Formation Environmental is led by senior-level scientists and engineers with 20 or more years of consulting experience in related disciplines of the environmental consulting industry.  Our dedicated and experienced group of senior-level professionals is supported by more than 25 project- and staff-level individuals with expertise in a variety of disciplines, including:

  • Engineering
  • Biology/Ecology
  • Risk Assessment
  • Geoscience
  • Data Management and Data Analysis
  • Regulatory and Policy Analysis



Brian G. Hansen, M.E., P.E., P.G., Partner / Geological Engineer

Mr. Hansen has over 30 years of experience in the fields of geological engineering and hydrogeology. He has served as project manager, testifying expert, RI/FS and EE/CA expert, Engineer of Record, and regulatory liaison on various mining impacted sites. He specializes in groundwater and surface water interaction with acid-generating mine spoil, and designing best management practices for mine spoil closures. He is a registered Professional Engineer in Arkansas, Colorado, Idaho, Montana, Nevada, and Washington.


Andrew C. Koulermos, M.S., Partner / Chemical Engineer

Andy has 23 years of environmental consulting experience.  He has served as project manager on a variety of projects, including CERCLA RI/FS, remedial design and remedial action at a range of mining, mineral processing, and river/sediment sites.  In addition, Andy has also consulted at numerous industrial sites including secondary lead smelters, lead-acid battery manufacturers, chemical plants, refineries, aluminum smelters, aluminum and phosphate ore processors, and steel mills.  His work at these facilities has included design and implementation of wastewater treatment units (metals and inorganics), waste management and disposal (solid waste and RCRA), spill prevention plan preparation and implementation, TMDLs,  chemical fate and transport in river settings, evaluation of chemical transport in stormwater and wastewater discharge permitting.


Mark Dunn Lewis, Ph.D., Partner / Biologist / Risk Assessor

Mark has 23 years of experience in environmental consulting, with emphasis on human and ecological toxicology and risk assessment, and natural resource damage assessments.  He has been project manager or technical lead for complex remedial investigations, feasibility studies, risk assessments, impact assessments, mitigation planning, and similar projects.  Many of the sites have involved multiple agencies and public stakeholder groups.  Most recently, Mark has focused on ecological risk assessment and Natural Resources Damage Assessment at sediment and wetland sites.  He is currently a technical lead in assessing risk from bio-accumulative pesticides for the Comprehensive Everglades Restoration Program in Florida.  He is a key member of the Formation team assisting the Port of Portland (OR) in identifying natural resource restoration opportunities for number of sites along the Willamette River.


Brian Schmid, M.S., Partner / Soil Scientist / Agronomist

Brian specializes in the development and application of remotely sensed technologies and geospatial techniques to map and predict soil/agronomic parameters over large land areas. Specifically, Brian has developed unique applications that leverage remote sensing and geospatial technologies to accurately map, describe, and report land surface conditions as they pertain to agricultural production, precision agriculture, soil remediation, and environmental objectives.  Specifically, Brian leverages advanced agronomic crop modeling tools (Decision Support System for Agrotechnology Transfer) combined with remotely sensed data resources to simulate and predict yield for several major grain crops.  Brian also has significant experience in the integration of advanced statistical data mining and machine learning techniques with remotely sensed data to map and predict plant community classes, identify invasive species, determine percent cover, and quantify other land cover features.


Robbert-Paul Smit, M.S., Partner / Environmental Chemist

Robbert-Paul has 17 years of experience in environmental consulting and provides project management and technical expertise for the strategic planning and implementation of CERCLA environmental investigations and response actions.  Robbert-Paul‘s expertise includes the design and implementation of multi-disciplinary investigations to evaluate nature and extent of environmental contamination; the analysis of geological, hydrological, geotechnical, geophysical and geochemical data to evaluate contaminant transport; feasibility studies; and design and implementation of CERCLA response actions.


Peter H. Townsend, M.E., Partner / Geological Engineer / Hydrogeologist

Pete has 25 years of experience as a consulting hydrogeologist and engineer.  He specializes in hydrogeologic characterization, ground-water flow modeling, contaminant transport modeling, environmental data management, environmental statistics, and geographic information systems.  He applies these skills to a range of projects, including ground-water resource development, environmental litigation, strategic planning, remedial investigations, and remedial design.  Pete excels in areas that make project teams a success, including his ability to work efficiently with geographically dispersed teams and his ability to build consensus with stakeholders through clear communication and sound technical rationale.  His project responsibilities include project management, technical lead/support, client interaction, stakeholder communication, staff and subcontractor supervision, scheduling, and budget tracking.


