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
Good Customer Service just how I like it make me feel pleased and answered all my questions
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
trustpilot
Working with Manny from Protos Security has been a fantastic experience. He demonstrates a high level of professionalism and consistently communicates clearly and effectively. Manny takes personal ownership of every situation, showing genuine commitment to resolving issues efficiently. His proactive approach and attention to detail make him a valuable asset, and I highly recommend him for any security-related needs.
trustpilot
The overall experience was great! From the communication to the honest and transparent detailed critic. I'm consistently pleased and overly satisfied whenever I'm communicating with... I guess I will be specific, Rich C. His knowledge In the industry is unmatched with his recommendation for success is what we desire as an organization.

Thank you and always a 5 star rating even after five life times!
trustpilot
The PROTOS organization is the complete package of integrity and professional service. Their communication and constant support are number one in our book.
trustpilot
Protos faciliated a vendor conference for security firms like ours that take on security assignment from Protos' nation network of clients. It was run extremely well and was incredibly value as a vendor to learn not just what Protos needs and encourages, but also hearing from clients directly as well as other vendors who are doing it well. First time I felt like a true partner with company similar to Protos's model.
trustpilot
Best security guard company to hire if you're looking for armed,unarmed and fire watch services
trustpilot
Quick response to an emailed questions with specific answers.
trustpilot
We had the pleasure of working with Protos as a subcontractor, and the experience has been nothing short of excellent. From the very beginning, their professionalism, responsiveness, and attention to detail stood out. Communication was always clear and timely, making coordination effortless.

The management team is reliable and supportive, ensuring that operations run smoothly and that both clients and staff are treated with respect. Their commitment to quality service and strong work ethic makes them an ideal partner in the security industry.

We truly value our partnership and look forward to continuing to work together. Highly recommended to anyone seeking a dependable and trustworthy subcontractor in the security field.

trustpilot
Where to even start , First of let me start by saying communication is everything to me and PROTOS team does such a great job with this. If you're a SMALL business trying to grow they will give you all the work you need to start growing, your vendor relations managers do whatever they can to get a contract that you can work with, dispatch does an amazing job at always answering calls immediately. The on boarding team is great! Very patient and informative . Even once you have the contracts, the SERVICE agents do a great job at helping you keep a great connection between your business and the clients needs. I am able to provide FAMILIES with work thanks to the GREAT work of the Protos team, we could not have done this on our own, it has all been TEAM work all around , feels like a dream at times but its not , this is really how Protos operates and I'm thankful for the opportunity. From all of us at Scorpion Protection thank you all for your hard work, we see you , we appreciate you.
trustpilot
Protos Security is very professional & transparent with their vendor relations which allows the opportunity for everyone to grow! Super happy & excited for years to come!
trustpilot
My overall experience working with PROTOS has been good. I do feel like there should be more permanent opportunities presented. But I do understand our footprint is not like other states and big cities.
Our company strives for quality over quantity. This we only hire the best and brightest security Officer, that must have a background of security, military and or law enforcement. We want to provide a quality over quantity service and stand out as an elite security agency.
trustpilot
Exchange of ideas from other vendors and partners.
Meeting Protos personnel
trustpilot
Protos is is well organized company, with proffessional personal. They are a good company to partner with. Protos has many clients and are able to give multiple jobs to alot of small security company's. They are fair and even offer higher competitive rate for smaller companies to actually make alot of profit. Since I have partnered with protos my company has grown considerable.
Thank you prots.

Poong cho
Tactical guard services

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.