Associate Principal , Process Mechanical
Sky Mavis
About LJC LJC Design & Engineering (LJC) is a full‑service architecture, engineering, and design firm committed to enhancing the quality of the human experience through integrated design. We are a team of high‑energy professionals who share a passion for design, a collaborative approach, and a casual culture. The Role This role is ideal for a highly technical engineering leader with strong industrial process knowledge, sound engineering judgment, and an entrepreneurial mindset. You will lead process design efforts for complex industrial projects, collaborating closely with multidisciplinary teams to deliver safe, efficient, and innovative process solutions that align with our clients’ operational goals. Specifics of the Role Lead process engineering design efforts for pet food, meat processing, and industrial manufacturing projects Develop project scopes and establish process design basis documentation Create and review Process Flow Diagrams (PFDs), material balances, and Piping & Instrumentation Diagrams (P&IDs) Specify process mechanical equipment and support instrumentation design activities Collaborate with discipline leads to ensure successful implementation of process designs across all project phases Interpret plant operating data and develop process solutions, often utilizing engineering assumptions and judgment in early project stages Ensure process systems are designed safely, efficiently, and in alignment with client operational requirements Utilize and enhance internal engineering tools and standards to support execution efficiency Perform process calculations and simulations using software such as AFT Fathom, AFT Arrow, HTRI, and similar process engineering tools Coordinate with vendors, clients, and internal teams to support equipment selection, process integration, and project execution Support construction, commissioning, startup, and troubleshooting activities as needed Mentor junior engineering staff and contribute to the development of engineering best practices Requirements Bachelor of Science in Chemical Engineering or Mechanical Engineering from an ABET‑accredited university or college 8–15+ years of experience in process engineering within industrial manufacturing environments Successfully passed the Professional Engineer (PE) exam Strong understanding of process engineering principles, industrial systems, and process safety Experience developing PFDs, P&IDs, process calculations, and equipment specifications Familiarity with lean manufacturing or lean process methodologies Experience with field construction support, commissioning, and process startup activities preferred Strong engineering judgment and ability to design effectively with incomplete or evolving information Excellent communication, leadership, and collaboration skills Entrepreneurial mindset with the ability to thrive in a fast‑paced, design‑build environment Benefits Discretionary annual bonus subject to company and individual performance Comprehensive benefits package including medical, dental and vision plans, 401(k), generous PTO and paid holidays, employee assistance program, flexible spending accounts, life insurance, disability coverage, learning & development programs and more Compensation Salary range for this position is determined by factors such as education, qualifications, skills, training, experience, certifications, internal equity, and location. Compensation decisions are made on a case‑by‑case basis. #J-18808-Ljbffr Sky Mavis
- ...looking for an experienced Senior Mechanical Engineer to join our... ...rigorous design and analysis processes using the most up-to-date technologies... ...the business unit managing principal and the technology division... ...industry organizations and associations.Maintain a high level of...PrincipalMechanicalTemporary workFor contractorsFor subcontractorLocal area
$139k - $258k
...expertise acquired in the field. The purpose of this position is to provide technical expertise in multiple areas of Process Technology or Mechanical Systems Engineering design. The role leads other engineers in executing project assignments and may oversee several teams...PrincipalMechanicalContract workFor contractorsLocal area- ...Mechanical Engineer Responsible for supporting regional capital investment projects in the Americas Region, specifically at our site... ...to support manufacturing, engineering, HSE and marketing/sales processes in accordance with the safety, environmental, and economic...PrincipalMechanical
- Join Ross & Baruzzini as an Associate Principal in Mechanical Engineering focused on Data Center design. The ideal candidate has 15-20 years of experience... ...managing innovation projects, overseeing design processes, and enhancing leadership within engineering teams. A Bachelor...PrincipalMechanicalRemote job
$54k - $142k
...Boeing Engineering Entry-level, Associate and Mid-level Positions Company: Boeing has shaped the course of human history... ...Electronic & Electrical Engineering, Flight, Materials and Process Engineering, Mechanical / Structural Engineering, Production and Industrial...MechanicalPermanent employmentInternshipRelocationVisa sponsorshipWork visaRelocation packageFlexible hoursShift workDay shift$95.5k - $176.5k
...availability and cost of materials Practical field experience Intermediate computer and software skills to include the use of word processing, e‑mail, spreadsheet and electronic presentation programs Other Job Requirements Must be a U.S. Citizen Preferred Qualifications...PrincipalMechanicalFor contractorsLocal area- Elessent Clean Technologies Inc. seeks a Mechanical Engineer in St. Louis, Missouri. The role involves learning engineering technologies... ...specific engineering activities related to chemical and steam process equipment. Candidates should have a degree in Mechanical...Mechanical
- ...Digital Engineering practice and seeking a Principal Solutions Architect to lead high‑impact... ...outcomes. Analyze customer goals, processes, and data flows to identify required change... .... Requirements Bachelor’s degree in Mechanical Engineering, Manufacturing Engineering,...PrincipalMechanical
$54k - $142k
...Boeing Engineering Entry-level, Associate and Mid-level Positions Company: Boeing has shaped the course of human history... ...Electronic & Electrical Engineering, Flight, Materials and Process Engineering, Mechanical / Structural Engineering, Production and Industrial...MechanicalPermanent employmentFull timeInternshipRelocationVisa sponsorshipWork visaRelocation packageFlexible hoursShift workDay shift- ...maintenance technician to ensure the reliability and safety of chemical processing equipment. The role involves preventive maintenance, repairs,... ..., chillers, and agitators. The ideal candidate should have mechanical experience, preferably in the chemical industry, along with...Mechanical
