Author: Henry J. Sienkiewicz

Henry J. SienkiewiczHenry J. Sienkiewicz, Adjunct Faculty (Former CIO, DISA), is a seasoned cybersecurity strategist, educator, and author with over three decades of experience in the public and private sectors. He is on faculty at Georgetown and George Washington Universities where he teaches graduate courses in cybersecurity, information assurance, and applied intelligence. His research work focuses on trust architectures, cyber risk frameworks, artificial intelligence, and digital sovereignty.

Mr. Sienkiewicz previously served as the Chief Information Officer and Approval Authority (AO) for the Defense Information Systems Agency (DISA), and is a retired Army Reserve Lieutenant Colonel.

Federal System Owner in the Age of Continuous Authorization
From the Summer 2026 Issue

The Federal System Owner in the Age of Continuous Authorization

Author(s):

Bobbie Stempfley, Vice President | Dell Technologies , Former CIO, Defense Information Systems Agency (DISA)

Dr. Ray A. Letteer, DSc, Former Director of Operations Risk Assessment, Office of the DoD Chief Information Officer, Former Chief Information Security Officer (CISO), Authorizing Official (AO), United States Marine Corps

Henry J. Sienkiewicz, Adjunct Faculty | Georgetown and George Washington Universities, Former CIO, Defense Information Systems Agency (DISA)

Introduction: When Ownership No Longer Means Control Federal system ownership is undergoing a quiet but consequential transformation (National Institute of Standards and Technology [NIST], 2018; Office of Management and Budget [OMB], 2016).

From the Spring 2026 Issue

Stewards of Mission Risk: The Evolving Role of the Authorizing Officials (AO)

Author(s):

Bobbie Stempfley, Vice President | Dell Technologies , Former CIO, Defense Information Systems Agency (DISA)

Dr. Ray A. Letteer, DSc, Former Director of Operations Risk Assessment, Office of the DoD Chief Information Officer, Former Chief Information Security Officer (CISO), Authorizing Official (AO), United States Marine Corps

Henry J. Sienkiewicz, Adjunct Faculty | Georgetown and George Washington Universities, Former CIO, Defense Information Systems Agency (DISA)

Introduction In a harsh misrepresentation, organizational Authorizing Officials (AO) are often thought of as an obstacle or simply a bureaucratic signature – a roadblock to progress. Reality intrudes. Reality should intrude. The

From the Winter 2026 Issue

The ATO Bottleneck: Rethinking Responsibility and Enabling Automation

Author(s):

Dr. Ray A. Letteer, DSc, Former Director of Operations Risk Assessment, Office of the DoD Chief Information Officer, Former Chief Information Security Officer (CISO), Authorizing Official (AO), United States Marine Corps

Henry J. Sienkiewicz, Adjunct Faculty | Georgetown and George Washington Universities, Former CIO, Defense Information Systems Agency (DISA)

The pace of the Authorization to Operate (ATO) process has long been a source of frustration and lost productivity. Technology can only make a difference if it is deployed. Yet, the pace

From the Winter 2026 Issue

Governing Complexity in the Age of AI: Operationalizing the Unified Linkage Model (ULM)

Author(s):

Henry J. Sienkiewicz, Adjunct Faculty | Georgetown and George Washington Universities, Former CIO, Defense Information Systems Agency (DISA)

Executive Summary Artificial intelligence (AI) has outgrown the control models once used to govern it. Checklists and perimeters cannot manage the systemic risks emerging from interconnected AI ecosystems. The Unified Linkage Model

From the Fall 2025 Issue

Establishing Trustworthiness: An Adaptive Governance Approach

Author(s):

Henry J. Sienkiewicz, Adjunct Faculty | Georgetown and George Washington Universities, Former CIO, Defense Information Systems Agency (DISA)

INTRODUCTION Modern cyber ecosystems increasingly resemble rhizomatic structures – non-hierarchical, lateral networks of interconnected nodes. With no clear center or periphery, this distributed topology promises resilience and agility. Rhizomatic structures complicate traditional

From the Fall 2025 Issue

Rhizomatic Threats in Practice: Applied Cybersecurity Modeling for Emergent Threat Landscapes

Author(s):

Henry J. Sienkiewicz, Adjunct Faculty | Georgetown and George Washington Universities, Former CIO, Defense Information Systems Agency (DISA)

Introduction The rise of decentralized digital infrastructures and flexible adversary ecosystems has destabilized traditional cybersecurity assumptions. Threat actors today often operate not within rigid hierarchies but through fluid, self-organizing networks resembling rhizomes—a

Enhancing Financial Industry Cybersecurity
From the Summer 2025 Issue

Enhancing Financial Industry Cybersecurity Through the Integration of Quality Assurance

Author(s):

Alexandra Kochie, Control Manager, J.P. Morgan Chase

Henry J. Sienkiewicz, Adjunct Faculty | Georgetown and George Washington Universities, Former CIO, Defense Information Systems Agency (DISA)

American bank robber Willie Sutton was reportedly asked why he robbed banks and answered, “Because that is where the money is.”  The financial industry remains a prime target. Today, cybercriminals or bad

From Detection to Direction
From the Summer 2025 Issue

From Detection to Direction: Security Operations Centers (SOCs) as Strategic Assets in Global Risk Management

Author(s):

Alessandro Azzaro, Independent Writer,

Henry J. Sienkiewicz, Adjunct Faculty | Georgetown and George Washington Universities, Former CIO, Defense Information Systems Agency (DISA)

Once a reactive help desk, the Security Operations Center (SOC) has evolved from dealing with trouble tickets, server logs, and alerts to the nerve center of enterprise resilience. What began as isolated