39 mechanical process engineer jobs at 29 companies in Leesburg, VA
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Water/Wastewater Process Mechanical Engineer
Fairfax, Virginia, United States
$90k-$185k/yr OnsiteFull Time
5+ YOEBachelor's in Mechanical/Civil/Chemical Engineering,5+ years designing process piping and mechanical systems for water/wastewater facilities,AutoCAD and Microsoft Office proficiency,PE in VA preferred.
AutoCAD, Microsoft Office, Revit
2mo
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Mid-Level Process Mechanical Designer
Pittsburgh or Philadelphia or Columbus or Independence or Troy or Cincinnati or Saint Paul or Milwaukee or Andover or Syracuse or Virginia Beach or Alexandria or Columbia or Richmond
$64k-$105k/yr HybridFull Time
4+ YOE4+ years in process mechanical design; proficient in Revit and AutoCAD; P&ID coordination; piping design; project design gates; mentoring.
Revit, AutoCAD, P&ID, Microstation?
1mo
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Staff Mechanical Engineer
Indian Head, Maryland, United States
$87k-$115k/yr OnsiteFull Time
0+ YOEBachelor's in mechanical engineering (or related) with 2–4 years (or Master's with 0–2 years); U.S. citizenship and ability to obtain an Interim Secret clearance; experience with energetic materials, process safety, project management, and strong communication skills.
1d
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Senior Process Engineer - Equipment
Harmans or Baltimore or Washington
$94k-$128k/yr OnsiteFull Time
4+ YOEBachelor's degree or higher in engineering and 4+ years of GMP or biopharma maintenance/engineering experience. Requires mechanical, electrical, automation, sterile manufacturing, cGMP, troubleshooting, and documentation expertise.
Computerized Maintenance Management System (CMMS), Standard Operating Procedures (SOPs), Supervisory Control and Data Acquisition (SCADA)
3mo
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Senior Process Technology Engineer
Georgetown, Texas, United States
$150k-$190k/yr OnsiteFull Time
10+ YOEBachelor's or Master's in chemical/mechanical eng or chemistry; 10+ years process engineering; pilot-plant experience; capital projects leadership; process simulation proficiency; travel willingness.
Aspen Plus, HYSYS, UniSim, PFDs, P&IDs, HAZOP
1mo
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Senior Mechanical Engineer – 3D Facility Characterization
Albuquerque or Chantilly
OnsiteFull Time
10+ YOEBachelor's in engineering required (advanced degree preferred), 10+ years engineering experience with 3D geometric modeling, CAD, LiDAR/point-cloud processing, Hydrocode/FEA/CFD prep, and an active TS/SCI clearance.
LiDAR, 3D CAD, SolidWorks, Creo, Autodesk, Hydrocode, Finite Element Analysis (FEA), Computational Fluid Dynamics (CFD), HPAC, VLSTRACK, CloudCompare, Cyclone, Structure-from-Motion (SfM), Synthetic Aperture Radar (SAR), Python, MATLAB, LS-DYNA, ANSYS Autodyn, CTH
2d
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Device Assembly Process Engineer
Gaithersburg, Maryland, United States
$79k-$119k/yr OnsiteFull Time
5+ YOERequires a Mechanical Engineering, Biomedical Engineering, related engineering, or pharmaceutical science degree and 5+ years' experience with a bachelor's or 2+ years' experience with a master's, plus medical device or combination product expertise.
QbD
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Mechanical & Structural Engineer Manager (Virtual)
Manassas, Virginia, United States
$128k-$199k/yr RemoteFull Time
Manages mechanical and structural engineering employees, oversees technical approaches and processes, leads improvements, and manages stakeholder relationships. U.S. Person status and ability to obtain U.S. Secret Clearance required.
1mo
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FAB Engineer (Wet Process)
Manassas, Virginia, United States
OnsiteFull Time
Bachelor's in engineering (Chemical, Electrical, Mechanical or related) preferred; experience with statistical analysis, FMEA/8D/SPC, failure analysis, process/equipment/material optimization, product quality escalation, and data collection/analysis.
FMEA, 8D, SPC, R2R, ECN, GCP, TPM, PDR
1w
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2026 Intern Conversion - Materials and Process Engineer I
Seattle or Van Horn or Denver or Huntsville or Florida or Arlington or Los Angeles or Longmont or Reston or United States
$75k-$114k/yr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
Completed a 2026 Blue Origin internship; enrolled in or recently graduating from college; minimum B.S. in mechanical, aerospace, or astronautical engineering; strong communication and teamwork skills; U.S. work authorization required.
