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
Regular check-ins to review our performance and opportunities to continue working with us as a vendor. While we have not been able to take advantage, they always provide access to resources and services that would be difficult to obtain independently.
trustpilot
You guys are the best partner to work with. When vendors do their part, everything is smooth. I do appreciate working with your team. Thank you
trustpilot
Working with Protos Security has been a great experience for our team. Communication is clear, expectations are well defined, and payments are always on time. Their platform is organized and easy to use, which makes scheduling and reporting smooth for both management and our guards. They treat their subcontractors with respect and professionalism, and it shows in how they run their operations. Highly recommend partnering with them if you're in the security industry.
trustpilot
If you’re looking for a reliable partner to handle the heavy lifting of sourcing and managing quality security contracts, I would highly recommend Protos. Their professionalism, attention to detail, and commitment to client satisfaction set them apart in the security contracting industry.
trustpilot
I learned a lot. It is easy to be part of protos with the help of your qualified staff communication.
trustpilot
Protos Security is ever ready to assist in any situation we encounter on the field.
They respond issue quickly, promptly and give a solution immediately.
trustpilot
My experience with the onboarding process was great. Nat Clermont was very helpful, professional, patient, and knowledgeable with informing me of the Protos standard operating procedures and what they expect from vendors. She made it easy and simple to understand and made me feel very welcomed to be a part of the team. I’m so looking forward to this. My experience with Protos has been extremely well. Nat Clermont is a great asset to Protos.
trustpilot
I am dealing with protos security almost 5 years
the staff working are very professional, so friendly, so nice and helpful

they very understanding and try they best to give their clint the professional work and carful

the payment on time all the time
trustpilot
The way Protos organized is great. Starting from finding the right vendor and filter out is great deal of work. And finally the way protos give the orientation is also A+.

Thank you for choosing OUM Security as your trusted partner. We are in this together.
trustpilot
Very clear communication, clear and accurate information for job assignments.
trustpilot
Periodic system issues when officers try to sign in and out in various locations.
trustpilot
Great company to work with been working with Protos since 2014
trustpilot
Amazing company to work with
trustpilot
The presenter was very honest and knowledgeable. Content is very accurate and easy to understand.
trustpilot
Everything has been great with Protos—thank you for the opportunity. My only suggestion is to offer more support to newer vendors. It’s been over five months since we registered, and we’ve only received one permanent account after multiple follow-ups. We do get occasional emergency accounts, but more consistency would really help.
trustpilot
Our experience working with Protos Security has been great. They've implemented multiple programs that truly support us as a vendor, and the overall structure has made collaboration smooth and efficient. The support from their team has been consistently solid, responsive, and professional. We look forward to continuing this strong partnership.

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.