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TransTech Energy
ESI Senior Process Engineer
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What they do
A Process Engineer solves problems related to the manufacturing and use of products, including chemicals, fuel, food, and clothing. Designs new products, improves existing ones, or develops new processes for better use of existing materials. May specialize in a chemical engineering process, such as making plastics, or in an industry such as health care.
$119,356 / year median in Oregon
+8% projected growth
Job Description
Senior Process Engineer Company OverviewENERGYneering Solutions (ESI), a division of TransTech Energy, provides exceptional technical expertise in engineering and operations for the biogas utilization and management industries. Since 2007, ESI has specialized in design, construction, and operations for biogas projects that collectively produce over one million MWh of renewable electricity and over 50 million gallons of renewable vehicle fuel every year. ESI is built upon the principle of providing our clients with unmatched experience, flexibility, and follow-through.
Job OverviewThe Senior Process Engineer plays a critical technical and strategic role within ESI, working collaboratively with senior engineers, project managers, and O&M teams to advance the companys biogas utilization projects. This position requires a high level of engineering expertise, sound judgment, and the ability to translate complex process concepts into practical, highperformance system designs. The Senior Process Engineer is expected to operate with significant independence, demonstrate strong initiative, and communicate effectively across multidisciplinary teams. In addition to delivering highquality engineering work, the Senior Process Engineer will provide informed, proactive feedback to department leadership on opportunities to optimize processes, enhance system reliability, and strengthen design standards across the organization.
Reports ToThe Senior Process Engineer will report to the Mechanical Engineering and CAD Lead.
Work LocationThis is an inperson position based in either Sisters, OR (Headquarters) or Denver, CO (Satellite Office). Limited remote work may be approved at the discretion of the department lead, depending on business needs. Employees based in Denver are required to travel to the Sisters, OR headquarters at least quarterly.
Responsibilities and DutiesServe as a senior technical expert in process engineering, providing highlevel support for project development and execution across engineering services and EPC projects in the companys various end markets.
Drive effective communication and collaboration across engineering disciplines by proactively coordinating design interfaces, sharing technical insights, and ensuring alignment on process requirements throughout the project lifecycle.
Identify gaps in process design approaches, tools, and resources, and recommend improvements to department leadership to enhance efficiency, technical rigor, and project execution quality.
Provide mentorship and technical guidance to junior and midlevel engineers, supporting their development through knowledge sharing, design reviews, and constructive feedback.
Prepare complex engineering drawings and documentation for permitting, estimating, bidding, and construction, ensuring accuracy, clarity, and compliance with project and regulatory requirements.
Lead the development and review of key process engineering deliverables, including Project Design Basis documents, Block Flow Diagrams (BFDs), Process Flow Diagrams (PFDs), equipment specifications, data sheets, and Piping and Instrumentation Diagrams (P&IDs). Develop control philosophies and causeandeffect charts for advanced process systems.
Participate as a senior technical contributor in project HAZOP and other process safety reviews, offering expert insight into process hazards, operability concerns, and mitigation strategies.
Perform and validate advanced engineering calculations, including material and energy balances; valve, tank, and vessel sizing; heat exchanger, pump, and compressor sizing; and piping, control, and relief valve sizing.
Support the review and resolution of contractor RFIs, providing clear, technically sound responses that maintain design intent and project requirements.
Collaborate closely with ESIs Operations Division to troubleshoot process issues, optimize system performance, and implement improvements based on operational data and field observations.
Work crossfunctionally with other engineering disciplines and departments, ensuring integrated, highquality design solutions and consistent technical standards across projects.
Apply knowledge of ASME piping and pressure vessel codes, API, ASTM, and other relevant industry standards to ensure compliance and technical excellence in all process designs.
Use advanced thermodynamic, chemical, and physical analysis to develop and refine process systems and unit operations in accordance with contractual obligations, codes, and standards. Prepare detailed specifications and technical reports.
Perform other related duties as required to support project and organizational needs. TravelAbility and willingness to travel up to 20% Minimum QualificationsThis is a senior-level position requiring 10+ years of engineering experience.
Bachelors degree in Chemical or Petroleum Engineering from an accredited university.
Proficiency with chemical process simulation software. (Aspen, BR&E Promax or others)Valid drivers license for state of residence.
