Alex Fitzsimmons

Biography

Alex Fitzsimmons is a clean energy, energy security, and public policy leader with deep experience spanning federal government leadership and private-sector clean energy innovation. He currently serves as Director of the Office of Cybersecurity, Energy Security, and Emergency Response (CESER) at the U.S. Department of Energy (DOE), where he leads national efforts to protect and strengthen the resilience of the country’s critical energy infrastructure against cyber, physical, and climate-related threats. In this role, he oversees programs focused on emergency preparedness, infrastructure security, and coordination with industry, states, and federal partners.

Previously, Alex served as Chief of Staff at DOE and as Deputy Assistant Secretary in the Office of Energy Efficiency and Renewable Energy (EERE), including as Chief of Staff to the Assistant Secretary. In these roles, he helped guide department-wide strategy and advance initiatives supporting energy efficiency, renewable energy deployment, advanced manufacturing, and energy innovation. His leadership contributed to shaping multiyear program strategies and strengthening cross-agency collaboration during a period of significant clean energy investment and policy development.

Outside of government, Alex has held senior roles in the private sector and nonprofit policy organizations, including leading government affairs for Sila Nanotechnologies, a next-generation battery materials company, and serving as Senior Director at ClearPath, where he oversaw clean energy policy portfolios spanning energy storage, manufacturing, and critical minerals. He holds a bachelor’s degree from The George Washington University and a master’s degree in cybersecurity from the Georgia Institute of Technology, and is widely recognized for bridging policy, technology, and market perspectives to advance secure, resilient, and sustainable energy systems.