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Unisim Jobs (NOW HIRING)

Melland Consulting, LLC

Senior Process Engineer

Houston, TX · On-site

$90 - $120/hr

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  • PTO

Hands-on experience with Aspen HYSYS and/or UniSim * Strong understanding of: * Heat & material balances * Refrigeration cycles * Gas separation processes Key ResponsibilitiesCryogenic Process ...

Semiserve

Process Engineer

Houston, TX · On-site

Experience with process simulation software (Honeywell UniSim, HYSYS, Promax, etc.). * Three or more years of technical experience with PSV calculations or working within a chemical plant.

Nimblemind.ai

Proposal EngineerNewOn-Site

Houston, TX · On-site

$80 - $100/hr

Familiarity with process simulation and design tools such as ProMax (preferred), Aspen HYSYS, Aspen Plus, UNISIM. * Experience producing engineering deliverables such as PFDs, P&IDs, equipment ...

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Bedrock

Process Engineer III

Houston, TX · On-site

Experience with process simulation software (Honeywell UniSim, HYSYS, Promax, etc.). * Three or more years of technical experience with PSV calculations or working within a chemical plant.

Socket.dev

Senior Engineer, Production

Arlington, VA · On-site

$158 - $186/hr

Familiarity with Microsoft Office 365 Application Suite, process modeling tools such as Unisim/Aspen HYSYS, AI models (e.g. neural networks) * Some basic programming skills is a plus (C++, Python etc.

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How much do unisim jobs pay per hour?

As of Aug 20, 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 is a Unisim job?

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 the key skills and qualifications needed to thrive as a Unisim engineer?

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 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 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.

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Unisim jobs near you
Infographic showing various Unisim job openings in the United States as of August 2026, with employment types broken down into 94% Full Time, and 6% Contract. Highlights an 94% Physical, 3% Hybrid, and 3% Remote job distribution, with an average salary of $29,053 per year, or $14 per hour.

Engineer, Senior Field Process (Mont Belvieu, TX)

Enterprise Products

Mont Belvieu, TX • On-site

Full-time

Re-posted 11 days ago

Enterprise Products rating

9.2

Company rating: 9.2 out of 10

Based on 40 frontline employees who took The Breakroom Quiz

1st of 53 rated energy and utility

Job description

Description
Enterprise Products Partners L.P. is one of the largest publicly traded partnerships and a leading North American provider of midstream energy services to producers and consumers of natural gas, NGLs, crude oil, refined products and petrochemicals. Our services include: natural gas gathering, treating, processing, transportation and storage; NGL transportation, fractionation, storage and import and export terminals; crude oil gathering, transportation, storage and terminals; petrochemical and refined products transportation, storage and terminals; and a marine transportation business that operates primarily on the United States inland and Intracoastal Waterway systems. The partnership's assets include approximately 50,000 miles of pipelines; 260 million barrels of storage capacity for NGLs, crude oil, refined products and petrochemicals; and 14 billion cubic feet of natural gas storage capacity.
The Senior Field Process Engineer provides process engineering and technical support for the operation of Enterprise's plants and pipelines in the Houston region. The Engineer, under the direction of the Manager and more senior engineers, ensures that facility upgrades and changes are designed and constructed in accordance with the Company's Engineering guidelines and Specifications, Industry Codes & Standards, and Regulatory Agency requirements while also meeting functionality and performance requirements. In addition, the Engineer will provide process designs for sustaining and expansion capital projects driven my Operational, Commercial and Optimization needs.
The Senior Field Process Engineer will be assigned to specific production units and pipelines to provide support to Operations, Maintenance, Commercial, and Distribution. The Engineer will provide technical expertise and scope developments for expansion and improvement projects at Mont Belvieu. Responsibilities include, but are not limited to:
  • Provide technical support to the Company's Operations, Maintenance, and Commercial departments.
  • Troubleshoot plant issues and develop recommended remediation plans and designs.
  • Perform plant simulations to establish baselines, simulate modifications and estimate performance enhancements to existing plant facilities.
  • Perform and check design calculations for sizing of equipment, control valves, lines and PSVs.
  • Prepare project design scopes in support of capital projects, commercial development, and plant optimization.
  • Participate in reviews of designs prepared by outside engineering contractors, vendors, fabricators, and manufacturers.
  • Participate in PHA/HAZOP review meetings.
  • Monitor field construction activities to ensure compliance with contract drawings and specifications.
  • Perform Pre-Startup Safety Reviews (PSSRs) and progress Project Management of Change.
  • Support Field Environmental and Safety with development of emissions/release calculations.

Qualifications
The successful candidate will meet the following qualifications:
  • BS in Chemical Engineering is required.
  • A minimum of five years of experience in a refinery/chemical plant environment or related industry engineering within a continuous production facility is required.
  • Experience with distillation, light hydrocarbons, petrochemical, Pipelines. Underground Storage is a plus.
  • Familiarity with API Standards and OSHA 1910.119 (PSM),
  • Proficiency in basic PC skills (MS Word, Excel, Outlook) is required.
  • Process modeling software such as Unisim or equivalent. Experience with Unisim is preferred.
  • Strong interpersonal and communication skills, with the ability to either work alone or as part of a team are essential.
  • Must be proficient in balancing multi priorities and activities and meet deliverable.
  • Ability to handle multiple fast-paced projects with constantly changing priorities and scope.
  • Ability to quickly absorb the key deliverables and not get mired in details.

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