Proficient with the Microsoft Office suite of software. (Word, Excel, PowerPoint, etc.)Preferred QualificationsExperience in some of or all the following industries: Renewable Energy; Gas Processing; Chemical; Power; Waste Management; Environmental Air Quality Control Systems.
PE or FE certification or ability to obtain certification.
Proficiency in Smartsheet or other project management software.
This organization provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training.#ESI
Job OverviewThe Senior Process Engineer plays a critical technical and strategic role within ESI, working collaboratively with senior engineers, project managers, and O&M teams to advance the companys biogas utilization projects. This position requires a high level of engineering expertise, sound judgment, and the ability to translate complex process concepts into practical, highperformance system designs. The Senior Process Engineer is expected to operate with significant independence, demonstrate strong initiative, and communicate effectively across multidisciplinary teams. In addition to delivering highquality engineering work, the Senior Process Engineer will provide informed, proactive feedback to department leadership on opportunities to optimize processes, enhance system reliability, and strengthen design standards across the organization.
Reports ToThe Senior Process Engineer will report to the Mechanical Engineering and CAD Lead.
Work LocationThis is an inperson position based in either Sisters, OR (Headquarters) or Denver, CO (Satellite Office). Limited remote work may be approved at the discretion of the department lead, depending on business needs. Employees based in Denver are required to travel to the Sisters, OR headquarters at least quarterly.
Responsibilities and DutiesServe as a senior technical expert in process engineering, providing highlevel support for project development and execution across engineering services and EPC projects in the companys various end markets.
Drive effective communication and collaboration across engineering disciplines by proactively coordinating design interfaces, sharing technical insights, and ensuring alignment on process requirements throughout the project lifecycle.
Identify gaps in process design approaches, tools, and resources, and recommend improvements to department leadership to enhance efficiency, technical rigor, and project execution quality.
Provide mentorship and technical guidance to junior and midlevel engineers, supporting their development through knowledge sharing, design reviews, and constructive feedback.
Prepare complex engineering drawings and documentation for permitting, estimating, bidding, and construction, ensuring accuracy, clarity, and compliance with project and regulatory requirements.
Lead the development and review of key process engineering deliverables, including Project Design Basis documents, Block Flow Diagrams (BFDs), Process Flow Diagrams (PFDs), equipment specifications, data sheets, and Piping and Instrumentation Diagrams (P&IDs). Develop control philosophies and causeandeffect charts for advanced process systems.
Participate as a senior technical contributor in project HAZOP and other process safety reviews, offering expert insight into process hazards, operability concerns, and mitigation strategies.
Perform and validate advanced engineering calculations, including material and energy balances; valve, tank, and vessel sizing; heat exchanger, pump, and compressor sizing; and piping, control, and relief valve sizing.
Support the review and resolution of contractor RFIs, providing clear, technically sound responses that maintain design intent and project requirements.
Collaborate closely with ESIs Operations Division to troubleshoot process issues, optimize system performance, and implement improvements based on operational data and field observations.
Work crossfunctionally with other engineering disciplines and departments, ensuring integrated, highquality design solutions and consistent technical standards across projects.
Apply knowledge of ASME piping and pressure vessel codes, API, ASTM, and other relevant industry standards to ensure compliance and technical excellence in all process designs.
Use advanced thermodynamic, chemical, and physical analysis to develop and refine process systems and unit operations in accordance with contractual obligations, codes, and standards. Prepare detailed specifications and technical reports.
Perform other related duties as required to support project and organizational needs. TravelAbility and willingness to travel up to 20% Minimum QualificationsThis is a senior-level position requiring 10+ years of engineering experience.
Bachelors degree in Chemical or Petroleum Engineering from an accredited university.
Proficiency with chemical process simulation software. (Aspen, BR&E Promax or others)Valid drivers license for state of residence.
Proficient with the Microsoft Office suite of software. (Word, Excel, PowerPoint, etc.)Preferred QualificationsExperience in some of or all the following industries: Renewable Energy; Gas Processing; Chemical; Power; Waste Management; Environmental Air Quality Control Systems.
PE or FE certification or ability to obtain certification.
Proficiency in Smartsheet or other project management software.
This organization provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training.#ESI