The ESC serves as NIEM’s decision-making body regarding membership, funding requirements, program or technical direction, personnel appointments, and other organizational decisions as required for supporting NIEM management.

The primary sponsors of NIEM are Chief Information Officers (CIOs) of the U.S. Department of Defense (DOD), U.S. Department of Homeland Security (DHS), U.S. Department of Justice (DOJ), and U.S. Health and Human Services (HHS), and as such, are members of the ESC. Advisory members and invited guests of the ESC include but are not limited to the following.

  • The Global Justice Information Sharing Initiative (Global)
  • The National Association of State Chief Information Officers (NASCIO)
  • The Executive Office of the President Office of Management and Budget (OMB) Federal Enterprise Architecture (FEA) through the Chief Architect
  • The Office of the Director of National Intelligence (ODNI) through the Program Manager of the Information Sharing Environment (PM-ISE).
  • The Chief Information Officer of CrimTrac, Government of Australia

The NMO executes the ESC’s vision for NIEM while managing day-to-day operations, encouraging adoption and use of NIEM, and overseeing all working group and committee activities. The NIEM NMO coordinates with Communities of Interest (COIs), principal stakeholders, and other information-sharing initiatives to promote collaboration and interest in NIEM priorities.

Stuart A. Whitehead

Deputy Director, Cyber and Command, Control, Communications and Computers Integration (DD C5I), Joint Staff J6

Stuart Whitehead Photo

Mr. Whitehead serves as the Deputy Director for Cyber and Command, Control, Communications and Computers (C4) Integration (DD C5I), within Directorate for Command, Control, Communications, and Computers/Cyber, Joint Staff J6. 

He supports and advises the Chairman, Joint Chiefs of Staff regarding Joint Command and Control requirements; interoperability of legacy and future Command and Control capabilities with Intelligence, Surveillance, Reconnaissance systems, joint warfighting systems and cyber; oversees the DoD requirements for Joint Fires, Joint Close Air Support and Combat Identification mission areas, and supports the development of accelerated joint warfighting capabilities through joint capability assessments, in order to achieve a coherent Joint Force. 

Appointed to the Senior Executive Service in July 2007, he served as the Executive Director for the U.S. Joint Forces Command, Joint Capability Development Directorate (USJFCOM J8) and Assistant Deputy Director for Command and Control Integration, Joint Staff J8. Mr. Whitehead assumed his current position in April 2012. 

Mr. Whitehead served on active duty from 1980 to 2007, in a variety of U.S. Army armor and cavalry command and staff assignments in Germany, Kuwait, Turkey and the United States, including tank company commander; doctrine writer and instructor; division plans officer; cavalry squadron commander; Chief of Contingency Operations, Kosovo Forces; J5, NATO Joint Command Southeast; and Director, US Army TRADOC Program Integration Office for Battle Command. Additionally, Mr. Whitehead is a graduate of the US Army Command and General Staff College, the School of Advanced Military Science and the US ArmyWar College, Advanced Strategic Studies Program where he earned degrees in operational and strategic planning. 

Mr. Whitehead graduated from the United States Military Academy at West Point, New York in 1980, receiving a Bachelor of Science Degree. Beyond two master’s degrees from military colleges, he also has a Master of Science Degree in Administration from Central Michigan University. Mr. Whitehead received several military awards for meritorious service, has been published in journals, and provided numerous presentations to scientific, management, capability and material development forums. He is a recognized innovator and leader in implementing systems of systems engineering practices and bringing warfighter involvement to lifecycle management.

Katherine Escobar

Deputy Division Chief, Data and Services Division, Cyber and Command, Control, Communications and Computers Integration (DD C5I), Joint Staff J6

Katherine Escobar Photo

Katherine Escobar is the Deputy Division Chief for the Joint Staff’s J6 Data and Services Division. In this position, Katherine’s responsibilities include enterprise information technology, enterprise knowledge management, IT policy and standards, including information assurance, cyber security, and distributed networks that include Joint, interagency, and NATO organizations and capabilities. She is responsible for the oversight of the three branches of the National Information Exchange Model (NIEM) Management Office’s business, technical, and strategic communications, as well as the public-facing NIEM Business Architecture and Technical Architecture Committees.

