With over 20 years of proven experience, we’ve joined Protos Security to build the leading national tech-enabled security services company.
With over 20 years of proven experience, we’ve joined Protos Security to build the leading national tech-enabled security services company.
When you need trained law enforcement, Protos offers second- to-none coverage through the nation’s largest off-duty law enforcement network. With 60,000 off-duty personnel and more than 1,400 agencies, we provide expertise when and where you need it. And with our always-accountable customer service, you have one point of contact, 24/7 dispatch and ongoing account management.
Standing Post
Emergency Security
Executive Protection
Workplace Security
Roving Patrols
Traffic/Crowd Control Services
Customized Solutions
Crisis Management
and Disaster Response
One call to Off-Duty Services provides immediate access to thousands of armed police officers across the United States. All our officers are skilled, certified and actively employed by local, county and state law enforcement agencies. They are fully vetted for:
Hiring off-duty police, and managing this process, is harder than it looks. Off-Duty Services provides active off-duty police officers with the temperament and experience to effectively work in your locations. We match an officer’s experience and their agency’s culture to the unique protection needs of the situation they will be placed in.
Our technology is designed to streamline processes and provide accountability utilizing web and mobile app technology. Our application is designed to push work assignments directly to the officers on the mobile app as well as, empower officers by providing the details of a customer’s request, and track the officers who work those assignments. When the assignment is started, the officer will clock in and clock out with geolocation verification technology. Officers can then document information within the mobile app including video, photos and notes. This information is uploaded into our system for tracking and reporting.
Let’s talk about how Protos Off‑Duty Services can deliver for you.
580 Westlake Park Blvd, Suite 400
Houston, TX 77079
Telephone: (281) 346.2188
110 Franklin Road SE, 8th Floor
Roanoke, VA 24011
Telephone: (866) 403.9630
Texas license number: C14062
© 2025 Protos Off-Duty Services. All Rights Reserved | Privacy Policy
Executive protection services and security guards in police uniform not available in North Carolina.
383 Main Ave, Suite 505
Norwalk, CT 06851, USA
Phone: 203.941.4700
383 Main Ave, Suite 505
Norwalk, CT 06851, USA
Phone: 203.941.4700
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.