TDI was founded in 1988 to fulfill a need for high-quality, rapid-delivery technical documentation for the Naval Air Systems Command (NAVAIR). Several years later, this work expanded to the Space and Naval Warfare Systems Command (SPAWAR), and in 1993, TDI started supporting its first Foreign Military Sales program.  Over the next 10 years, TDI continued to provide operational, technical, and management support for various Navy programs. 

Since 2003, TDI has grown to offer our customers technology-driven solutions focused around core competencies in research and development, cybersecurity, software development and engineering, and engineering services.

Core Advantages

TDI brings over 25 years of experience across a wide breadth of government and commercial applications with the speed and agility that large businesses – and even some larger small businesses – cannot match.  TDI provides:

  • Highly skilled technical workforce
  • Nationwide presence
  • DCAA audited and compliant accounting system
  • Fully established and audited rates

TDI represents a team of dedicated professionals recognized for our expertise, innovation, and integrity.  When you work with TDI, you work with a team you can trust.

Mission Statement

TDI's MISSION is to provide consistent quality professional services and solutions that exceed expectations to ensure our customer's success.

TDI's VISION is to be the preferred provider of services for our customers and the employer of choice for current and future employees.

  • Customers are our reason for existing and TDI is committed to delivering innovative, timely, and cost-effective solutions to them.
  • TDI listens intently to our customers to identify key aspects of any given project to ensure requirements are understood from the start.
  • TDI maintains a solid employee base of professionals who are noted for their achievements and excellence.
  • Ethical behavior and integrity are required of all employees to display the utmost professionalism and courtesy to all customers, stakeholders and fellow employees.
  • Our employees have a positive attitude, strong work ethic and commitment to teamwork. We strive to maintain a strong work/life balance - family is important.

Dean Mancini


Dean has been Chairman and Chief Executive Officer of TDI since 2005. He brings over 20 years of business and technical experience. Dean began his career at TDI managing contracts and providing engineering expertise to Navy customers. He currently plays an active role in all corporate administrative and operational functions. His engineering background and leadership skills have transformed TDI from a company focused on technical documentation to a trusted provider of professional services, including engineering, cybersecurity, software development and research, and development projects. Dean has a Bachelor of Science degree in Electrical Engineering from Widener University. He has previously worked in engineering capacities for Boeing Company and W. L. Gore Associates.

John Renner


John joined TDI in 2013 to provide senior-level management and business development expertise. John brings over 30 years of experience in providing professional services to the federal government. His technical background spans information technology, software development, and engineering services. Throughout his career, John has managed technical support contracts of up to $50M and over 100 contract employees. He has also been responsible for capture management and proposal development for technical services contracts up to $100M.

John has a Bachelor of Science degree in Computer Science from Arcadia University. He has previously worked in varying capacities in operations and business development for Sabre Systems, Keystone Computer Associates, and Leeds and Northrup Company.

Vince Procaccino


Vince joined TDI in 2018 and has provided insights into various customers as well as a strategic focus for optimal implementation of the company’s capabilities and technologies. Vince brings over 30 combined years of experience working within the federal government as a federal employee and has also provided services to the federal government as a contractor. During his career, Vince has worked in various capacities supporting the US Navy and other agencies. Vince has technical and management experience and held positions in numerous areas. While employed at the Naval Surface Warfare Center in Philadelphia, Vince held multiple technical and management positions and has expertise in various projects and programs including Condition Assessment and Remote Monitoring, SmartShip, Controls and Automation, Integrated Logistics Support, and Acquisition Management. As a support contractor, Vince provided expert support to the Department of Navy Chief Information Officer (DONCIO) and to the Department of Interior Bureau of Land Management (DOIBLM). While supporting DONCIO, Vince helped launch the first deployment of the Navy’s smartcard, in what eventually became the Common Access Card (CAC) used today by DoD and other Federal Agencies. While supporting DOIBLM, Vince helped implement smart card solutions to solve both physical and logical access issues. Vince holds a Bachelor’s of Science degree in Mechanical Engineering from Penn State University. 

Robert Rodgers, PE


Bob joined TDI in 2018 as TDI commenced supporting NSWC Philadelphia Division in implementation of innovative technology for life cycle management of Hull, Mechanical, and Electrical systems for the US Navy.  Bob brings 15 years of experience in systems engineering crossing a variety of industries including power, rail, commercial maritime, and defense.  Bob is responsible for management of all TDI support to NSWCPD, including personnel and contracts.