$112.32k - $168.48k
...difference, there’s only one choice. Principal Electrical Engineer At Bayer Crop... ...operational value; Working closely with mechanical, software, imaging, and biological teams... ...reasonable accommodations in its application process for individuals with disabilities and...PrincipalMechanicalLocal area- ...Job Title : Principal Systems Safety Engineer Department: Systems Location: St. Louis... ...a production-grade practice, defining processes, standards, documentation, and review... ...freight rail systems, operations, and legacy mechanical/pneumatic configurations. Exposure...PrincipalMechanicalFull timeWork at office
- ...Front Desk Associate - Recreation Center The purpose of this year-round, part-time position... ...spreadsheets, scheduling and word processing software programs, Internet and email;... ...F for 1 hour) - N Subject to oils (mechanical or food) - N Required to wear a respirator...MechanicalPart timeWork at officeShift workWeekend workAfternoon shiftEarly shift
$85k - $115k
...Space & Security (BDS) team is seeking Associate Manufacturing Engineers to support... ...to develop and implement manufacturing processes for airplane subsystems. Ensure production... ...B.S. or higher in Aerospace, Civil or Mechanical Engineering Experience supporting...MechanicalPermanent employmentInterim roleImmediate startRelocationVisa sponsorshipWork visaFlexible hoursShift workDay shift$85k - $115k
...Space & Security (BDS) team is seeking Associate Manufacturing Engineers for the F-15... ...to develop and implement manufacturing processes for air vehicle subsystems Ensure production... ...or higher in Aerospace, Civil or Mechanical Engineering Experience supporting...MechanicalPermanent employmentWork experience placementInterim roleImmediate startRelocationVisa sponsorshipWork visaFlexible hoursShift workDay shift- A leading engineering design firm in St. Louis, MO is looking for a Principal Mechanical to oversee project management and design quality. The role requires a minimum of 15 years in Mechanical building systems with a Professional Engineering License. Responsibilities include...PrincipalMechanical
- ...**Job Summary**Introba is seeking a Principal, Mechanical, to join our growing team in St. Louis... ...Train staff in all phases of design process to ensure continuation of technical design... ...in seminars and / or professional associations, attend trade shows relevant to...PrincipalMechanicalContract workWork at officeLocal area
- Pretium Packaging in St. Louis, Missouri, is hiring an experienced Process Engineer to oversee injection-blow molding operations. You'll... .... The successful candidate will require a degree in mechanical or plastics engineering and practical experience in similar processes...Mechanical
- Jasurda Search Group is hiring a Process Engineer in St. Louis, MO to work for a well-established manufacturer. This hands-on role demands... ...-blow molding. Ideal candidates will hold a degree in Mechanical or Plastics Engineering, possess experience with relevant machinery...Mechanical
- ...Missouri, is seeking a highly technical engineering leader to lead process design efforts in industrial projects. This role involves... ...operations. The ideal candidate has a Bachelor's in Chemical or Mechanical Engineering, 8-15+ years of industry experience, and a strong...Mechanical
$24 - $43 per hour
...eligible to work in the US. Your Role The Associate Production Scientist - 1st shift at our... ...handles flammable solvents and is a process safety managed (PSM) area. Employees must... ...environments and in close proximity to moving mechanical parts. Who You Are Minimum...MechanicalImmediate startMonday to FridayShift workDay shift$25 - $45 per hour
...standards of quality and compliance in our ADC manufacturing processes. As an Associate Production Scientist - Night Shift you will manufacture... ...Experience with Microsoft Office (Word, Outlook, Excel, etc.). Mechanical and troubleshooting skills. Knowledge of cGMP and ICH...MechanicalContract workWork at officeShift workNight shift$80k - $120k
CORTEX EPCM LLC is seeking a Process Engineer in St. Louis, MO. The successful candidate will develop and design mechanical processes for industrial systems, ensuring effective communication and collaboration among engineering teams and clients. This full-time role requires...MechanicalFull time- ...Process Engineer Location: St. Louis, MO 63132 ** Must be a U.S. Citizen and currently based in the St. Louis market... ...personnel and vendors Qualifications Bachelor's or associate's degree in Mechanical Engineering, Plastics Engineering, or a related field...Mechanical
- Senior Water/Wastewater Process Engineer/Project Manager This position offers an exciting... ..., including pumping, process and mechanical piping, and related valves and process... ...participation in related professional associations a plus. Requirements M.S., B.S. in Environmental...Mechanical
- ...Pretium Packaging is searching for a talented, hands-on Process Engineer for our plant in St. Louis, Missouri. About... ...best efficiency. What you’ll bring: Bachelor’s or associate’s degree in mechanical/plastics engineering or related field. Reheat blow...Mechanical
- Principal Continuous Improvement Engineer Date: May 13, 2026 Location: St. Louis, MO, United... ...efficient, sustainable and repeatable processes using Six Sigma, Lean and advanced... ...indoors and outdoors with exposure to mechanical/moving parts, hazards including corrosive...PrincipalMechanical
- ...where you belong. We are looking for a passionate and dedicated Process Mechanical Lead Engineer in Missouri. As part of our team, you’ll have... .... This will include specifications and plan development associated with pumping stations and treatment plant upgrades and expansions...MechanicalWork at officeRemote workWorldwide
$139k - $258k
Fluor Corp is seeking a highly experienced engineer to lead process teams on various projects, specifically focusing on Nuclear Island... .... Applicants must hold an accredited degree in Chemical or Mechanical Engineering and possess at least 18 years of relevant experience...MechanicalLocal area- ...Northwest HealthCare in St. Louis is offering a full-time Evening Lab Associate position. This role requires a positive attitude and a... ...performing key laboratory tasks, like phlebotomy and specimen processing. Minimum qualifications include a High School Diploma or GED,...Full timeAfternoon shift
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