Wastewater Process Engineer

About the Role

As a Wastewater Process Engineer at CREW, you will contribute to process design, biological treatment data analysis, optimization, as well as technical implementation of CREW’s process intensification and carbon removal systems at wastewater treatment facilities. You will use your knowledge of process modeling and engineering, aqueous chemistry, and wastewater operations to help the company achieve both treatment goals and greenhouse gas removal.

You will facilitate CREW’s scientific and engineering innovations into scalable, real-world systems. Working between the R&D, Ops, and Platform teams, you will analyze and interpret lab and operational process data from CREW’s deployments to identify opportunities and drive action and optimizations. This will include designing and refining process flow diagrams, developing mass and energy balances, supporting demonstration and full-scale deployments, troubleshooting process performance in the field, documenting protocols, and driving customer success at partner sites.

This is an ideal opportunity for a process-minded, mission-driven engineer who thrives at the intersection of environmental technology and practical system design.

Responsibilities

• Develop process flow diagrams, mass and energy balances, and dosing system designs to meet project goals.

• Coordinate with the R&D and Operations teams to translate lab results and field data into insights and actions, including technical presentations/reports, data-driven operating decisions, and recommendations.

• Address process issues and propose technical solutions to wastewater partners, which could include process modeling, technical engineering analyses, data analyses, etc.

• Serve as a technical touch-point for wastewater process and process-mechanical support during partner engagements, to foster satisfaction and confidence in system performance.

• Work with the Operations team to set process optimization and carbon removal targets.

• Own technical documentation, training, and design input to internal teams and external partners. Contribute to continuous improvement initiatives, standardization of design templates, and lessons-learned captured across deployments.

• Support new project development, including alkalinity dosing design, integration into existing facility systems, and process control strategy.

Experience Requirements

• Bachelor’s degree (required) in Environmental Engineering, Chemical Engineering, Civil Engineering, or a related field; a Master’s or PhD degree is a bonus.

• 5–8+ years of experience in wastewater process engineering, biological treatment design, or related fields (municipal or industrial).

• Strong understanding of wastewater treatment processes, including nutrient removal, solids handling, and pH and alkalinity control.

• Experience developing and reviewing PFDs, P&IDs, site layouts, mass balance calculations, and process unit design.

• Comfortable working in a rapidly evolving startup setting and able to quickly synthesize new information to proactively adjust focus and maintain high-impact results.

• Ability to travel periodically to deployment sites.

• You practice extreme ownership (no task is too small).

• You love being in the trenches with your team and working with high empathy.

• You have a growth mindset.

Bonus Qualifications

• Familiarity with process modeling tools (BioWin, SUMO, GPS-X, MATLAB, or equivalent).

• Experience in carbon capture, carbonate chemistry, or water-chemistry-based carbon removal technologies.

• Field experience with pilot systems, process commissioning, or operational troubleshooting is highly desirable.

• Experience integrating instrumentation, controls, and monitoring systems for process optimization.

• Experience with CAD software, including AutoCAD, Civil 3D, or Revit.

Compensation

Compensation at the time of offer is unique to each candidate and based on a variety of factors such as skill set, experience, qualifications, and work location. Salary is one part of the total compensation and benefits package. Other benefits for eligible employees may include: equity through the form of option grants, flexible paid time off, 401(k) plan, well equipped office environment, and health benefits offerings.

The expected base salary range for this role is $85,000 – $130,000. This range represents the company’s estimate for this position at the time of posting however actual compensation may vary based on skills, experience, location, role scope, and business needs.

About the Company

CREW’s technology and services make wastewater treatment cheaper and more efficient, while permanently sequestering CO₂.

Leveraging advanced chemistry, natural minerals, and AI, we’ve developed and are deploying a category-defining process intensification technology, with decarbonization at its core. We are currently deploying this technology across the US and Europe. In addition, we’ve signed $40M+ in carbon removal offtake agreements with leading corporations looking to meet their climate goals, supercharging geographical CREW’s expansion.

CREW has offices and labs in New Haven, CT and offices in Brooklyn, NY.

CREW Insights

• CREW raises $25M of funding to scale wastewater treatment optimization technology as climate solution

• A climate fix that could cut your water bill (The Wall Street Journal)

• Leading U.S. water utility HRSD partners with CREW to deploy process intensification technology (Wastewater Digest)

• The Colorado Energy Office awards $2.35M to CREW’s wastewater treatment CDR tech (Carbon Herald)

• CREW signed a carbon credit offtake agreement with the Frontier Climate Fund (Reuters)

• CREW delivers pioneering wastewater alkalinity enhancement credits (Carbon Herald)

• CREW recognized as one of the most promising climate tech startups (Business Insider)

Equal Opportunity Employer

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, color, religion, national origin, gender, gender identity or expression, sexual orientation, age, marital status, veteran status, disability status, or any other protected characteristic under applicable law.