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
Friendliness and responsiveness of the team is commendable.
trustpilot
On-time payment and easy-to-use application for jobs
trustpilot
Protos is great they keep work flowing. They are professional and always egged to help or correct any issues.
trustpilot
They are very professional they they will correct their mistakes and they are concerned about their vendors.
trustpilot
Communicates well and very professional!
trustpilot
Protos is organized in all of their operations to vendors and clients:
trustpilot
Working with Protos, has been a breath of fresh air. Allowing myself and employees to expand our reach in the security space.
trustpilot
Management services are greatly appreciated their guards monitoring and not to mention the other services PROTOS provides
trustpilot
I do not call often but when I do the professionalism and quick action they take is priceless. Deidra is fantastic. Kind and helpful with excellent follow up.
trustpilot
Protos is working with vendor, by taking our call's 24hr always here to answer all your question, Glen sider and his team, calling up to check how the vendor is doing and update us our performance, making sure we get all the support we need to continue to service well.
trustpilot
Very professional staff and helping out vendors like myself with work I am very grateful that you guys have helped me out as well as my employees and my company would always work with you guys thank you and appreciate your company.
trustpilot
Jonathan was very professional and answered all of my questions. It was very informative and will help us to maneuver through the process. Look forward to working with Protos!
trustpilot
I had an excellent experience! Everything was smooth, well-organized, and easy to navigate. The service was reliable and exceeded my expectations. I especially appreciated the clear communication and attention to detail, which made the entire process stress-free. The team was professional, friendly, and genuinely cared about delivering quality. I would definitely recommend this to others and look forward to using it again.
trustpilot
It was the updated information and the potential improvement of our companies working together. I would also like to acknowledge Mr. Jon Rozas he was very personable and his discussion was efficient and productive.
trustpilot
Vigilance Protection Services, LLC had an exceptional experience during the vendor onboarding process with Protos Security. From the beginning, their team demonstrated professionalism, clear communication, and a structured approach that guided our company through every step efficiently.

The instructions provided were precise, leaving no ambiguity about documentation requirements, compliance standards, or deadlines. Protos Security’s responsiveness to questions and follow ups was remarkable, ensuring that all concerns were addressed promptly. The onboarding system was organized and user friendly, making submission of required documents straightforward and efficient.

Throughout the process, Protos Security maintained a consistent focus on clarity and professionalism. Every interaction reflected a commitment to high standards, allowing Vigilance Protection Services, LLC to complete the vendor setup without confusion or delay.

We were particularly impressed with their transparency and attention to detail. They ensured all aspects of compliance, licensing, and operational readiness were thoroughly verified, demonstrating that Protos Security values quality and reliability in its vendor partnerships.

Overall, Vigilance Protection Services, LLC found the experience with Protos Security highly positive. Their structured process, responsive communication, and professional approach made the vendor onboarding process seamless, efficient, and reassuring. We recommend Protos Security to any company seeking a partner that prioritizes professionalism and thoroughness.
trustpilot
Very good communication and support at all level of the Protos management and operations team

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.