Key Personnel

The primary role for each of our executives and managers is to ensure our clients’ projects are delivered safely, on-time, and on-budget.  The E&E Construction Team has highly skilled professionals who bring a diverse range of expertise to the table.  They are often called upon by our clients for their valuable input relating to designs and constructability in the early stages of the project cycle.  

To put it simply, our team is here to provide the highest level of service, to be accessible at all times, and to help your project achieve the best possible results.


Hass, Devon

Devon Hass


As E&E’s founding owner, Devon Hass has more than 30 years of construction experience – with 25 of those years spent working specifically in the environmental remediation and construction industries. Devon possesses in-depth experience across many related fields, including working with the installation and repair of treatment systems, electrical installation, piping, boring, trenching, and concrete work. Devon has delivered an abundance of projects in a Project Management role, using his extensive application area knowledge to ensure risks are mitigated and the project goals and objectives are met. Devon is often retained by consulting companies to provide input and oversight on projects from a constructability perspective.

Harding, James

James Harding


James Harding has been an owner of E&E since 2010. In addition to his duties as CFO, James continues to perform a key role in the company’s business development, where he maintains close relationships with each and every client at all levels. James has been extremely successful in formulating an acute understanding of each client’s custom needs, helping to ensure all projects are presented and ultimately delivered to the client’s satisfaction. James also assists in the ongoing development of E&E’s Health and Safety programs, constantly improving practices and methodologies working to ensure E&E’s ongoing safety record remains as one of the best in the entire industry. Working closely with Devon, James continues to proactively expand E&E’s suite of deliverables and geographical footprint.

Magdaleno, Tino 3

Tino Magdaleno

Operations Manager

Tino Magdaleno has over 30 years in key roles within the environmental remediation and general construction industries and is responsible for running operations throughout E&E. Tino’s extensive technical expertise includes: soil and groundwater remediation; treatment systems installation; decontamination, decommissioning & demolition; heavy earthwork; site preparation and civil construction. To further supplement Tino’s acute understanding and effectiveness in his role here at E&E, he also brings to the table hands-on experience with Project Management, Site Superintendence and Costs Estimation. Tino’s ability to facilitate seamless processes, communications and project execution throughout the company, while ultimately ensuring paramount safety practices and client satisfaction, makes him a firm favorite with colleagues and customers alike.

Wall, Ken

Ken Wall

Sr. Project Manager

Ken is an industrial engineer, and project management professional with 25 years of combined environmental consulting and construction management experience. Ken has performed detailed planning and execution of complex projects consisting of remediation (ex-situ and in-situ) and civil construction, characterization, permitting and regulatory compliance. Ken has substantial experience with the Department of Toxic Substance Control (DTSC), the South Coast Air Quality Management District (SCAQMD) and the Los Angeles Regional Water Quality Control Board (LARWQCB). Complimenting his background is extensive waste disposal, permitting, contract administration (commercial, federal, public works), and technical and project controls data management.

Colera, Tony

Tony Colera

Sr. Project Manager

Tony has managed a multitude of construction, remediation, operation and maintenance projects with a successful track record of executing projects for his clients within budget and on schedule. Tony has 23 years’ experience managing or contributing to engineering design for remediation, environmental site characterization, remedial investigations, and feasibility study evaluations, serving a number of active, inactive, and/or abandoned landfills including the management of operations and regulatory compliance of a 250-acre CERCLA/Superfund facility under a closure consent decree between responsible parties and agency regulators. Tony is a Qualified Industrial Stormwater Practitioner and also serves as the safety officer overseeing more than 200,000 labor hours of incident-free performance.

Weber, Charlie

Charlie Weber

Sr. Construction Manager

Charlie Weber possesses 23 years of environmental construction experience, responsible for overseeing and delivering many hundreds of projects, including complete remediation systems installations, ongoing O&M, demolition & decommissioning, electrical and general construction tasks. Charlie also has an extensive refinery, landfill, and military experience, overseeing the installation of water treatment systems, soil vapor probes, dual phase extraction, landfill gas, and sprinkler cover systems, barracks retrofits and has performed work at a multitude of gas station properties. Additionally, Charlie provides construction support to project managers and also for special assignments, including hands-on construction management, training, and technical advice.


Dave Purdy

Project Manager

Dave Purdy is a project management professional with nearly 25 years of combined environmental consulting and management experience.  Dave performs budget development, detailed planning, permitting and oversight for complex projects which include the design, construction, and demolition of remediation systems and also the removal of underground storage tanks and fueling systems. His experience also includes managing operations and maintenance of remediation systems along with discharge permitting and compliance. Dave has many years of experience in working closely with a multitude of agencies, including the Los Angeles and San Diego Regional Water Quality Control Boards, (RWQCB) Orange County Health Care Agency (OCHCA), South Coast Air Quality Management District (SCAQMD), and the San Diego Air Pollution Control District.

Roels, John

John Roels

Sr. Estimator

John Roels has over 30 years’ experience in general and environmental construction. His expertise includes project estimating and management of multiple crews, ranging from small-scale to large-scale environmental and general construction activities. John has performed detailed planning, budget development, and execution of complex projects consisting of remediation (ex-situ and in-situ) and civil construction. While working with our clients, John provides Project Proposals, Rough Order of Magnitude (ROM) pricing, and project durations. John also has extensive experience with Treatment System Installation, Excavation, Demolition, UST Removal/Upgrades, and Hazardous Waste Characterization / Removal.

Winegarner, Trish

Trish Winegarner

Office Manager

Trish Winegarner has more than 25 years’ experience performing key management roles within complex office environments, with more than a decade specifically applied within the environmental construction industry. Trish plays a key role in the ongoing development of highly effective custom operational procedures for the continued improvement of business rules and procedures, data management, payroll, filing systems and many other critical functions to ensure paramount ability to support projects and meet not only the requirements of E&E business goals but also those of its clients. Her warm and approachable personality make her a favorite with staff and clients alike.


Looking to join our team?