At CEO (Boardroom Media) we track over 1,000,000 startups and over 5,000,000 people who hold key positions in these companies. We use this directory of startups to highlight top employees, founders and board members we think deserve more appreciation than they are currently getting.
This list showcases the top Chicago based CEO’ operating in the Cyber Security space. If you think a CEO’ is missing from this list, feel free to contact our editor on [email protected].
The individuals on this list have been included because of exceptional performance in one of the following categories:
- Innovation – Operating as a key part in an extremely innovative business or startup.
- Growth – Operating as a key figure in the growth and upscale of a market leading business or startup.
- Management – Showing exceptional management skills.
- Societal impact – Putting their business on the map for their positive societal or environmental impact.
Our Data – We source our data from OSINT (open source intelligence) and public directories such as Crunchbase, SemRush and many more. The data from these sources should be treated with a degree of caution and verified yourself.

Robert Yoskowitz
Co-Founder and Chief Executive Officer of Nullafi
Follow Robert Yoskowitz:
About Nullafi: Nullafi Shield is a zero-code add-on to any endpoint that gives admins one-click control over what data that endpoint receives
Carl Nerup
CEO of Cog
Mr. Nerup is the Founder and Chairman at Cog Systems, a private company focused on delivering high assurance ARM based virtualization solutions to the mobile, server, and IoT markets. Prior to this role, Mr. Nerup was the CMO at Cog Systems. Previously, Mr. Nerup was Vice President in Samsung’s Global Enterprise Business, where he had sole accountability for all direct and indirect sales for the industry leading Samsung Knox Secure Mobility platform. Prior to that, he was a member of the Executive Team at General Dynamics Broadband, where he was the Vice President in charge of global business development for their new line of business in the secure mobility industry – GD Protect. He also served as an Executive in Residence at Carnegie Mellon University, where he worked with the Quality of Life Technology Foundry; a National Science Foundation Engineering Resource Center. He was also a vice president in AT&T’ Strategic Business Development organization, where he had responsibility for identifying new business opportunities across all AT&T business units. He also evaluated all Venture opportunities and managed the full Minority Investment Portfolio for AT&T. Prior to AT&T, Mr. Nerup was a Managing Director at Digital Island, a Cable & Wireless Company, a start-up provider of global hosting and content delivery services. Previous to that, Mr. Nerup was on the launch team for Aerial Communications, a start-up provider of GSM services in seven markets across the U.S., where he was the Head of Sales Operations and Distribution Strategy. Additionally, Mr. Nerup continues in his role as a Partner at Skyline Partners, a private equity firm based in Denver that specializes in select investments and specialized management consulting. Mr. Nerup is a frequent speaker at industry forums and conferences. He also provides advisory services to numerous companies in the emerging high technology and telecommunications industries as well as select non-profit organizations and graduate schools. As a fun fact, Mr. Nerup has been part of six ‘exits’ in his career through either acquisitions or mergers. He is also an avid backpacker and lover of the outdoors.
Follow Carl Nerup:
About Aegis Secure, Cog: We virtualize IoT. Cyber security focused on the connected device marketplace.

Harvey Gannon
CEO of CampusGuard
Gannon is the Chief Executive Officer of CampusGuard, an international provider of PCI DSS compliance services. He also serves as an Executive Director for Nelnet, Inc. (NNI/NYSE) a leading provider of services and solutions for the public sector, including government and education institutions globally. Previously, Mr. Gannon was Co-Founder, Chairman and Chief Executive Officer of infiNET Solutions, the largest provider of Automated Billing, Payment Processing and Campus Commerce solutions for higher education institutions in the United States, until its sale to Nelnet, Inc. in 2006. After its sale to Nelnet, Inc. he became President of the Nelnet Business Solutions, which provides full-service business office automation, campus commerce, centralized payment processing and information delivery solutions for colleges and universities. Mr. Gannon is a dynamic speaker that provides a clear vision for the future of technology as an enabler of solutions, and their effect on society, business and education. His unique ability to apply practical thinking to technology’s role in people’s lives and work has made audiences applaud, laugh, and walk away with a fresh perspective on technology and its impact on them. He has shared his vision and insight as a speaker and on Higher Education industry panels and as a keynote speaker at conferences across the globe. In addition, Mr. Gannon has served as the President of Big Brothers Big Sisters of Lake County, IL, where he managed all the activities of the Executive Committee and the Board of Directors. He holds separate undergraduate degrees in Electrical Engineering and Management.
Follow Harvey Gannon:
About CampusGuard: CampusGuard Providing PCI compliance and information security services to the campus-based community

David Lesser
President & CEO of Nexum
Follow David Lesser:
About Nexum: Nexum provides users with information security and networking solutions.

Jeff Mullarkey
Co-Founder and Chief Executive Officer of RKON
Under Jeff’s executive leadership, RKON has grown to become one of the nation’s premier managed cloud providers. A broad range of Fortune 2000 companies turn to RKON to solve their toughest IT challenges—from hosted virtual desktops to disaster recovery to managed security and virtualization. In 2014, RKON was named to Inc. Magazine’s list of the 500 fastest growing private companies. CRN also ranks the company among the Top 500 Solution Providers in America. Prior to forming RKON, Jeff served as MicroAge’s general manager for the Chicago area, leading the growth of the company from $3 million to $25 million in a three-year period. Jeff is a graduate of Illinois State University.
Follow Jeff Mullarkey:
About RKON: Since 1998, RKON has delivered IT Transformation helping private equity and corporations achieve Quiet IT from vision to execution.
Erik Kellogg
CEO, Strategy of inCyber Compliance
Follow Erik Kellogg:
About inCyber Compliance, The Crypsis Group: Cybersecurity Compliance. Simplified. Automated. SaaS. RegTech
Alexander Cato
CEO and Founder of Privacy One
Serial/parallel entrepreneur passionate about building technology with a social mission.
Follow Alexander Cato:
About Privacy One: Privacy One is an innovative cyber privacy company shaping the future of the internet.
Rocio Baeza
CEO and Founder of CyberSecurityBase
Rocio Baeza the CEO and Founder of CyberSecurityBase, a consulting practice that helps rising tech companies get started with information security. There are volumes of data security and privacy laws/regulations, frameworks, and standards, oftentimes overwhelming tech leaders with not knowing where to start, let alone implement foundational items needed to compete in the marketplace. CyberSecurityBase operates with a mission is to simplify security, teach that model, and empower tech leaders. She studied Mathematics at the University of Chicago. Her professional background includes data analytics, product management, and IT compliance in the private sector. Her previous roles include analyst, consultant, manager, and Chief Security Officer. During this time, Rocio has observed that rising tech companies are in a unique position where they are offering innovative products and services, however, the traditional information security model is an immediate poor fit. This is leaving emerging tech companies AND consumers in a vulnerable position, and Rocio is on a mission to help change that.
Follow Rocio Baeza:
About CyberSecurityBase, Jemurai: CyberSecurityBase provides you with services to implement a simplified security program at your company.
Erik Nathan
President, CEO (COO-prior) of Sendio
President/CEO at Sendio.
Follow Erik Nathan:
About Sendio: Sendio is an e-mail security company offering the facility of totally eliminating spam and e-mail threats in the enterprise environment.

Matthew Konda
CEO of Jemurai
Follow Matthew Konda:
About Jemurai: Jemurai is a boutique security consulting company.