Senior Process Modeling Engineer

Via Separations is a Boston-area startup dedicated to enabling process efficiency and intensification for the industrial sector. In 2024, Via delivered its first commercial facility and changed the narrative around market-driven energy technologies that drive value for industrial customers.  At the intersection of engineering, society, and impact, our team is passionate about making a difference and building the technology and organization to do it.  We are a fast-paced, interdisciplinary team backed by leading venture capital firms, and we are looking to add talented, mission-driven people to our cohort. 

We are passionate about transformative impact, optimistic about scientific progress, and unafraid of hard problems. We believe that our people are our unfair advantage, and drive our mission forward. We embrace the diversity of our team for creative solutions and believe the best ideas come from the intersection of disciplines and perspectives. We want you to join us!

Role Description

Via Separations is commercializing the first industrial-scale implementation of Graphene Oxide-based membranes. As a Senior Process Modeling Engineer, you will play a key role in the design and optimization of complex industrial systems by leveraging advanced modeling and simulation tools.

In this role, you will focus on the development, analysis, and refinement of detailed process models that drive our technology’s integration into customer operations. Your work will span early-stage process concept development through to preliminary commercial system design, with a strong emphasis on dynamic modeling, optimization, and technical strategy. Occasional travel (~10%) is typical for all Via employees to support development and customer related activities.

• Develop and refine process simulation models using tools like Aspen Plus, Aspen HYSYS, ChemCAD, or equivalent
• Perform rigorous mass and energy balances, process dynamics, and optimization studies to support system development
• Translate lab-scale data and pilot system results into scalable process design.
• Collaborate in developing and updating process design documentation (PFDs, P&IDs, specifications) with process and systems engineering teams
• Conduct process sensitivity and scenario analyses to evaluate performance across operating conditions
• Assist in developing control strategies and performance specifications informed by dynamic modeling
• Support continuous improvement activities for operating facilities from a modeling and analytical perspective

• Bachelor’s degree in chemical engineering with 5–8 years of relevant experience, or an advanced degree with 2–3+ years of work experience
• Proven experience with process simulation and modeling tools (e.g., Aspen Plus, Aspen HYSYS, ChemCAD)
• Deep understanding of thermodynamics, transport phenomena, and unit operations
• Experience developing or scaling process systems in industries such as oil & gas, chemicals, or advanced separations
• Strong analytical and problem-solving skills; able to synthesize experimental data and model insights into actionable designs
• Excellent communication and organizational skills; Able to clearly express and critique ideas
• Some travel (up to 10%) may be required
• U.S. Work authorization is required for this role.

• Competitive compensation package, including equity options
• Medical, Dental & Vision Insurance
• Disability & Life Insurance
• 401(k)
• 12+ weeks of paid Family Leave
• Flexible PTO
• Paid time off for Company holidays

Studies have shown that women and people of color are less likely to apply for jobs unless they believe they can perform every job description task. We are most interested in finding the best candidate for the job, and that candidate may come from a less traditional background. Via may consider an equivalent combination of knowledge, skills, education, and experience to meet minimum qualifications. If you are interested in applying, we encourage you to think broadly about your background and skill set for the role!

At Via, we value and prioritize diversity of thought, access, and experiences, and are an equal opportunity employer by choice. We consider all qualified applicants equally for employment. We do not discriminate on the basis of race, color, national origin, ancestry, citizenship status, protected veteran status, religion, physical or mental disability, marital status, sex, sexual orientation, gender identity or expression, age, or any other basis protected by law, ordinance, or regulation.