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Daniel J. O'Sullivan
Owner & Chief Executive Officer

Dan O'Sullivan is the founder and CEO of GC&E Systems Group, Inc. Over the last 18 years, Dan has grown GC&E from a one man company providing structured cabling installation services to a 200+ person organization providing diverse IT, voice, data, and security management systems integrations to diverse federal, state and local, government, healthcare and commercial clients. Dan has over 25 years of experience in the unified communication field with extensive experience supporting the defense market. His past experience covers the design, installation, and operation of a wide variety of communications systems as well as direct experience in technical sales and management. He has tremendous insight and experience in developing, implementing, operating, and maintaining diverse, unified communication system platforms utilized by the customers GC&E supports. Dan holds an RCDD/NTS/OSP certification, many technical training certifications, and holds low voltage and specialty licenses in Georgia, Florida, North Carolina, and Tennessee.

John Santacroce
Chief Financial Officer

John is a senior financial manager with over 30 years of experience, the last 25 years of which were at the Controller / Chief Financial Officer level for various organizations. John began his career in public accounting and then moved into the private sector gaining experience in the manufacturing, construction, and financial services industries. John earned his Bachelor of Arts degree in Accounting from Rutgers University. John is a Certified Public Accountant and active member of the Georgia Society of CPA's.

Karl Deiotte
VP of Strategic Business Initiatives 

Karl has more than 10 years of professional experience supporting federal customers in the fields of systems engineering, network modernization, and developing solutions focused on mission assurance. As Vice President of Strategic Business Initiatives, Karl is focused on continued market expansion, business growth, strategic partnering, and capability development throughout GC&E. Karl has a BS in Audio Engineering and a BA in Philosophy from the University of Colorado, Denver

Peggy Rowe
VP of Cybersecurity & IT

Peggy Rowe has over 25 years of experience in leading software development, cybersecurity and information technology teams in the delivery of complex communications and network management solutions for the commercial, federal and DoD markets.  As VP of IT & Cyber Security, Peggy provides technical guidance and advice in support of corporate strategic goals and initiatives, and leads the creation and delivery of innovative solutions for the enterprise as well as for customer infrastructure projects and services.  Peggy has an MS in Computer Science from the University of Southern Mississippi, and has been applying her passion for technology to practical business solutions ever since.


Dennis Bristol
President & Chief Operating Officer

Dennis Bristol II has over 20 years of experience in the information technology, telecommunications, and security management industry supporting large-scale programs, providing information technology, telecommunications, unified communications, and security management services. In his role, Dennis oversees the company's operational performance, business development and marketing, and contract execution. Dennis has a BS in Electrical Engineering from North Carolina State University.

Ed Ferrell
Senior Vice President

Ed Ferrell has 35 years of professional experience providing contract, program, and project management and technical expertise to a variety of federal, state, and local government clients to include the US Army, FAA, EPA, US Air Force, USPS, IRS, DOI, and the Volpe Transportation Center. As GC&E's Senior Vice President, he works with Executive Leaders to develop business growth and diversification strategies and to ensure GC&E's internal infrastructure scales to meet GC&E's growth and diversification objectives.

Jim Mann
Vice President - Security

Jim Mann has over 35 years of security system solutions development and lifecycle management experience in the development, deployment, operations, and maintenance of large scale, advanced security systems for diverse commercial and government customers. Jim leads GC&E's security business and is responsible for driving strategy, planning, and execution of our electronic security services. He is a security solutions subject matter expert and is responsible for identifying and integrating emerging security technologies into our portfolio of security products and services, as well as program and project cost, schedule and performance; technical and quality assurance; and security system sales, engineering, installation, operations, and maintenance.