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Unisim Jobs (NOW HIRING)

$98K - $128K/yr

Advanced proficiency in process engineering, with a strong focus on Aspen HYSYS; experience with ProMax, UniSim, VGMSim, or similar simulation tools is an asset * A proven ability to lead engineering ...

UniSim * HYSYS Dynamics * Aspen Plus * Aspen Custom Modeler * PIPENET * PIPESIM * SPS * Experience with Operator Training Simulators (OTS) and other engineering simulation tools is a plus ...

Proficient in process modeling using Unisim, AspenPlus or equivalent software package. * Prior experience with HyCO plants, Hydrogen and/or Carbon Monoxide, is preferred. * Ability to effectively ...

Proficiency of process simulation software, primarily Honeywell's UniSim software. WE VALUE * Advanced engineering degrees like Chemical Engineering. * 15+ years of experience in chemical engineering ...

Knowledgeable in the areas of process simulation (i.e., HYSYS/ UniSim), plant layout, equipment sizing, Reliability, Availability and Maintainability (RAM) modeling, LNG storage, and shipping ...

Experience with HYSYS, Unisim, ProMax, and/or VMG Symmetry and proficiency in Microsoft Office Suite, including Word, Outlook, and Excel. * Ability to self-direct and have a sense of responsibility ...

Lead Process Engineer

Houston, TX · On-site

$125K - $156K/yr

Proficiency of process simulation software, primarily Honeywell's UniSim software. WE VALUE * Advanced engineering degrees like Chemical Engineering. * 15+ years of experience in chemical engineering ...

Proficiency of process simulation software, primarily Honeywell's UniSim software. WE VALUE * Advanced engineering degrees like Chemical Engineering. * 15+ years of experience in chemical engineering ...

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How much do unisim jobs pay per hour?

As of Jun 18, 2026, the average hourly pay for unisim in the United States is $13.97, according to ZipRecruiter salary data. Most workers in this role earn between $12.50 and $15.38 per hour, depending on experience, location, and employer.

What are Unisim jobs?

Unisim jobs typically refer to positions that involve working with UniSim, a process simulation software used primarily in the chemical, oil & gas, and process industries. Professionals in these roles use UniSim to model, simulate, and optimize process operations, helping organizations improve efficiency, safety, and profitability. Common UniSim job titles include process engineer, simulation specialist, and process modeling engineer. These jobs require a solid background in chemical engineering, process optimization, and familiarity with simulation tools like UniSim. Employers value candidates with strong analytical skills, attention to detail, and experience in industrial process environments.

What are some common challenges faced by professionals working with Unisim simulation software, and how can they be addressed?

Professionals using Unisim often encounter challenges related to modeling complex processes accurately and integrating simulation results into real-world operations. Navigating the software's advanced features can require a solid understanding of both process engineering and the tool itself, which may necessitate ongoing training. Collaboration with process engineers, IT teams, and operations staff is crucial to ensure simulations reflect actual plant conditions and to validate results. Regularly updating models and maintaining clear documentation can help address these challenges and improve overall project outcomes.

What are the key skills and qualifications needed to thrive as a Unisim Engineer, and why are they important?

To thrive as a Unisim Engineer, you need a solid background in chemical or process engineering, strong analytical skills, and typically a relevant engineering degree. Proficiency in AspenTech's UniSim process simulation software and familiarity with related industry tools are essential. Attention to detail, problem-solving ability, and effective communication are key soft skills for collaborating with multidisciplinary teams and optimizing process designs. These skills ensure accurate simulations, efficient plant operations, and successful project outcomes in process industries.

What is the difference between Unisim vs Process Engineer?

AspectUnisimProcess Engineer
CredentialsTypically requires chemical engineering background, certifications in simulation softwareRequires chemical engineering degree, professional engineering license often preferred
Work EnvironmentPrimarily software-based, working in offices or remoteIndustrial plants, refineries, or manufacturing facilities
Industry UsageUsed for process simulation, design, and optimizationDesign, develop, and optimize industrial processes

Unisim is a simulation software used by engineers to model and optimize chemical processes, while a Process Engineer applies engineering principles to develop and improve industrial processes. Both roles often require chemical engineering credentials, but Unisim focuses on software expertise, whereas Process Engineers work directly in industrial settings.

More about Unisim jobs
Infographic showing various Unisim job openings in the United States as of June 2026, with employment types broken down into 89% Full Time, and 11% Contract. Highlights an 94% Physical, and 6% Remote job distribution, with an average salary of $29,053 per year, or $14 per hour.

