Wastewater Process Engineer

CREW; New Haven (CT); On-site; USD 85,000 - 130,000; Full time

Job summary

CREW Carbon is seeking a Wastewater Process Engineer to design, optimize, and implement CREW’s process-intensification and carbon-removal systems at municipal or industrial facilities.

You will work across Tech, Ops, and Product teams, develop PFDs and mass balances, and help deploy pilot and full-scale projects, traveling to deployment sites as needed.

The role offers a hands-on startup environment with growth opportunities in NY/CT and beyond.

Qualifications

• Bachelor’s degree in Environmental, Chemical, Civil Engineering or related field.
• 5–8+ years of wastewater process engineering experience.
• Strong understanding of wastewater treatment processes including nutrient removal and pH control.
• Experience developing PFDs, P&IDs, site layouts, mass balances, and process unit design.
• Willingness to travel to deployment sites.

Responsibilities

• Develop process flow diagrams, mass and energy balances, and dosing designs.
• Translate lab results and field data into insights, reports and actions.
• Collaborate with Technology to address process issues and perform analyses.
• Lead wastewater process and process-mechanical support during engagements.
• Set process optimization and carbon removal targets with Operations.
• Own documentation, training, and design input for internal and external teams.
• Support new projects including alkalinity dosing integration.
• Inform project strategy with Commercial Team.
• Stay current on trends in wastewater treatment and sustainability.

Skills

Process engineering

PFDs & P&IDs

Mass & energy balances

Alkalinity control

Process optimization

Travel flexibility

Education

Bachelor's degree in Environmental/Chemical/Civil Engineering or related field

Master's or PhD (bonus)

Tools

BioWin

SUMO

GPS-X

MATLAB

AutoCAD

Civil 3D

Revit

Job description

About CREW Carbon

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. Today, we help wastewater treatment facilities and operators:

• Improve the efficiency of existing, legacy infrastructure
• Eliminate hazardous chemicals & reduce operational costs
• Avoid $100M+ infrastructure upgrades
• Capture & Store CO₂

We are currently deploying this technology across the US. In addition, we’ve signed $33M+ in carbon removal offtake agreements with leading corporations, including JP Morgan, Google, and Stripe who are looking to meet their climate goals, supercharging CREW’s expansion.

About the role

As a Wastewater Process Engineer at CREW Carbon, you will contribute to process design, optimization, and 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 design and optimize dosing systems that achieve both treatment efficiency and measurable greenhouse gas.

You will facilitate CREW’s scientific and engineering innovations into scalable, real-world systems. Working between the Tech, Ops, and Product 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.

This position is a full-time role. Location will be onsite at our office in Brooklyn, NY or New Haven, CT.

Responsibilities

• Develop process flow diagrams, mass and energy balances, and dosing system designs to meet project goals.
• Coordinate with the Technology and Operations teams to translate lab results and field data into insights and actions, including technical presentations/reports, data-driven operating decisions, and recommendations.
• Collaborate with the Technology team to 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 lead 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.
• Champion operational and process insights to inform project development strategy with the Commercial Team.
• Stay current on emerging trends in wastewater treatment, process intensification, sustainability, and environmental technology.

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 $30M+ 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.