Katherine has 20+ year experience in large-scale Government information systems development and within both the private and public sector, as a program integration specialist for enterprise-wide interoperability for the Navy, Marine, and Joint Staff programs. She has represented the Joint Staff on numerous high-level working groups and steering committees. She served as the US Head of Delegation for the NATO Modeling and Simulation Working Group to develop a multi-national Modeling and Simulation as a Service solution under the NATO Science and Technology Office. 

Ms. Escobar also served as an adjunct professor for Old Dominion University, ECPI and University of Phoenix. She developed, delivered, and implemented over 10 technical courses, including XML content courses, with multiple sites, including remote and classroom delivery requirements including a university accredited knowledge / project / process management course of instruction. 


  • MBA, Saint Leo University in Information Security Management 
  • BS, Saint Leo University in Computer Information Systems 

Professional Certifications:

  • Certified Information Systems Security Professional (CISSP) - current


As specified in its Charter, the mission of the NBAC is to set the business architecture​ and requirements of NIEM, manage NIEM Core, and facilitate the processes for the regulation and support of NIEM domains. The NBAC focuses on the following areas:

  • Business Architecture: The NBAC oversees and validates the construction, maintenance, and use of the business architecture framework for NIEM.
  • NIEM Core: The NBAC provides management and oversight of the NIEM Core—the central part of the NIEM data model that’s commonly understood across all domains.
  • Community: The NBAC serves as the forum for the admission of new domains and interactions between domains, and coordinates action to maintain the NIEM community.

Roles and responsibilities

The committee’s responsibilities are to:

  • Maintain the integrity, usability, and maturity of NIEM core, and engage in any requisite harmonization and issue resolution activities.
  • Determine the need for new data model releases as necessary, such as to accommodate new domains and content, or to provide business requirements to the NTAC.
  • Submit recommendations to the ESC concerning the admission of a new domain into the NIEM data model.


The NBAC is made up of stakeholders across diverse communities. NIEM’s domains—communities that are formally established to manage and govern a portion of the NIEM data model—serve as the foundations of the committee. The NBAC is led by co-chairs and includes voting members, a NIEM PMO liaison, and observers and invited participants.


Kamran Atri

Photo of Kamran Atri

Kamran Atri is the co-founder of A4SAFE, Inc., which provides program management and information technology expertise to public sector clients in the Homeland Security and Defense sectors. Mr. Atri combines high-level strategic visioning and technical prowess with on-the-ground agile project management and team leadership.

Mr. Atri has held a host of professional roles, including serving as Chief Technology Officer to two successful corporations serving the public sector for a combined period of 15 years.  During his tenure, he was (and remains) an active member of the DHS Enterprise Data Management Office (DHS EDMO) and the DHS Enterprise Architecture Center for Excellence (EACOE).  His prior service for DHS extends to 2 years as Deputy Chief Architecture for DHS NPPD and foundational roles in both the NIEM Biometrics and NIEM Emergency Management Domains.  He has served as the NIEM Business Architecture Committee Co-Chair since 2015.  He has also served as the Chair of NIEM International Tiger team since 2016.

As co-founder of A4SAFE, Mr. Atri and his management team lead a team of systems engineers, enterprise and data architects, analysts and program managers.  His former role of CTO lends him expert status in all aspects of enterprise data management, including governance, modeling, assurance, Big Data analytics and exchange methodologies across the full data lifecycle.  He also has an in-depth understanding of Federal Enterprise Architecture, reference models, such as PRM, SRM, DRM, and TRM.

Mr. Atri has been awarded the "Smart CIO/CXO 2012 CTO" Award, the 2009 Best of NIEM National Aware and the DoT OCIO "Enterprise Architecture Compass" Award, as well as the NPPD OCIO "DHS Coin" Award for his services and support.

