Leadership


Jan Smith, Chief Executive Officer

Jan Smith is an Alabama native, educated at Jacksonville State University. She began her career as an associate software engineer in support of Boeing for NASA’s space missions.

As Ms. Smith grew as a technical analyst and senior manager, she led simulation and modeling tasks at Computer Sciences Corporation (CSC) for Army R&D and acquisition programs managed by the Space and Missile Defense Command (SMDC). She later joined Nichols Research Corporation (NRC) where she became the Vice President for Computer Applications and directed Systems Engineering and Technical Assistance (SETA) programs in support of the Army Aviation and Missile Command.

Today, Ms. Smith is the CEO of , the technical solutions company she founded in Huntsville, AL in 1991. The company operates in more than 25 states and provides professional services and solutions to the Department of Defense (Army, Air Force, Navy, and Marines) and numerous commercial clients.

Contact Jan Smith


David Diaddario, Vice President, Technical Programs

David Diaddario is currently the Vice President – Technical Programs for Systems Studies and Simulation(S3), Inc.  In this position, Mr. Diaddario is responsible for the technical operations, customer interface and growth within his portfolio which spans a broad range of Army missile and aviation program support.  Mr. Diaddario brings 37 years of DoD/Federal sector experience in technical and management roles.  He has worked technical roles in radar systems; missile seeker engineering; threat missile and radar system simulation development; and system of systems requirements development.  In addition, Mr. Diaddario has held numerous management and leadership positions ranging from technical management providing specific solutions, project and program management leading large multidisciplinary teams, and executive leadership driving large corporate organizations. 

Mr. Diaddario has also successfully led the capture of numerous contracts including large indefinite delivery indefinite quantity (IDIQ) efforts worth more than $900M and large task orders worth more than $200M.  Mr. Diaddario has held positions on numerous civic and professional organizations including the Air Space and Missile Defense Association, the Huntsville Aerospace Marketing Association, the Marshall space Flight Center Small Business Executive Leadership Team, and the Space and Missile Defense Symposium.  He is the recipient of the Honorable Order of Saint Barbara and is an Eagle Scout.  He earned a Bachelor of Electrical Engineering from Auburn University.

Contact David Diaddario


John Pack, Vice President, Subsidiary Operations and Business Development

John Pack is currently the Vice President of Subsidiary Operations and Business Development for System Studies & Simulation (S3).  He has responsibility for assisting the company’s senior leadership in developing long-term business strategies and plans to guide the company’s growth with existing and new customers across many diverse opportunities.  He also serves as staff principal for Corporate Safety and provides senior level management oversight of wholly owned subsidiaries Kachemak Bay Flying Service (KBFS), Global Logistics Support Services (GLSS), and S3 International (for which he is the subsidiary President).

Mr. Pack has worked for S3 since 2005 in several different capacities, serving as a Program Manager, Director, Business Development lead, and as senior manager for business units and subsidiaries. Mr. Pack is a retired Army officer who served in key command and staff positions that included battalion and brigade command, Legislative Liaison for the Secretary of the Army, Chief of Staff of the 2nd Infantry Division, Deputy Chief of Staff of the US Southern Command (USSOUTHCOM), and Executive Assistant to the Combatant Commander, USSOUTHCOM. Mr. Pack holds multiple Master’s Degrees in Business Administration and National Security Policy.  He is a recipient of the Order of St. Barbara and Order of St. Michael.

Contact John Pack


Dennis Vaughn, Sr. Program Manager

Dennis Vaughn is the Senior Program Manager for PEO Missile and Space and the Army Futures Command Aviation and Missile Center (AvMC) programs. He has served in a wide range of  senior technical and management positions since joining the company in 1999 following retirement from government civilian service as the Deputy Project Manager for Multiple Launch Rocket System (MLRS). Mr. Vaughn’s knowledge and experience gained from senior government technical and program management positions in the International MLRS, Stinger, un-manned air systems and Army Missile Research and Development Center (AMRDEC) continues to support S3 activities across multiply prime and subcontracts. Dennis has a BS in Mechanical Engineering from Tennessee Tech and a MS in Management from MIT where he was a Sloanfellow.

Contact Dennis Vaughn


Dean Reese, Sr. Program Manager for Strategic and Operational Rockets and Missiles (STORM)

Mr. Dean Reese is a former Government civilian and has been with since September 2001.  As a government civilian for 34 years, he was a Chief Engineer for the Army on a Tri-Service missile program and Chief Engineer for MLRS (now STORM). Mr. Reese also worked as a design engineer in the AMRDEC lab and served as a Flight Test Engineer for the Navy prior to serving in the US Army in the S&E program as an 0IC20 MOS (mechanical engineer) for 2 years.  He received his Mechanical Engineer degree from Washington University in St. Louis, Missouri.  He is also a graduate of the Defense Systems Management College in 1990. 

Since joining S3 in 2001, Dean has supported the Multiple Launch Rocket System Project Office as a Systems Engineer and over the last 10 years has been the Program Manager for the SETA support to that Project Office, which has changed names twice – Precision Fires Rocket and Missile System (PFRMS) PO and now the Strategic and Operational Rockets and Missiles (STORM) PO.   He has extensive background in development and production of free flight and guided missile systems and their associated launchers.

