Work With Us

Career Center

Our Culture: How we work together to lead and succeed as Team Protos

Protos embraces an entrepreneurial spirit that is rarely found in organizations of our size. We were founded on innovative technology to improve the industry and are still known as the leaders in technology-enabled security services. We explore possibilities and blaze our own trail toward solving even the most complex client challenges.

Our four values – integrity, accountability, innovation and excellence – are at the center of what we do and why we do it. At Protos, we truly care about and recognize the hard-working people that are part of our business ecosystem and we work to improve the security industry from every angle.

Browse our current open listings and submit an application:

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.