LinkedIn Profile for Kamran Atri

Thomas Krul

Mr. Krul brings over 20 years' experience in technology and asset management and development.  Known best amongst his peers for his energetic and client-focused IT/IM professionalism.  He is attributed with a balanced acumen comprised of managerial, technical and creative skills.  He holds three patent awards relating to computer science. His present position as Manager, Interoperability and Portfolio Management, Chief Information Officer Directorate, Public Safety Canada bridges key responsibilities across initiatives, including management and promotion of the National Information Exchange Model (NIEM), directorate reporting, Continuity Management, and management of oversight of directorate activities.

His long standing relationship amongst industry partners to include Microsoft, Avid Technology, Logitech, Creative Labs, and Bell Canada have proven advantageous in outreach and design efforts to date.  He has cultivated both depth in expertise and reputation via his rich network of professionals both home (Canada) and abroad.  His lifelong commitment to excellence in technology is demonstrated through both his current and planned endeavors in data asset management, interoperability, information sharing, and brand marketing.

LinkedIn Profile for Thomas Krul

Voting members

Name Domain
Jacquie Butler Agriculture
Bobby Jones Agriculture
John Boyd Biometrics
Thomas Freed Biometrics
Diane Stephens Biometrics
Melson Martis CBRN
Thomas Tullia CBRN
Dan Cotter Emergency Management
Lain McNeill Emergency Management
Kamran Atri Emergency Management 
Gail Kalbfleisch Health
Caitlin Ryan Health
Chris Traver Human Services
Dorothy Wan Human Services
Jennifer Kish Immigration
Luvisia Molenje Immigration
Curtis Ross Immigration
Ash Chaterjee Infrastructure Protection
Sue Dorr Intelligence
Matthew Lucas Intelligence
Renee Messalle International Trade
Shailesh Sardesai International Trade
Cherie Cochran Justice
Kate Silhol Justice
Benjamin Apple Maritime
Rodney McCoy Military Operations
Ralph O'Connell Military Operations
Steve Yonkers  Screening
Dan Morgan Surface Transportation


Name Domain
Thomas Krul Canada
Chris Carrino Statistics


Ongoing activities

NBAC members continuously gather and assess community business requirements for architecture enhancements. Also, with the support of lead developers, NBAC members conduct ongoing cross-domain and core data harmonization as well as issue resolution activities.

Annually, the NBAC co-chairs conduct a review of the committee's membership, activities, and domain maturity.

Fiscal Year Activities

NBAC Stands Up the Emerging Technologies Tiger Team The NBAC Emerging Technologies Tiger Team (E3T) has worked collaboratively to focus on the impact of artificial intelligence, internet of things (IoT),  and identity management on the NIEM community; NIEM’s role and opportunities with Open Data; and alignment of NIEM vocabularies and Domain support with international standards. All NBAC members are invited to participate.

NBAC Continues the International Tiger Team

Since 2016, the International Tiger Team has worked collaboratively to identify and define the unique information sharing needs of the international NIEM community, focusing on:

  • Shaping NIEM’s approach to data sharing across international boundaries
  • Engaging international NIEM community members
  • Attracting new organizations
  • Creating an additive update to NIEM Core that leverages the EU core models​

Get involved!

Observers and invited participants from all communities are always encouraged to actively contribute to the NBAC by sharing their expertise and recommendations. Contact us if you are interested in observing or learning more about the NBAC!


As outlined in its Charter, the primary mission of the NTAC is to define​ and support the technical architecture that governs NIEM. In addition, the NTAC:

  • Documents and maintains NIEM’s technical specifications.
  • Provides robust, effective development of the NIEM core structure and complementary processes to support and enable users to efficiently develop, use, and reuse data definitions and information exchange specifications.
  • Delivers and maintains a tool strategy that meets stakeholder requirements in support of information exchange across organizations.