Contact Dean Reese


Dr. Mark Hannah, Apache Program Manager

Dr. Mark Hannah is the S³ Apache Program Manager supporting the Apache Attack Helicopter Project Office with Logistical, Programmatic, and Technical services. He supervises the S³ UH-72 Lakota support mission for the US Government and manages the company’s training development section for Government and Non-Government customers. In this role, Dr. Hannah is responsible for developing business and managing contracts that primarily support the Training and Doctrine Command (TRADOC) and Army Futures Command (AFC).  He currently manages and leads a team of technical experts in the execution of 14 Department of Defense (DoD) contracts located at the US Army Aviation Center of Excellence (USAACE), Maneuver Center of Excellence (MCoE), and the Combined Arms Center (CAC). Dr. Hannah is also the PM of S3’s prime MCoE Multiple Award Task Order Contract (MATOC).

Dr. Hannah joined  in 2012 and served as the Task Lead for the Concepts, Experimentation, and Analysis Directorate and the Air Maneuver Battle Laboratory located at Fort Rucker before moving to Huntsville in 2018 for his current position. He has extensive experience in the development, evaluation, and testing of new Aviation concepts. Dr. Hannah served in the US Army over a 20-year career in the Infantry and in Aviation. He served as TRADOC’s Aviation Quality Assurance Officer accrediting all the Army National Guard Aviation Training Sites and as an Assistant Division Aviation Officer. Dr. Hannah has over 34 years of management experience and his PhD is in Information Technology with a specialization in Project Management.

Contact Mark Hannah


John Briggs, PMP: Program Manager, Maintenance, Logistics and Mentor-Protégé Programs

John Briggs is responsible for managing USG and FMS contracts that support Army National Guard and Partner Nation CONUS based operations and logistics.  In this role, he is responsible for delivering automated information systems and technical assistance services to S³ customers and leads the company’s award-winning Department of Defense (DoD) Mentor-Protégé Program. 

John has over 35 years of experience planning and managing complex military and commercial logistical operations and organizations and is a Project Management Institute Certified Project Management Professional (PMP).  

Mr. Briggs holds a BA in English from the Virginia Military Institute and a MS in Logistics Management from the University of Central Texas.  He is a retired US Army Officer, whose assignments include logistics command and staff positions in the 101st Airborne (Air Assault), 3rd Armored and 1st Cavalry Divisions, as well as, the Senior Logistics (Maintenance) Advisor to the leadership of the Maintenance Depot Command, Saudi Arabian Ministry of the National Guard.

Contact John Briggs


Marcel Benoit, Crestview Site Manager, Kachemak Bay Flying Service (KBFS)

As a Senior Program Manager for Kachemak Bay Flying Service (KBFS), a wholly-owned  subsidiary, Marcel Benoit runs the company’s Crestview Flight Training Center (CFTC) in Crestview, Florida.  CFTC executes the company’s Cessna 208 flight training programs for multiple US Air Force contracts/customers.  Within CFTC, the Intelligence, Surveillance, and Reconnaissance (ISR) Academy conducts ISR training for domestic and international clients (in multiple languages). Marcel’s highly trained team provides Contractor Owned, Contractor Operated services in multiple fixed- and rotary-wing aircraft, using specialized training aids and simulation tools in complex flight operations. Marcel is also is responsible for developing new business and customers.

A 20-plus year veteran of the US Air Force, Mr. Benoit has extensive experience in air battle management, Special Operations aviation, electronic warfare, weapons, tactics, and strategy. He holds a Bachelor of Science in General Engineering from the US Air Force Academy and multiple Master’s degrees in technical disciplines and air/space strategy.

Contact Marcel Benoit


Bill Rodriguez, Temple, TX Site Manager, Kachemak Bay Flying Service (KBFS)

Bill Rodriguez is responsible for leading and managing Contractor-Owned, Contractor Operated Government and commercial civil aviation operations at one of two training and support sites for S3 wholly owned subsidiary, Kachemak Bay Flying Service (KBFS).  Mr. Rodriguez manages all contractor owned and operated aircraft flight and supporting maintenance activities for the Temple, TX Flight Training Center, which hold five FAA certificates, most notably for pilot training, avionics repair station, and non-scheduled transport.

Mr. Rodriguez’s previous industry experience includes serving as Director of Maintenance and Senior Technical Analyst for several military maintenance contracts while supporting CONUS-based operations, AMCOM, and FMS cases in Kuwait and the Kingdom of Saudi Arabia. Mr. Rodriguez has led industry rotary wing maintenance support for civilian and military helicopters and has provided similar commercial services to RW and FW assets.  He has also served as lead trainer for Airbus Helicopters North America and completed 21 years in US Army training and maintenance organizations, where he served in Quality Control, as a First Sergeant, and retiring as an Operations Sergeant Major.

Contact Bill Rodriguez


    Copyright © 2022 S3, Inc. | Terms of Use | EOE/Minorities/Females/Vet/Disabled System Studies & Simulation, Inc. (S3) BBB Business Review                 
    Last Updated 04/28/2022