Prior to joining TDI, Bob worked in a variety of engineering management and leadership roles, including with McKean Defense, GE Transportation, and NSWCPD.  He has supported defense acquisitions programs for new ship classes, life cycle sustainment and modernization, and innovation of ship integration, condition assessment, and data analysis and utilization.  Bob is a licensed Professional Engineer and has a B.S. in Electrical and Computer Engineering from Gannon University and a M.S. in Engineering Management from Drexel University.

Nick DiLeo


Nick is the Vice President of Research & Development at TDI, and provides expertise in unmanned systems, autonomy, machine vision, and data analytics. Nick manages TDI’s R&D portfolio and works with Government and commercial partners to determine innovative ways to solve their technical challenges. Throughout his career, he has served as Program Manager (PM) and Principal Investigator (PI) on several DARPA, ONR, and NSWCPD programs. Nick holds Bachelor of Science and Master of Science degrees in Mechanical Engineering from Villanova University. He has previously worked as a research scientist at Lockheed Martin with a focus on unmanned systems.

Brent Starr


Brent Starr is our Vice President of West Coast Operations.  He manages the Program Management and Business Development functions primarily focused on NAVWAR, NIWC PAC, and NIWC LANT.  Brent’s extensive background includes 27 years of Federal Service working in systems engineering and program management positions at NIWC, NAVWAR, and PEO C4I.  Additionally, he worked in Nuclear Command, Control, and Communications (NC3) for eight years.  Prior to joining TDI, Brent served as a Principal Acquisition Program Manager, where he led the Undersea Communications (manned and unmanned) Division and then later led the Nuclear Command, Control, and Communications (NC3) division.  Brent also served as the Deputy Program Manager at PMW 770 where he provided leadership to the entire program office. 

Janet Hirsch, SPHR, SHRM-SCP


Janet joined TDI in 2018 to provide human resources and recruitment expertise. Janet brings over 30 years of Human Resources experience serving as a strategic business partner leading the HR function, analyzing performance metrics, and aligning HR strategies to organizational goals. Janet is responsible for all aspects of human resource management and compliance. Janet is a member of the Society for Human Resources Management (SHRM) and is certified as a Senior Professional in Human Resources (SPHR) and also as a SHRM Senior Certified Professional (SHRM-SCP). Janet has a Bachelor of Science degree in Technical Management. She has previously worked as Vice President, Human Resources for VFL Technology Corporation, as well as global companies such as CSL Behring and Godiva Chocolatier.

Susan Beal


Susan is the Vice President of Administration, bringing over 23 years of government contract and subcontract management experience.  Susan is responsible for all contract management and administration, subcontract management, and contract compliance.  Additionally, she oversees the IT department as well as the marketing and training programs.  Susan is a longtime National Contract Management Association (NCMA) member and previously served as Vice President and Treasurer of the Greater Philadelphia Chapter.  She is also a member of The Society of Industrial Security Professionals (NCMS) and Women in Defense.  Susan joined TDI in 2019 to enhance the contracts department and has earned her Master's Certificate in Contract Management from Villanova University.  She has previously worked in contract capacities for Sabre Systems and Olympus Building Services.

Johnson Varkey


Johnson joined TDI in 2020 and has served in technical roles as well as management, with a focus on the growth and implementation of the company’s capabilities and technologies.  Johnson brings over 23 years of experience working in various capacities supporting the U.S. Navy, MSC, NOAA, USN support agencies, several shipbuilders, and numerous OEMs.  Throughout his career, he has worked on or led multiple engineering efforts in the area of Hull, Mechanical, and Electrical for the LCS, LPD, DDG, C.G., AOE, LHD, LHA, and NOAA class platforms.  He has supported various programs from acquisition, life cycle, and modernization, including Control Systems, Power Generation & Distribution, Propulsion Systems, Damage control, and Auxiliaries.  Johnson holds a B.S. in Electrical and Computer Engineering from Widener University, an M.S. in Systems Engineering and Engineering Management from George Washington University, and a Master’s certificate in Advanced Security and Information Assurance from Villanova University.

Andrew Buyck


Andrew joined TDI in 2019 in support of NSWC Philadelphia Division. Working alongside or leading several interdisciplinary engineering teams, he primarily supported the development of Machinery Control Systems for several US Navy platforms. Andrew brings 13 years of experience working across a variety of industries, primarily in the commercial manufacturing space. His technical background spans automation equipment design, process improvement, software development, industrial robotics, and systems engineering.

Andrew is responsible for operations management of all TDI support to NSWCPD. He plays an active role in supporting contract execution as well as personnel management.