Steven A. Werner, M.S., Partner / Environmental Engineer

Steve has 37 years of experience in project planning and project management/strategy for large-scale, multi-disciplinary Remedial Investigations, Feasibility Studies, and remedial design programs.  He has served in various roles at some of the more prominent environmental sites across the country.  Over the last 20 years, Steve has focused on fate and transport issues related to Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA-Superfund) Response Actions and Natural Resources Damage (NRD) at sites with watershed-scale historical releases.  Steve’s involvement in resolution of Superfund and NRD issues at these sites includes cooperative settlements, mediation, arbitration and litigation.





Buz Cotton, M.E., P.E., Geological Engineer / Hydrogeologist

Buz has 25 years of experience in engineering and environmental consulting.  His background has developed primarily from work as a project engineer, project hydrogeologist and/or project manager on site characterization, environmental remediation, and water resource projects.  Buz’s technical expertise includes: design and implementation of field investigation and subsurface characterization programs; analysis of geological, hydrological, geotechnical, geophysical and geochemical data; analytical and numerical modeling of saturated and unsaturated ground water flow and contaminant transport; remediation feasibility studies; and the design of groundwater remediation and monitoring systems.


Marty C. Petach, M.S., GIS Analyst

Marty has 24 years of experience using Geographic Information Systems (GIS) to analyze and display spatial and temporal trends for a broad range of environmental issues.  He builds and populates environmental sampling databases using MS Access, PostGRES/PostGIS, and ArcGIS to efficiently manage spatial data, including: interpolation of point sampling data to continuous surfaces; spatial intersection of multiple datasets; volumetric calculations; and image analysis and pattern extraction from remotely sensed data.  He writes customized computer programs to automate and document data processing, especially for litigation projects; uses GIS to focus and simplify complex patterns at projects sites; performs precise statistical analysis and accounting calculations; and depicts pertinent site conditions in an effective manner using high quality maps, technical animations, 3D visualizations, and interactive web sites.  Marty has also served as a technical expert to support litigation.

Joseph M. Allen, M.S., Wildlife Biologist / Risk Assessor

Joe has 16 years of experience in  environmental consulting with an emphasis in risk assessment, wildlife biology, and statistical analysis.  Joe provides project management and technical expertise in a number of disciplines, including: aquatic and terrestrial ecological risk assessment; field investigation design and data interpretation; data management; and statistical analysis.  Most recently, Joe has been the project manager and primary investigator for a number of studies and assessments involving the cleanup of persistent and bio-accumulative agrochemicals for the Comprehensive Everglades Restoration Program in south Florida.  He is also the ecological risk assessment task manager for several large mine-site risk assessments in the western U.S.


Sean M. Covington, M.S., Aquatic Toxicologist / Risk Assessor

Sean has 20 years of experience in environmental consulting with an emphasis in ecology and toxicology in aquatic systems.  His experience stems from numerous field studies conducted to examine a range of physical, chemical, and biological perturbations in aquatic systems  and evaluate the quality of aquatic ecosystem conditions.  These types of studies have been used for biosurvey/biocriteria monitoring, ecological risk assessments, T&E species evaluations, natural resource damage assessments, use attainability analysis, TMDL development, NPDES permit compliance, NEPA assessments, and numeric chemical criteria and standards development.  He has managed numerous Texas TRRP risk assessments and has been the aquatic technical lead on several CERCLA ecologial risk assessments across the western U.S.  He is currently the project manager for developing a site-specific water-quality criterion for selenium at a mine site in Idaho.


Kathryn J. Tegtmeyer, Ph.D., Geochemist

Kathy has 23 years of consulting experience and provides project management and senior technical expertise for environmental investigation, remediation, monitoring, and risk assessment projects.  Kathy has extensive experience evaluating and identifying sources of metals contamination at former smelting and refining sites, industrial facilities, and railroad properties and in surrounding residential communities.  She is currently the technical lead for remedial investigation of a former smelting/refining site in Montana and manages an RI/FS project at a former phosphate mine in southeastern Idaho.  Her work includes geochemical data collection and interpretation, geochemical fate and transport modeling, metals speciation, metals mobility and bioavailability studies, natural attenuation assessment, geologic and hydrogeologic characterization, statistical data analysis, decision rules and decision analysis support, and stable and radiogenic isotope systematics and isotopic-tracer investigations.

