amazing people to work with, very professional and helpful.
trustpilot
Protos is a wonderful client. They are always there to guide and support and really make us feel like a partner.
trustpilot
Great company!! Great people!!
trustpilot
My experience was great because of the professionalism, clear communication, and how smoothly everything was handled from start to finish.
trustpilot
Easy going And a pleasure to work for always.
trustpilot
We enjoy working with Protos Security it is a great partnership. Protos Security is always great in communication they are always on top of everything from the dispatch operation center to account managers. We always work together always having the same goal ensuring standards in services are exceptional!
trustpilot
This company provided an open minded interactiom with its partners giving them an exceptional personal relationship
trustpilot
As small security company, navigating the security landscape can be overwhelming and a bit intimidating. The team at Protos Security has changed that for us. They want you to succeed in every caveat of this business. They offer the tools to be competitive and survive in this atmosphere.
trustpilot
We’ve had a very positive experience working with Protos Security as a subcontractor providing both armed and unarmed security guard services. While we are licensed in both Texas and Louisiana, to date we have supported them with security personnel in Texas.

During the onboarding process, their team was organized, responsive, and hands on. Christine Lucsky, our Vendor Onboarding Specialist, ensured the process was clear, efficient, and completed to a high standard, which set the tone for a strong working relationship from the start.

What sets Protos Security apart is their structured, data driven approach to vendor management. We consistently engage in quarterly performance reviews with Richard Cueba, our Sr. Manager Vendor Relations, where we analyze metrics, client feedback, and guard performance. This level of oversight and collaboration is not common in the industry and plays a key role in maintaining service quality and accountability.

Protos demonstrates a clear commitment to operational excellence by tracking critical metrics such as attendance, punctuality, and reporting compliance. As a subcontractor that works with multiple security providers, this level of structure and consistency stands out.

Their business practices reflect a genuine investment in communication, accountability, and long term partnerships. They approach vendor relationships as true partnerships rather than transactional arrangements or an after thought, which makes a difference in execution and client satisfaction.

In one instance, they included us in a client meet and greet to ensure alignment before deployment, resulting in a seamless transition and reinforcing their commitment to quality service.

As our partnership continues to grow, working with Kevin Tice, our Field Account Manager, has been a strong asset. He serves as an effective bridge between the client and our team, ensuring clear communication and operational alignment.

We also appreciate being invited to their conference in Las Vegas, which further reflects their investment in their network and commitment to strengthening partnerships.

Overall, Protos Security sets a strong standard for professionalism, operational structure, and engagement. We value the partnership and look forward to continuing to support their operations while growing together.
trustpilot
We have proudly partnered with Protos Security for over three years, steadily growing our relationship from handling emergency and short-term assignments to supporting long-term, ongoing projects. Throughout this time, the partnership has proven both enriching and highly productive.

Our collaboration has created meaningful value on both sides, with a shared commitment to delivering transparent, accountable, and reliable security services to clients. By aligning on these standards, we have consistently ensured that clients receive not only protection, but also professionalism and clear communication.

Protos Security is exceptionally well-positioned to serve a diverse range of clients nationwide. Their model of working with trusted, locally based security firms allows for strong operational execution at the ground level, while maintaining high standards across all engagements. This structure enables scalability without compromising quality, making Protos a highly effective partner in the security services industry.
trustpilot
Overall relationship is good. Some procedural processes need to be tightened as the miscommunication with dispatch to guards on procedural items has caused our vendor rating to go down which I feel us not fair.
trustpilot
Protos Security is organized, responsive, and provides consistent work opportunities. Communication is solid, and they make it easy for local companies to connect with larger clients. Overall, a reliable partner in the security industry.
trustpilot
Protos is doing a amazing job in ensuring standards in services are being met. Kim is great and always provides great energy.
trustpilot
Great company to partner with.
trustpilot
Great guards and leadership!

Showing our 4 & 5 star reviews

Protos
Headquarters

383 Main Ave, Suite 505
Norwalk, CT 06851, USA
Phone: 203.941.4700

Protos
Headquarters

383 Main Ave, Suite 505
Norwalk, CT 06851, USA
Phone: 203.941.4700

Mark Hjelle

Chief Executive Officer

Mark Hjelle is the CEO of Security Services Holdings, LLC as well as Protos Security and its subsidiaries. Mark is an experienced Chief Executive Officer and Board Member who has led large national business and facilities services firms for nearly 25 years delivering strong top- and bottom-line growth while building high-performing teams with strong culture. Most recently, he was CEO for CSC ServiceWorks, a B2B2C provider of technology-enabled consumer services. Prior to CSC, Mark was President of Brickman/Valleycrest a national provider of exterior landscape and snow removal services. Over the course of his 18-year tenure at Brickman, he held numerous leadership positions in operations, finance and business development. Mark holds a Bachelor of Science degree in Economics from The Wharton School of Business, University of Pennsylvania, a Master of Government Administration from the University of Pennsylvania Fels Institute of Government and a Law Degree from Case Western Reserve School of Law.