About Us

Our Focus is Application Security

Our unique approach, technology and product, OnSystem Defender, offers companies the best available protection against harmful malware and application flaws. The last frontier in malware protection is the application, which is where ALL current endpoint security products are routinely turned off or otherwise bypassed by attackers. Our patent pending In-Memory Application Reference Monitor is non-bypassable. An attacker cannot violate our rules in ANY way.

Why We Started the Company

  • Deep conviction that security is of the utmost importance for any company’s success in this digital age.
  • Current Anti Virus products are completely inadequate at protecting applications from sophisticated malware attacks. They are reactive and assume attackers don’t know what the protector is doing.
  • Companies are typically severely delayed in patching their environments of known vulnerabilities.
  • Zero Day attacks expose every company to constantly changing malware threats.
  • A different approach was needed to address all these existing and growing exposures.
  • We possessed strong domain expertise in secure operating system design and sound computer security. We started working on solving these problems in 2015.
  • Wanted to build another high-integrity, high-performing, collaborative culture and successful company.

Meet Our Executive Team


TJ Tajalli


TJ Tajalli

Chief Executive Officer

An innovator and serial entrepreneur in the areas of trusted operating systems, system access control, file system security, firewalls, encryption key recovery and behavior-based Host Intrusion Prevention, TJ brings 25+ years of IT industry experience with over 20 years focused on developing innovative information security software. Author of 7 issued and multiple pending patents, TJ has been instrumental in commercializing multiple successful security software technologies.

Following several entrepreneurial ventures as Trusted Information Systems and Platform Logic, and an executive leading endpoint software development for Symantec Corporation, TJ co-founded OnSystem Logic with the express purpose of providing high-end technical consulting services and building future generation of computer security products. TJ holds a MS and BS in Electrical Engineering from the University of Maryland as well as advanced DoD security credentials.


S. James Marazakis


Jim Mazarakis

Chief Operating Officer

Jim is a technology executive with 40 years of experience in banking, investment management and brokerage. He has served on senior leadership teams as EVP and Chief Technology Officer at WSFS Bank, Chief Technology Officer for T. Rowe Price and Divisional Chief Information Officer at J.P. Morgan Asset Management. He also worked on large-scale international projects and merger and acquisition teams at Capital One Financial and Goldman Sachs.

Jim graduated with a Bachelor of Science degree from Rensselaer Polytechnic Institute and a Master of Science in Management of Technology from Polytechnic Institute of New York University. He has written articles on technology topics in multiple publications and was recognized in 2007 by Information Week as a top 10 Innovator for his work at T. Rowe Price.


Jeff Graham

Chief Architect

Jeff Graham

Chief Architect

Distinguished security engineer and product architect for leading-edge security solutions including trusted operating systems, firewall, encryption, and behavior based HIPS. Author of 4 patents and developer of multiple successful commercial products and solutions. 25+ Years of experience in Product Architect roles.

  • OnSystem Logic – Chief Architect, Advanced Products
  • Symantec – Architect, Multiple Security Products
  • Platform Logic – Chief Architect, AppFire Product
  • E-centives – Product Architect, Web couponing/marketing
  • Network Associates – Product Architect, Gauntlet Firewall
  • Trusted Information Systems – Product Architect, Gauntlet Firewall and Trusted Mach
  • Digital Equipment – Software Developer, MCI Mail


BA Computer Science, College of William and Mary.