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Process Modeling Engineer Jobs in Leesburg, VA (NOW HIRING)

GFT.

Wastewater Treatment Process Engineer

Fairfax, VA · On-site

$80K - $180K/yr

This role follows a hybrid work model, requiring regular attendance at one of our many offices ... engineer involved with planning and/or process evaluation of wastewater treatment facilities

GFT.

Wastewater Treatment Process Engineer

Fairfax, VA · On-site

$80K - $180K/yr

This role follows a hybrid work model, requiring regular attendance at one of our many offices ... engineer involved with planning and/or process evaluation of wastewater treatment facilities

APEX TK

Modeling and Simulation Engineer

Chantilly, VA · On-site

APEX TK is seeking a highly motivated and skilled Modeling & Simulation Engineer to join our team ... Develop code / scripts to develop algorithms, perform analyses, and automate data processing to ...

USM

Appian Developer / Integrator

Mclean, VA · On-site

... Engineering, Business Intelligence, Data Management, SOA, BPM, Data Warehousing, SharePoint ... process modeling and optimization techniques, including orchestration of modeled process Some ...

USM

Sr Appian Developer

Reston, VA

... Engineering, Business Intelligence, Data Management, SOA, BPM, Data Warehousing, SharePoint ... process modeling and optimization techniques, including orchestration of modeled process Some ...

GFT.

Water Treatment Process Engineer

Fairfax, VA · On-site

$80K - $180K/yr

This role follows a hybrid work model, requiring regular attendance at one of our many offices ... water engineer involved with planning and/or process evaluation for potable water treatment ...

GFT.

Water Treatment Process Engineer

Fairfax, VA · On-site

$80K - $180K/yr

This role follows a hybrid work model, requiring regular attendance at one of our many offices ... water engineer involved with planning and/or process evaluation for potable water treatment ...

GFT.

Water Treatment Process Engineer

Fairfax, VA · On-site

$80K - $180K/yr

This role follows a hybrid work model, requiring regular attendance at one of our many offices ... water engineer involved with planning and/or process evaluation for potable water treatment ...

SAIC

RF Modeling/Simulation Analyst

Chantilly, VA · On-site

$80K - $120K/yr

Modeling/Sim Engr Schedule: Full-Time Shift: Day Job Travel: Yes - 10% of the time Minimum ... processing RF signals related to communications and radar applications. This position will help ...

KBR, Inc.

Modeling and Simulation Engineer

Chantilly, VA · On-site

$121K - $151K/yr

Title: Modeling and Simulation Engineer Belong. Connect. Grow. with KBR! KBR's National Security ... Provides pre- and post-algorithm implementation and process analysis and modeling * Provides ...

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Showing results 41-60

All JobsProcess Modeling Engineer JobsProcess Modeling Engineer Jobs in Leesburg, VA

Process Modeling Engineer information

See Leesburg, VA salary details

$50.1K

$93.1K

$144.1K

How much do process modeling engineer jobs pay per year?

As of Sep 14, 2026, the average yearly pay for process modeling engineer in Leesburg, VA is $93,073.00, according to ZipRecruiter salary data. Most workers in this role earn between $75,400.00 and $104,200.00 per year, depending on experience, location, and employer.

What does a process modeling engineer do?

A Process Modeling Engineer is responsible for designing, analyzing, and optimizing processes within industries such as manufacturing, chemical production, or energy. They use mathematical models and simulation software to predict how processes will perform under various conditions. By creating digital models, they help improve efficiency, reduce costs, and ensure safety and quality standards are met. Their work often involves collaborating with other engineers and stakeholders to implement improvements based on data-driven insights.

What are the key skills and qualifications needed to thrive as a process modeling engineer?

To thrive as a Process Modeling Engineer, you need a strong background in chemical or process engineering, analytical problem-solving skills, and typically a relevant engineering degree. Familiarity with process simulation software such as Aspen Plus, HYSYS, or MATLAB, and understanding of industry standards are crucial for effective modeling and analysis. Strong communication, teamwork, and project management skills help you collaborate with cross-functional teams and convey complex technical information. These skills ensure accurate process optimization, efficient project execution, and drive operational improvements in manufacturing or industrial environments.

What are some typical challenges faced by process modeling engineers when collaborating with cross-functional teams?

Process Modeling Engineers often work closely with teams from operations, R&D, and IT to develop and refine models that optimize manufacturing or chemical processes. A common challenge is translating complex technical data into actionable insights that are easily understood by non-engineering stakeholders. Effective communication and adaptability are key, as project requirements can evolve rapidly and may require balancing competing priorities. Building strong relationships and maintaining open channels for feedback help ensure that process models align with both technical standards and business goals.

What is the difference between Process Modeling Engineer vs Process Improvement Specialist?

AspectProcess Modeling EngineerProcess Improvement Specialist
Required CredentialsBachelor's in Engineering, Industrial Engineering, or related field; proficiency in process modeling softwareBachelor's in Engineering, Business, or related field; certifications like Six Sigma often preferred
Work EnvironmentEngineering teams, manufacturing plants, or R&D labsOperational teams, manufacturing facilities, or corporate offices
Employer & Industry UsageManufacturing, aerospace, automotive, and industrial sectorsManufacturing, healthcare, logistics, and service industries

The Process Modeling Engineer focuses on creating detailed process models using specialized software to optimize workflows. In contrast, the Process Improvement Specialist concentrates on analyzing existing processes and implementing improvements, often utilizing methodologies like Six Sigma. Both roles require similar educational backgrounds but differ in their primary focus and tools used.

