Newly Certified


Jennifer Lundberg, CEP, Chair of the Certification Review Board, is pleased to announce the certification of the following new Certified Professionals in 2021.

Hemant Kumar TiwariCEP-IT
Certified: April 23, 2021



Hemant Kumar Tiwari, Master’s degree in Environmental Science with Gold Medal is currently working as an Environmental Engineer with Elsewedy Power (Holding Company Elsewedy Electric) with responsibility at two projects with UAE government at extension of Layyah CCPP (Combined Cycle Power Plant) 1026.3 MW under Sharjah government SEWGA (Sharjah Electricity water and Gas Authority) and later responsible for Aweer Power Station-H under the Client of Dubai Electricity & Water Authority (DEWA). Currently providing his expertise to implement the CEMP (construction environment management plan) at both the site along with the Environment aspect/impact assessment for all activity. His experienced covered Environment monitoring from sample collection to analysis as per international USEPA methods with providing effective consultancy to pollution abatement and management.

Silvia Gualdron Santos, CEP-IT
Certified: March 25, 2021



Civil Engineer with Master's Degree in Environmental Engineering with 13+ years of experience. Expertise in verification and assurance of Environmental compliance during the construction and commissioning phases of Projects within the Oil and Gas industry. Proficient in US Federal as well as TX and LA State Environmental regulations, reporting requirements, Environmental Performance and Sustainability Indicators. Skilled in Environmental plans and permits: Stormwater Pollution Prevention Plan (SWPPP), Spill Prevention Control and Countermeasure (SPCC), Hydrostatic test water, Hazardous Waste Management. Bilingual, proactive, dedicated, with leadership ability, ease in teamwork, high ethical standards and excellent interpersonal working relationships.

Emma Argiroff, CEP-IT
Certified: March 5, 2021



Ms. Argiroff is a planner who specializes in environmental review and regulatory compliance. She primarily develops National Environmental Policy Act (NEPA) documentation for FEMA hazard mitigation projects and assists with the permitting efforts for a range of projects, including the Klamath Dam Removal Project and a local stormwater retrofit. She’s been working at CDM Smith for three years. She earned her Master of Urban Planning (MUP) at the University of Washington and B.A. in Environment at the University of Michigan.

Jonathan Tatman, CEP-IT
Certified: March 5, 2021



Jonathan Tatman currently serves as a Senior Project Manager for Janus Global Operations, a Caliburn Company managing programs in support of CERCLA, RCRA and MRP tasks such as preliminary assessments, site inspections, RI/FS studies, corrective measures, and remedial designs for federal clients such as Department of State and the US Army Corps of Engineers – Huntsville. He earned his undergrad in Project Management from Columbia Southern University while serving in the United States Navy facilitating the ongoing efforts to safely and efficiently conduct MPPEH clearance activities. Jonathan has authored and lead Mercury and Lead Abatement mitigation projects for Superfund sites to include remedial activities for the removal of heavy metal contaminates in waterway sediments and upland soils, alongside the safe removal and disposal of MPPEH in cooperation with Federal and State regulators.  Jonathan was awarded the Purple Heart and Bronze Star with Valor alongside qualifying as an CBRN SME, Radiation Worker, and Environmental Health and Safety Supervisor.

Ryan Davis, CEP-IT
Certified: January 15, 2021

Ryan Davis completed both his undergraduate and graduate degree at Montana State University in Bozeman, Montana. His graduate research was within the Comparative Biological Risk Assessment Lab under Dr. Robert KD Peterson. The focus of the research was insecticide and human health risks related to mosquito control products. Ryan graduated with a Master’s of Science Degree in Entomology. While working in the graduate research lab, Ryan learned some important skills related to air quality dispersion modelling and joined the consulting world in 2007 as an air quality specialist with ICM which is an ethanol plant design firm. After leaving ICM, Ryan started his tenure at Electrical Consultants, Inc (ECI) which is a nationwide T&D engineering firm. For his first 6 years at ECI he worked as an environmental planner and permitting lead working on transmission line, substation and renewable environmental projects. In 2014, he was promoted to lead the environmental team at ECI. He currently oversees the environmental group comprised of project managers and GIS specialists at the company.

Digser Abreu, CEP-IT
Certified: January 14, 2021

Digser Abreu is currently a Senior Environmental Planner with the NYC Housing Authority (NYCHA). She focuses on overseeing the NEPA, SEQRA, and CEQR reviews for new construction and rehabilitation projects which leverage public-private partnerships. She helps secure billions in funding for energy efficiency improvements and health and safety upgrades through her role. Outside of NYCHA, Digser works alongside city and community planners and architects to support initiatives that enable quick recovery and resilience. Digser is involved in preserving public housing, creating affordable housing, and increasing community autonomy through strategies that uplift and build local capacity.