Defense Biometric Identification System (DBIDS)
2w
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Senior Commissioning / Construction Support Engineer (Wastewater Process Facilities)
Alexandria or Washington
$130k-$190k/yr FieldFull Time
8+ YOERequires 8–15+ years in wastewater, industrial, or process facilities; commissioning/startup experience; process, mechanical, electrical, controls, and SCADA knowledge; and active construction-site experience.
SCADA
2w
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Manufacturing Area Engineer
Front Royal, Virginia, United States
$90k-$100k/yr OnsiteFull Time
5+ YOEMechanical/Chemical engineering degree preferred or 5 years project engineering experience; industrial chemical processing experience preferred; strong communication, analytical and presentation skills; ability to coordinate mechanical/process/electrical design.
SAP, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Microsoft Access, Microsoft Project, Microsoft Visio, Microsoft Outlook, Microsoft SharePoint
1mo
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Resident Engineer
Washington or Baltimore
$80k-$100k/yr OnsiteFull Time
4+ YOEBA/BS in mechanical, electrical, or civil/structural engineering plus 4 years' related experience or equivalent; PE or ability to obtain within 1 year; OSHA 10; experience with wastewater construction and mechanical process equipment.
PMIS- e-Builder
2d
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Manufacturing Engineer
Clarksburg, Maryland, United States
$115k-$140k/yr OnsiteFull Time
3+ YOEBachelor’s degree in mechanical, manufacturing, industrial, or related engineering; 3–6 years manufacturing engineering experience; CAD, process documentation, assembly, 8D problem-solving, and cross-functional production support experience.
Computer-Aided Design (CAD), Inventor, SolidWorks, Creo, 8D, Process Failure Mode and Effects Analysis (PFMEA), Six Sigma, Lean
1mo
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Manufacturing Engineer
Germantown, Maryland, United States
$69k-$90k/yr OnsiteFull Time
0+ YOEBachelor’s degree in mechanical or manufacturing engineering, up to 2 years’ relevant experience, SolidWorks or equivalent 3D CAD, GD&T, engineering drawings, manufacturing processes, ERP/BOM knowledge, and U.S. citizenship.
SolidWorks, 3D CAD, GD&T, ERP, BOM
1mo
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Senior Systems Engineer
Fort Belvoir, Virginia, United States
$113k-$238k/yr OnsiteFull Time
8+ YOEActive Secret clearance, BS in Systems Engineering and 8+ years experience; subject-matter expertise in systems engineering, FLIR/electro-optical systems, mechanical experience, and DOD acquisition processes.
1mo
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Water/Wastewater Project Manager - Process Mechanical
Richmond or Fairfax
$131k-$169k/yr OnsiteFull Time
10+ YOEBachelor's in engineering, PE in Virginia, 10+ years water/wastewater experience, project management (scope/schedule/budget), technical design and client development skills.
1mo
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Manufacturing Engineer
Germantown, Maryland, United States
$69k-$90k/yr OnsiteFull Time
0+ YOEBachelor's in Mechanical or Manufacturing Engineering, up to 2 years relevant experience, SolidWorks and ERP proficiency, knowledge of GD&T and manufacturing processes, U.S. citizenship and active/obtainable DOD security clearance required.
SolidWorks, ERP, BOM, GD&T
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New Products Manufacturing Engineer
Sparrows Point or Baltimore or Washington
$74k-$174k/yr OnsiteFull Time
3+ YOEBachelor's degree in mechanical engineering or related field, 3–5 years of engineering experience, 3D CAD and 2D drawing proficiency, manufacturing process knowledge, MS Office proficiency, and willingness to work in an industrial environment.
Microsoft Office, 3D CAD, Oracle ERP, Windchill PLM, Autodesk Inventor, AutoCAD
1w
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New Products Manufacturing Engineer
Sparrows Point or Baltimore or Washington
$74k-$174k/yr OnsiteFull Time
3+ YOEBachelor's degree in mechanical engineering or related field, 3–5 years of related engineering experience, 3D CAD and 2D drawing proficiency, manufacturing process knowledge, MS Office proficiency, and industrial tool use.
3D CAD, Microsoft Office, Oracle ERP, Windchill PLM, Autodesk Inventor, AutoCAD, 3D printing
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