Leadership Team

Joseph Drissel, Founder and CEO

In November of 2010, Joseph founded CyberESI after an extensive career in information systems and cybersecurity with the Federal Government.  More than $250 billion is lost each year in the US alone to cyberattack, and Joe was driven by the opportunity to change that outside the confines of large, sometimes slow-to-respond organizations.

Through years of service to government and commercial customers, Joe has built a formidable skill set and come to intimately understand what works and what doesn’t.  This is the knowledge base at the core of CyberESI.

Joe has served on the faculty of the Computer Science Department at the University of Maryland in Baltimore County. He regularly speaks on the topics of cyber security, intrusions, forensics analysis and the value of proactive data protection, including at the Department of Defense Cyber Crime Conference, to the US Commerce Department, the National Institute of Standards and Technology (NIST), and a variety of commercial industry leaders.

Matt Barrett, Chief Operating Officer

Matt brings a 20+ year career of technology, management, and leadership skills to the CyberESI leadership team. His experiences as an engineer, a Fortune 100 consultant, a Federal contractor, and a Federal employee have enabled him with a very broad perspective on people and business. Matt is equal parts pragmatic and visionary, and has a knack for matching products and services, to business models, to leadership teams. His skills in navigating politics and complex systems have enabled success both in large multi-national organizations and 100-person small businesses.

Matt is also a rare blend of biotechnology and information technology. During Matt’s early career he had roles in testing anti-viral drugs like Acyclovir, growing cells in the laboratory, and cloning small scale mammals. A pivot into IT security led to roles such as building the intrusion detection system for Merrill Lynch on-line and full IT re-builds (firewalls, DNS, mail, etc.) of a $4B/year mutual fund company. Matt’s recent roles include managing industry-affecting programs including the National Institute of Standards and Technology’s Security Content Automation Protocol (SCAP) program and the Framework for Improving Critical Infrastructure Cybersecurity (aka Cybersecurity Framework).

Jim Hanson, Director of Engineering and Development

Jim brings many years of software development experience, built on a foundation of hardware experience, to his work for CyberESI.  He is responsible for designing and implementing software support for all operations. This includes integrating the storage and processing of the wide variety of data gathered in operations and support for automated analysis. Previously Jim spent seven years at Tenable Network Security where, among other achievements, he designed and implemented the government-standards-based automation approach used with Nessus, the well-known vulnerability scanner.

Before his focus on network security, Jim spent more than twenty years doing computer games development in many genres on many platforms. This work included technologies such as 3D Rendering, motion capture, artificial intelligence, physics modelling, networking, and tools to make development processes more efficient. Previous to this, he served for eleven years with the US Navy, repairing and maintaining the full array of Naval Tactical Data Systems, and spent a busy three years as Senior Electronics Engineer at a robotics manufacturing company.

Ron de Leos, Director of Government Cybersecurity Services

Ron de Leos is a skilled security professional with extensive management and leadership skills. Ron has over 20 years’ experience in information technology, specializing for more than 13 of those years in cybersecurity, particularly in cyber intrusion investigations and incident response. He is currently leading a specialized information security team to design and implement security solutions for CyberESI’s government clients.

Ron has managed a Security Operations Center whose mission was to detect, remediate, and thwart advanced cyber adversaries targeting the Defense Industrial Base (DIB), DIB data, and DIB constituencies.  He has also managed multiple teams responsible for training Department of Defense Federal Law Enforcement in the fields of cyber incident response and intrusion investigations as well as developed and taught some of the courses.

Ron’s practical, first-hand experience includes cyber incident investigation, incident response, and  cyber threat intelligence collaboration.

Roman Sheriff, Technical Director of Cybersecurity Services

Roman leads a team that designs and deploys intrusion detection and prevention solutions to the CyberESI client base. Previously Roman worked in the Intrusions and Information Assurance section of the Department of Defense Cyber Crime Center where he performed reverse engineering of some of the most advanced malware samples extracted from DOD’s and its partner’s networks. 

A lifelong computer enthusiast Roman has always been fascinated by computer viruses, Trojans, and techniques used by hackers to exploit vulnerable systems. Roman attended and graduated with honors from Wilmington University with Bachelor of Science in Computer and Network Security.

While in college Roman and his team competed and won the Department of Defense Digital Forensics Challenge placing first in the undergraduate division and third world wide.

Regina Sheridan, Director of Commercial Security Services

Regina has over 15 years of experience in the cybersecurity arena. She has led SOC/MDR teams, global awareness and training initiatives, and has extensive experience in developing policies and security strategies aligned with internationally accepted standards such as NIST and ISO 27001. She is also a proud founding member of the International Association of Security Awareness Professionals (IASAP), and holds a B.S. in Organizational Leadership from Regent University.