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.

Review from Trustpilot
99% of the time, my concerns and issues are handled with understanding, empathy, and promptness, and I truly appreciate that level of service. My only concern is the lack of communication when an offer is made. There have been instances where dispatch does not follow up or provide feedback, leaving me uncertain about the status of the offer. Improved communication and timely follow-ups would make an already positive experience even better. Thank you for your continued support and understanding.
Review from Trustpilot
the dispatch and staff always helping and try to fix any issue
Review from Trustpilot
Protos Security is one of the leading security providers in the Northern United States. The company offers well-designed security systems and services that are reliable, effective, and built to meet the needs of its customers.
Review from Trustpilot
Advance notification is always best.
Review from Trustpilot
Excellent with the dispatch when you need something corrected they're always there to help you I have no complaints whatsoever I appreciate Protos and all the help they give us at my company thank you. I would also like to thank the invoice staff in helping out with any corrections that may need to be.
Review from Trustpilot
Great service provided by Protos and the exceptional guard service provided
Review from Trustpilot
good working with protos security
Review from Trustpilot
Not giving the seniority companies first option, the companies that have been partners together for years.
Review from Trustpilot
fullfillment stay and dispatch are generally great to work with
Review from Trustpilot
Our experience partnering with Protos Security has been very positive\. From the beginning, their team has demonstrated professionalism, responsiveness, and a strong commitment to building a successful partnership with Leone Protective Services\.

Protos has been great to work with, particularly when it comes to communication, addressing concerns, and keeping us informed of client needs and expectations\. Their team has consistently treated us as a valued security partner rather than simply a vendor, which has helped create a strong working relationship\.

We appreciate the opportunities Protos has provided to our company and the trust they have placed in our team\. We look forward to continuing to strengthen our partnership and providing the high level of service that our clients expect\.

We are proud to partner with Protos Security and would gladly recommend them to other security providers looking for a professional and collaborative partnership\.
Review from Trustpilot
Good company, great staff and strong security network. Vendor representation is excellent and the operations team is great to work with.
Review from Trustpilot
Working with Protos Security has been a great experience. Their team is professional, responsive, organized, and easy to work with. We truly value our partnership and look forward to continuing to work together.
Review from Trustpilot
Amazing company growing partnerships
Review from Trustpilot
The was very responsive and helpful
Review from Trustpilot
Very good company to work with.still need help with myself Bill Thompson COO getting in the portal.
Review from Trustpilot
The company is very professional in their dealings with our company

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.