Hunt Valley, Maryland (25 February 2026)—EA is proud to announce the appointment of Mahsa Modiri, PhD, PE, as National Service Line Program Manager for Emerging Science and Innovation, including contaminants of emerging concern (CEC) and per- and polyfluoroalkyl substances (PFAS). In this role, Modiri will focus on integrating cutting-edge science, innovative approaches, and business strategy, ensuring that innovative technical solutions are effectively delivered to clients facing complex environmental challenges. Her responsibilities span opportunity identification, marketing and capture strategy, proposal development, project delivery, and program oversight of the firm’s growing portfolio of research and development initiatives.
“Mahsa is a widely recognized industry expert and leader with strong visibility across the CEC community—particularly PFAS—and extensive experience spanning the lifecycle of environmental projects,” said Brian Lesinski, Executive Vice President and Chief of Client Programs. “Her deep technical expertise, dedication to innovation, and client focus will continue to elevate our capabilities and impact across EA.”
With 16 years of professional experience in environmental engineering and chemistry, Modiri brings a wealth of experience to her new role. She has led high-impact research funded by the Water Research Foundation, the U.S. Environmental Protection Agency, and for the U.S. Department of Defense through the Strategic Environmental Research and Development Program and Environmental Security Technology Certification Program. Modiri has authored more than 30 peer-reviewed publications and has been actively engaged in publishing research on PFAS treatment, monitoring strategies, and regulatory advancements. Her current focus on the development of innovative strategies tailored to complex contamination scenarios will directly improve remediation outcomes.
“My work has always focused on translating emerging science into practical, scalable solutions for complex environmental problems,” said Modiri. “This role allows me to bring together technical innovation, strategic planning, and collaboration to support clients facing evolving challenges—from PFAS and other emerging contaminants to broader climate and resource concerns. I’m excited to help advance EA’s leadership in emerging science and innovation while delivering solutions that are both technically rigorous and implementable.”
Modiri’s impressive academic background includes a BS in Civil Engineering, a MS in Water Engineering, and a PhD in Environmental Engineering. She has completed 3 years of post-doctoral research and is a licensed PE. Modiri has strong environmental analytical skills and has developed advanced analytical methods for the detection of CECs for complex environmental matrices including samples from aqueous film-forming foam-impacted sites, fire training areas, contaminated groundwater plumes, and wastewater treatment plants including biosolids. As part of her academic career, she developed nNiFe–activated carbon reactive nanocomposites for PFAS defluorination, supported by comprehensive mass-balance evaluations and assessments of formation of products of incomplete destruction. Building on these experiences, her current work places a strong emphasis on full life-cycle assessment and is directly aligned with her technical leadership and quality review of full-scale projects.
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