Roles and responsibilities

The committee’s responsibilities are:

  • Establish and support the NIEM technical architecture.
  • Establish mechanisms and processes for publishing NIEM content artifacts.
  • Ensure all content in the NIEM data model appropriately conforms to NIEM specifications.
  • Maintain communication and interaction with other NIEM program entities, such as the help desk, NBAC, and NMO.
  • Analyze and assess emerging technologies and how they relate to NIEM; develop roadmap for future capabilities.
  • Establish goals, milestones, and desired outcomes, and measure performance.


NTAC members represent operational practitioners and subject matter experts, key stakeholder agencies, domains, and systems developers across all levels and branches of government, as well as solution providers. Membership types include co-chairs, voting members, NMO liaison, lead developers, and observers/invited participants.


Mike Hulme

Mike Hulme PhotoMike Hulme is the Co-Chair of the National Information Exchange Model (NIEM) Technical Architecture Committee (NTAC), working extensively with state, local, and tribal organizations to implement systems that maintain and share mission information.

As an Enterprise/Solutions Architect for Unisys Corporation, Mr. Hulme has more than 20 years of experience developing, delivering, and integrating justice and public safety information systems and solutions for government agencies. He has implemented state and local law enforcement message switching and city- and county-level integrated justice solutions that share information between law enforcement, prosecution, courts, corrections, and human services, using NIEM and other standards.

Nationally known for his technical leadership in the use of Extensible Markup Language (XML) for justice information sharing, Mr. Hulme has actively served on the NTAC since its inception in 2005. He is a founding member of the Justice XML Structure Task Force of the Global Justice Information Sharing Initiative, providing thought leadership, guidance, and review for the development of the Global Justice XML Data Model (GJXDM), now the justice domain of NIEM. He is a member and past chairman of the Integrated Justice Information Systems (IJIS) Institute’s IJIS Technical Advisory Committee (I-TAC).

Mr. Hulme has provided technical guidance and review to all three major versions of NIEM, working to continually improve the technical aspects of the model. He has served as a speaker and a trainer at many NIEM events, including the official public announcement of NIEM. He was the primary author of GJXDM Information Exchange Package Documentation Guidelines and contributed to its successor, the NIEM Model Package Description Specification and the NIEM Naming and Design Rules. He authored an NTAC white paper on NIEM Business Information Exchange Components and Enterprise Information Exchange Models, and developed Information Exchange Package Documentation for many government information exchanges.

Mr. Hulme was the first recipient of the Robert P. Shumate Contributor of Excellence Award from the Integrated Justice Information Systems (IJIS) Institute, for his work to support the development of information sharing standards now adopted widely throughout the United States.

Scott Renner

Scott Renner PhotoScott is a principal engineer at The MITRE Corporation. Scott served as the Air Force representative among the authors of the Net-Centric Data Strategy in 2003. He published the first paper describing the "community of interest" concept for data management in 2001, followed by the "COI Handbook", "COI Lessons Learned", and "My Two Cats Are a COI". He has served on three Air Force Scientific Advisory Board study panels: one defining the Joint Battlespace Infosphere (JBI) concept in 1999, another on database migration for C2 in 2001, and the third on domain integration in 2005. Scott received a Ph.D. in Computer Science from the University of Illinois in 1990. Scott is the federal co-chair of the NTAC, serving on behalf of the Department of Defense

His favorite thing about NIEM?

"The no-nonsense deliberation on precise, useable technical specifications."


Focus areas include:

  • JSON (technical specifications and user guidance)
  • NIEM Model updates (release 4.2)
  • Open Data and NIEM’s role
  • Modernization of NIEM Training resources

The NTAC continuously works on:

  • Establishing and supporting the NIEM technical architecture
  • Establishing mechanisms and processes for publishing NIEM content artifacts
  • Ensuring all content in the NIEM data model appropriately conforms to NIEM specifications
  • Analyzing and assessing emerging technologies and how they relate to NIEM

Get involved!

Observers and invited participants from all communities are always encouraged to actively contribute to the NTAC by sharing their expertise and recommendations. Contact us if you are interested in observing or learning more about the NTAC!

In addition, each NIEM domain represents the stakeholders, governance, and data model content oriented around the business needs of a community. To learn more about NIEM domain governance, visit the NIEM domain governance page.