Senior Process Technology Engineer

Sea Dragon Energy

Georgetown, TX

$150K - $190K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 27 days ago


Job description

We are seeking a highly experienced Senior Process Technology Engineer to play a pivotal role in advancing our seawater-to-jet fuel pilot plant and preparing the technology for commercial scale-up. This is a hands-on technical leadership position focused on operational excellence, capital project execution, and technology evaluation in the emerging Power-to-Liquid / e-fuels sector. The ideal candidate will bring deep process engineering expertise, preferably in carbon capture, syngas chemistry, or synthetic fuel production and will thrive in a dynamic, fast-paced environment where pilot-scale innovation directly informs multi-million-dollar scale-up decisions.
What We Offer
• The opportunity to shape the future of sustainable aviation fuel at the intersection of cutting-edge science and commercial deployment.
• Competitive compensation package:
• Salary $150K - $190K annual
• Health, Dental, and Vision Insurance
• Short- and Long-Term Disability and Term Life Plan
• 401(k) retirement plan with employer contribution
• Paid Time Off (PTO)
• Paid Holidays and Sick Leave
• A collaborative, mission-driven culture focused on innovation and climate impact.
Key Responsibilities
1

Operational Technical Support for a Seawater-to-Jet Fuel Pilot Plant (Direct Ocean Capture)
• Deliver process engineering support to ensure safe, reliable, and optimized operation of the pilot facility.
• Troubleshoot process upsets, perform root-cause analysis, and implement corrective actions for key unit operations including CO capture, hydrogen production/integration, syngas synthesis, Fischer-Tropsch synthesis, and product upgrading.
• Monitor process data, develop and maintain performance metrics, and drive continuous improvement initiatives to increase yield, reduce downtime, and improve energy efficiency.
• Support HAZOPs, safety reviews, and management-of-change (MOC) processes for pilot-plant modifications.• Collaborate closely with operations, maintenance, and analytical teams to translate pilot data into actionable insights.
2. Leadership of CAPEX Projects (up to $5-100 million)
• Lead multidisciplinary capital projects from concept through commissioning, including feasibility studies, front-end engineering design (FEED), detailed design, procurement, construction, and start-up.
• Develop project scopes, cost estimates, schedules, and risk registers; ensure projects are delivered on time, on budget, and meet technical and safety requirements.
• Manage external engineering firms, vendors, and contractors while maintaining strict cost and schedule control.
• Conduct post-project evaluations and capture lessons learned to refine future scale-up strategies.
3. Identification and Vetting of Critical Technologies for Future Scale-Up
• Scout, evaluate, and recommend emerging and commercially ready technologies in CO capture/utilization, hydrogen integration, synthesis gas generation, synthetic fuel synthesis, and downstream refining/upgrading.
• Assist in techno-economic analyses (TEA) modeling, technology readiness level (TRL) assessments, and risk evaluations to support go/no-go decisions for scale-up deployment.
• Build and maintain technology roadmaps that align pilot learnings with commercial plant design basis.
• Establish and manage relationships with technology providers, universities, and research organizations.
• Prepare technical reports, white papers, and presentations for internal stakeholders and potential investors or partners.
Required Qualifications
• Bachelor's or Master's degree in chemical engineering or mechanical engineering (or equivalent).
• Minimum 10 years of progressive process engineering or process technology experience in the chemical, petrochemical, refining, or energy industries.
• Demonstrated experience in pilot-plant or demonstration-scale operations, preferably involving high-pressure, high-temperature, or gas-to-liquids processes.
• Proven track record leading capital projects valued up to $5 million (or equivalent scope).• Strong working knowledge of process simulation tools (Aspen Plus/HYSYS, UniSim, or equivalent), process flow diagrams (PFDs), P&IDs, and heat & material balance development.
• Excellent analytical, problem-solving, and communication skills with the ability to influence cross-functional teams.
• Ability to travel occasionally to vendor sites, testing facilities, or future commercial locations (estimated 10-30%).
Preferred Qualifications
• Direct experience in Sustainable Aviation Fuel (SAF), CO capture and utilization (CCU), Power-to-Liquid (PtL), Fischer-Tropsch synthesis, or related synthetic fuel / carbon-recycling technologies.
• Background in hydrogen production, electrolysis integration, and/or gas purification systems.
• Familiarity with relevant industry standards (API, ASME, NFPA) and process safety management (PSM).
• Experience working in a startup or scale-up environment is highly desirable.