Coastal Hybrid Threats

Lead: Joseph J. Leonard Jr.

Principal Consultant with the PENTA Consortium

CDR Joseph J. Leonard Jr. (USCG, ret.) is a 30-year veteran of the Coast Guard and is a Principal Consultant with the PENTA Consortium, LLC. He serves as the chair of the Greater Harris County Local Emergency Planning Committee and actively serves in the U.S. Coast Guard Auxiliary. He holds designations as a Master Exercise Practitioner, Master Continuity Practitioner, Certified Emergency Manager, Certified Homeland Protection Professional, and Certified Port Executive.  He has a BA in History from the Virginia Military Institute and an MS in Engineering Technology from Murray State University.


Donald Kim Erskine

Senior Infrastructure Resilience and Threat Analyst Decision and Infrastructure Sciences Division

Mr. Erskine currently is with Argonne National Laboratory.  Kim is a retired United States Navy SEAL Officer and National and Homeland Security professional.  He has more than thirty years of experience in counter-terrorism operations, intelligence, critical infrastructure protection and preparedness planning.

Following a distinguished Naval career, he served fifteen years as a consultant and Senior Federal Employee with the U.S. Department of Homeland Security (DHS). Prior to joining Argonne, he served as the Office of Infrastructure Protection Regional Director and Chief of Protective Security for Federal Region 1 (CT, MA, ME, NH, RI, VT). 

Mr. Erskine serves as a Civil Expert on Civil-Military Cooperation and Energy Infrastructure Security for NATO’s Civil Emergency Planning Committee and provides analysis of critical infrastructure vulnerabilities to hybrid threats for the Center of Excellence for Countering Hybrid Threats in Helsinki, Finland.


Sharon Russell

Director of Emergency Management for the Pasco Sheriff

Sharon Russell is the Director of Emergency Management for the Pasco Sheriff’s Office in Florida. She also continues to serve in the Coast Guard Reserves, where she is assigned to the National Military Command Center at the Pentagon. While on active duty, Commander Russell gained experience in incident management, responding to major incidents such as oil spills, vessel groundings and Hurricanes Katrina and Rita. She also served as the U.S. Coast Guard Maritime Security Project Officer for the Republican National Convention in Tampa in 2012, where she coordinated 20 different agencies, including Federal, State and local law enforcement in a joint operation to ensure the safety and security of Convention delegates, first responders and the public.