About ICF

Elizabeth Diller

Vice President, Energy Lead

Elizabeth is a strategic leader with more than two decades of experience in energy and environmental policy.

Elizabeth serves as a strategic advisor on complex energy projects and leads our environmental energy practice which includes utilities, onshore and offshore renewables, mining, oil and gas and fiber optic cable projects throughout the U.S. Elizabeth builds integrated teams from within our deep bench of experts as well as from other firms that can form a cohesive unit to meet client needs and goals. Elizabeth founded ICF’s offshore wind practice and led this team for five years. She has an in-depth knowledge of the Bureau of Ocean Energy Management’s environmental review process for offshore wind energy projects as well as the industry in the United States.

Elizabeth has more than two decades of experience guiding a range of projects through the National Environmental Policy Act (NEPA) process and she is an expert on NEPA implementation and related requirements. Elizabeth has also managed NEPA documents for numerous federal agencies and has a proven ability to direct teams of resource specialists to provide thorough, defensible analyses under compressed schedules. Her clients and project teams value her ability to provide NEPA compliance advice and strategies that meet the intent of NEPA but also enable projects to stay on schedule.

Education
  • B.S., Environmental Science, University of Ulster, Ireland
  • Certificate, Area Studies, University of Nantes, France

Insights

Article
Understanding Phase 2 NEPA regulations
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Article
Accelerating the approval process for offshore wind development
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Article
Using GIS to map a favorable future for renewable projects
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Article
New amendments to NEPA in the Fiscal Responsibility Act of 2023
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Article
New greenhouse gas guidance for federal agencies
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Article
CEQ publishes Phase 1 changes to NEPA
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Article
Additional changes to NEPA proposed—and more to come
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Article
President Biden’s early actions on environmental policy and their relevance to the National Environmental Policy Act (NEPA)
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Paper
NEPA reset: A review of CEQ's sweeping changes to the NEPA regulations
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Article
Does President Trump’s executive order mean no more environmental regulations?
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Article
A review of the CEQ's proposed revisions to the NEPA regulations
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