George Paul, Ph.D., Agronomist / Agricultural Engineer

George is a biophysically-oriented systems scientist with extensive professional experience in field measurements, remote sensing and numerical modeling of soil, plant, and hydrologic processes. George has 10 years of experience focused on modeling spatio-temporal aspects of soil-water-plant-environment processes and their interactions with changing climate. He has been the lead scientist on projects involving irrigation performance, crop modeling, soil heat flux, soil-water conservation, rainfall-runoff modeling, evapotranspiration (ET) modeling, spatial biophysical modeling, climate change impact-adaptation modeling, and drought-flood studies. George has extensive experience in analyzing big data including weather, soil, satellite and surface flux datasets for managing and supporting agricultural operations. He has developed research programs within the arena of agriculture systems dynamics/resilience with focus on sustainable production especially for regions with limited water resources. George is an expert in ET research. He has evaluated and incorporated improvements to major remote sensing based surface energy balance algorithms including SEBAL, METRIC, SEBS, and TSM. He has developed a computing framework for generating daily ET maps from satellite data (Landsat and MODIS) which is being used by several state agencies in their water management programs. He was the community leader of the ET measurement and modeling community in the American Society of Agronomy and presently he is the Vice Leader of Global Climate Change community.

Dane Williams, Remote Sensing Analyst / Spatial Solutions Consultant

Dane has 21 years experience developing solutions through Remote Sensing science in the environmental consulting realm, leveraging Remote Sensing and GIS technologies to assess, analyze, and manage decision-making for a myriad of applications. Dane works closely with agronomist/soil scientists/engineers to develop complex remote sensing algorithms which, paired with agronomic expertise, are applied to discriminate agricultural activity, production, yield and yield estimation, crop rotation, and vegetative stress. Methodologies developed focus on both field-based and region-based agricultural analysis. Other remote sensing applications developed include, though not limited to, object-based imagery analysis algorithms, submerged aquatic vegetation classification, invasive species identification, multi-decade vegetation type/extent studies, LiDAR-based forest canopy structure analysis, quantification of vegetative cover percentages by habitat type, and periodic surface wetness analysis.  Experience with multiple GIS and RS systems and architectures. He has utilized RS data products including multispectral, hyperspectral, RADAR, LiDAR, and thermal products obtained from satellite, airborne, and terrestrial platforms.platforms.

Chuan-Shin Chong, M.S., Remote Sensing and Geospatial Developer

Chuan-Shin specializes in developing solutions through remote sensing and geospatial techniques. He is skilled in big data handling, image analysis and database management across diverse industries including forestry, environmental, and agricultural. He specializes in utilizing open source tools and software programs to automate complex processes. He has utilized various types of remotely sensed data including multispectral, hyperspectral, LiDAR and thermal products in both pixel and object-based analysis. Chuan-Shin works closely with agronomist/soil scientists/engineers/foresters/farmers and uses statistical data mining, machine learning techniques and time series analysis to develop solutions for complex problems. Remote sensing applications developed include, though not limited to, forest species mapping, timber age mapping, quantifying forest change, surface wetness analysis, quantifying vegetation cover, historical dune mapping, estimating evapotranspiration using METRIC, underwater soil type mapping using acoustic technology, site compliance monitoring, playa and shoreline monitoring, in-season field condition (LAI and percent nitrogen) modeling, and crop mapping (grape, walnut, corn, soybean, wheat, sugarcane, palm oil, rice and almond). Chuan-Shin also has a significant role in research and new technology development.

Yen-Ben Cheng, Ph.D., Remote Sensing Scientist

Ben is a remote sensing scientist with academic background in hydrology, ecology and agriculture. The focus of Ben’s work is utilizing remote sensing and geospatial technologies to answer ecological, environmental, and agricultural questions. Specifically, Ben is experienced in retrievals of plant biochemical, biophysical, and physiological properties from multispectral and hyperspectral measurements acquired at field, airborne, and spaceborne level. Ben has served in multiple NASA missions and projects that utilizes remote sensing observations to monitor and model ecohydrological and environmental processes. Specifically, he has led multiple interdisciplinary tasks and studies that applies state-of-art techniques to provide critical land surface parameterization from local to regional scale. Ben also has extensive experience in instrument calibration and deployment, data acquisition, remote sensing data preprocessing, analysis, and classification, statistical analysis including machine learning and data mining, algorithm development, model implementation, and product prototyping.

Clint Kellar, Software Developer / GIS Analyst

Clint has 20 years of experience in designing, analyzing, and deploying solutions that leverage Geographic Information Systems (GIS). His technical expertise includes complex spatial analysis and modeling, application development, and enterprise GIS system design. Clint has a passion for building solutions that turn complex problems into easy to use and feature-rich solutions. His communication skills come from experience with stakeholder and customer communications, workflow and requirements gathering based upon client’s needs, and providing technical training. His experience also includes serving as a project manager, technical lead, and staff supervisor.