What cities near Leesburg, VA are hiring for Process Modeling Engineer jobs?

Cities near Leesburg, VA with the most Process Modeling Engineer job openings:

Process Modeling Engineer jobs near you
Infographic showing various Process Modeling Engineer job openings in Leesburg, VA as of August 2026, with employment types broken down into 1% As Needed, 76% Full Time, 19% Part Time, 3% Contract, and 1% Nights. Highlights an 92% Physical, 2% Hybrid, and 6% Remote job distribution, with an average salary of $93,073 per year, or $44.7 per hour.

Wastewater Treatment Process Engineer

Fairfax, VA • On-site

GFT.
Construction • 1 - 5K employees
Learn more about GFT.external

$80K - $180K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 12 days ago

Key responsibilities

  • Lead and support the design and evaluation of wastewater treatment processes, including process assessments and facility design.

  • Conduct site visits, analyze data, and develop treatment process recommendations to optimize treatment performance.

  • Plan and execute studies (bench, pilot, full-scale), assess results, and prepare reports to inform process improvements.

Job description

GFT is seeking a Wastewater Treatment Process Engineer to join our Water team! This role follows a hybrid work model, requiring regular attendance at one of our many offices.
What you'll be challenged to do:
In this role you will lead and support design of wastewater treatment through evaluation of existing processes and facilities; treatment assessments; design of improvements, expansions, and new facilities; permitting; and construction administration. Responsibilities will include conducting site visits, completing treatment studies and developing treatment process recommendations, preparing reports and design documents, and supporting permitting efforts.
In this capacity, the successful candidate will be responsible for the following:
  • System Design:Lead and support the planning and process evaluation of wastewater processes, including biological nutrient removal, sludge handling, and filtration processes.
  • Process Optimization:Conduct site visits and investigations; analyze influent wastewater characteristics, facility design, and operating data to assess treatment performance; and provide recommendations for treatment and process improvements.
  • Studies and Evaluation:Plan and execute bench, pilot, and full-scale studies to meet project goals; assess test results and facility operating data to develop process recommendations; and preparation of required reports.
  • Technical:Function as a technical specialist in the areas of conventional and advanced wastewater treatment. Use processes such as physical/chemical primary treatment, conventional activated sludge, biological nutrient removal, fixed-film processes, membrane bio-reactors (MBR), sidestream treatment, tertiary filtration, auxiliary wet-weather treatment, and disinfection

What you will bring to our firm:
  • BS in Civil, Environmental, Chemical Engineering (MS is preferred)
  • Professional Engineer Licensed required (PE) or the ability to obtain in 6-12 months
  • 4+ years of experience required in wastewater treatment discipline, particularly as a wastewater engineer involved with planning and/or process evaluation of wastewater treatment facilities
  • Expert knowledge in standard engineering techniques and procedures.
  • EPC project experience preferred; design and construction of wastewater treatment facilities, including three or more years leading process design of wastewater projects with full responsibility for the budget, schedule, contractual obligations, client service, and quality standards preferred.
  • Demonstrated experience and knowledge in preliminary treatment, primary treatment, biological treatment (including BNR), disinfection, hydraulics, and solids processing and handling preferred.
  • Successful track record leading wastewater process and plant facilities projects background and the willingness to take on new challenges.

What we prefer:
  • Experience with biological modeling software such as BioWin, GPS-X, and Sumo.
  • Experience working directly with Environmental Regulators (i,e. NJDEP, PADEP, MDE, NYDOH etc).

Compensation:
The salary range for this role is $80,000 - $180,000. Salary is dependent upon experience and geographic location.
Featured Benefits:
• Hybrid (in-person and remote) work environment.
• Comprehensive benefits package including wellness programs, parental leave, and pet insurance, in addition to medical, dental, vision, disability, and life insurance.
• Tax-deferred 401(k) savings plan.
• Competitive paid-time-off (PTO) accrual.
• Tuition reimbursement for continued education.
• Commitment to professional development, access to internal and external training programs, and support of active participation in professional organizations
• Incentive compensation for eligible positions.
At GFT, a privately held AEC firm, we innovate where transportation, water, power, and buildings converge. We call this the Infrastructure of Life. We measure our success by the strength of our relationships - that's why we're the employer of choice for 5,000+ of the industry's brightest engineers, planners, architects, inspectors, designers, and more.
Our clients choose us for our expertise and prefer us for our nimble approach, creativity, and personal touch. Backed by over a century's experience, together we're building a lasting legacy for future generations: stronger communities, a healthier planet, and better lives.
GFT: Ingenuity That Shapes Lives™ is an Equal Opportunity Employer. All qualified candidates will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veterans' status or other characteristics protected by law.
Unsolicited resumes from third party agencies will be considered the property GFT.
GFT does require the successful completion of a criminal background check for all advertised positions.
Location: Fairfax, NewPort News, Richmond, or Virginia Beach, VA; Raleigh, NC; Baltimore or Owings Mills, MD
Core Business Hours: 8:00 AM - 5:00 PM
Employment Status: Full-Time
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