Leadership Header Photo


Jennifer Geran

Jennifer has over 30 years of experience in environmental engineering, including over 21 years of experience as a consultant serving clients primarily through environmental permitting and compliance assistance. She has developed in-depth knowledge of federal and state air pollution regulations, Title V operating permits, New Source Review (NSR) pre-construction permitting, and air dispersion modeling. Prior to beginning her consulting career, she was employed with the Texas Air Control Board and the Texas Natural Resource Conservation Commission (TNRCC) as an air dispersion modeler and as Assistant Division Director for the Air Quality Planning Division for four years. Prior to that, she was a water rights permit engineer at the Texas Water Commission (TWC) for five years. Jennifer prepares and/or supervises the preparation of permit applicability analyses, NSR and Title V air quality permit applications, permit by rule registrations, air dispersion modeling analyses, emissions inventories, spill plans, storm water plans, environmental compliance manuals, environmental recordkeeping systems, and other environmental documents for a variety of industries. She also conducts environmental audits and provides expert witness testimony in contested case hearings.

Taras Lewus

Taras has over 16 years of experience in the environmental field focused on air quality compliance, particularly for petroleum refinery, upstream oil and gas, chemical plant, and pharmaceutical production clients. He has assisted clients with state and federal air quality compliance and permitting issues, identification of emission sources, compliance auditing, quantification of emissions, and conducting Federal and state regulatory applicability analyses. His experience includes Title V permit applications, Colorado, Wyoming, Louisiana, Pennsylvania, Delaware, Texas, and Kansas state air permit applications, emission inventories, RCRA applicability analyses, and PSD & NNSR permitting and applicability analyses. Taras also has Benzene Waste Operations NESHAP (BWON) and MACT experience, including Refinery MACT I & II, OLD, Heater and Boiler, RICE, PHARMA, Halogenated Solvent Cleaner, and MON MACT. Taras has also been involved in the data collection and reporting for numerous different subparts under EPA’s Mandatory GHG Reporting Rule including 40 CFR 98 Subparts C, W, X, Y, P, and MM. Taras also has offshore oil and gas production experience. He was specifically involved with the engineering and supervision of stimulation operations offshore in the Gulf Coast.

Stephen Sexton

Stephen has 17 years of experience in the environmental compliance and permitting field specializing in air quality permitting and compliance throughout the Gulf Coast Region. His consulting background encompasses a wide variety of facilities including refineries, petrochemical plants, cogeneration facilities, and bio-fuel facilities. Stephen has worked BWON compliance issues, TAB and BQ assistance, BWON sampling and sampling plan development. In addition, Stephen has worked multiple permitting projects involving bio-fuel facilities spanning several states from the design phase until permit issuance. Stephen has also worked closely with State Agencies on permitting activities involving large scale capital projects.

Stephen specializes in air quality permitting and has prepared or assisted in preparation of many new source review permit applications in Texas, Louisiana, Georgia and Mississippi and several Title V permit applications, permits-by-rule, standard permits, voluntary emission reduction permits (VERPs) and changes-to-qualified facility (SB 1126) applications.