Leslie Gillespie-Marthaler

About Leslie Gillespie-Marthaler

Deloitte allows me to leverage my extensive expertise in water infrastructure within a deeply resourced team structure to address complex municipal, regional, and federal challenges. With a focus on safe drinking water, clean water, and stormwater systems, I collaborate with diverse teams to deliver innovative, sustainable solutions. My role emphasizes partnerships, regulatory insight, and financial strategy to ensure long-term infrastructure resilience. Over a decade of experience spanning government leadership and consulting drives my commitment to environmental health and community well-being. At the U.S. EPA, I led multi-state environmental initiatives, managed over $1.1 billion in federal funds, and facilitated impactful stakeholder collaborations. My work reflects a passion for integrating engineering, planning, and finance into actionable strategies for a healthier and more sustainable future.

Experience

1. Specialist Leader Sustainable Water Infrastructure

   Deloitte

   Jul 2025 — Present · Philadelphia, PA, US

   In my role at Deloitte, I leverage expertise from a highly skilled team along with my own extensive experience in engineering, finance, systems integration, and planning to tackle pressing water infrastructure issues. By focusing on sustainable solutions, I successfully enhance water quality and accessibility for communities. My collaborative efforts with municipalities, water authorities, and government entities lead to delivery of high impact solutions that address state, regional, and federal water needs.

Education

• United States Military Academy at West Point

  Bachelor of Science - BS

• Vanderbilt University

  Doctor of Philosophy - PhD

  2015 — 2019

• The George Washington University

  Professional Degree

• Georgia Institute of Technology

  Master of Science - MS