Skip to main content
JobDescription.orgSearch

Manufacturing

Manufacturing Chemical Engineer Job Description

Manufacturing Chemical Engineers design, optimize, and troubleshoot the chemical processes used to manufacture materials, chemicals, fuels, food, pharmaceuticals, and consumer products at industrial scale. They apply principles of thermodynamics, reaction kinetics, mass transfer, and fluid dynamics to processes that convert raw materials into products reliably, safely, and economically.

Last updated

Role at a glance

Typical education
Bachelor's degree in Chemical Engineering (BS ChE)
Typical experience
Entry-level to 5-10 years for senior roles
Key certifications
PE License, Six Sigma Green or Black Belt, HAZOP/PHA facilitator training, Aspen Plus/HYSYS certification
Top employer types
Pharmaceuticals, biotechnology, semiconductor manufacturing, petrochemicals, clean energy
Growth outlook
Positive employment growth through the late 2020s driven by pharma, materials, and clean energy
AI impact (through 2030)
Augmentation — AI enhances process simulation, predictive maintenance, and optimization of complex chemical reactions, but physical scale-up and safety oversight remain human-centric.

Duties and responsibilities

  • Design and optimize unit operations — reactors, distillation columns, heat exchangers, absorption towers — using simulation software and mass/energy balance calculations
  • Develop and refine chemical process flow diagrams (PFDs) and piping and instrumentation diagrams (P&IDs) for new and modified processes
  • Investigate and resolve process deviations, yield losses, and quality failures through root cause analysis and design-of-experiment (DOE) methodology
  • Scale up processes from bench or pilot scale to full production, accounting for heat transfer, mixing, and reaction rate changes with scale
  • Perform process hazard analyses (PHAs) and HAZOP studies to identify and mitigate safety risks in chemical process design
  • Specify and size process equipment: pumps, compressors, vessels, heat exchangers, instrumentation, and control valves
  • Support capital project execution: write user requirement specifications, review vendor designs, and commission new process equipment
  • Develop and maintain process safety information (PSI) and operating procedures for PSM-covered facilities
  • Monitor process performance using statistical process control (SPC) and data historian tools to identify optimization opportunities
  • Ensure compliance with EPA, OSHA PSM (29 CFR 1910.119), and RMP regulations for highly hazardous chemical processes

Overview

Manufacturing chemical engineers are the people who figure out how to make chemistry work at scale. A chemist in a lab can synthesize a compound in a 500-milliliter flask with precise control over every variable. A chemical engineer's job is to make the same transformation happen in a 50,000-liter reactor, continuously, at a fraction of the unit cost, without generating an unacceptable hazard or waste stream.

In a manufacturing setting, the daily work divides across three areas. Process operations support involves troubleshooting production problems: why did yield drop this batch, what changed when the quality deviation appeared, how do we recover the batch currently at risk. This is often urgent and requires both analytical rigor and the willingness to operate in ambiguity with incomplete data.

Process improvement involves longer-cycle projects: identifying where energy efficiency, yield, or throughput can be improved, designing experiments to test hypotheses, and implementing changes through management of change procedures. In a refinery or chemical plant, a 1% yield improvement on a large-volume product can be worth millions annually, which gives these projects high internal visibility.

Capital project support involves new process design or major modifications: from early feasibility through detailed engineering, commissioning, and startup. Writing equipment specifications, reviewing vendor designs, and working with contractors are standard parts of large capital projects.

Across all of these, process safety is not a separate activity — it's embedded in how the work gets done. PSM facilities handle materials that can kill people if they escape containment. Chemical engineers who understand this at a bone-deep level — who ask the safety question before someone else has to — are the ones who earn trust in high-hazard environments.

Qualifications

Education:

  • Bachelor's in chemical engineering (BS ChE) — required at virtually all employers
  • Master's or PhD in chemical engineering, chemistry, or materials science — standard in R&D, polymer science, or pharmaceutical development roles
  • PE (Professional Engineer) license — EIT/FE exam first, then 4 years of progressive experience before PE exam

Certifications:

  • PE License (Professional Engineer) — required for some consulting and regulatory-facing roles
  • OSHA PSM awareness training — expected for engineers in PSM-covered facilities
  • HAZOP/PHA facilitator training — AIChE and SIS-TECH offer recognized programs
  • Aspen Plus / HYSYS certification — AspenTech offers certification programs; less formal but valued by employers
  • Six Sigma Green or Black Belt — common in high-volume chemical manufacturing improvement roles

Technical skills:

  • Process simulation: Aspen Plus, HYSYS, PRO/II
  • P&ID interpretation and markup using AutoCAD Plant 3D or SmartPlant
  • Statistical tools: Minitab, JMP for DOE and SPC analysis
  • Mass and energy balance calculations by hand and in Excel
  • Heat transfer, fluid mechanics, and reaction engineering fundamentals
  • Environmental reporting: EPA TRI, Subpart W emissions reporting, LDAR program compliance

Industry-specific knowledge (varies by sector):

  • Pharma: cGMP (21 CFR Parts 210/211), validation protocols, technology transfer
  • Refining: API standards, crude characterization, distillation design
  • Semiconductors: wet chemistry, photolithography chemistry, chemical mechanical planarization

Career outlook

Chemical engineering remains one of the highest-compensated engineering disciplines, consistently ranking near the top of salary surveys alongside petroleum and computer engineering. The BLS projects positive employment growth through the late 2020s, driven by pharmaceutical production, materials innovation, and clean energy chemistry.

The near-term demand picture is strong in several sectors. Pharmaceutical and biotech manufacturing is expanding, driven by GLP-1 drug demand and domestic manufacturing investment following COVID supply chain lessons. Semiconductor manufacturing — driven by CHIPS Act funding — requires substantial process chemistry expertise that manufacturing chemical engineers provide. Clean energy is creating new demand for engineers who can design electrolysis systems, battery chemistry processes, and carbon capture systems.

The traditional base — petrochemicals and refining — is stable at current energy prices but is not a growth sector in the long term as the energy transition progresses. Engineers in this sector who develop transferable process skills (reaction engineering, separation, scale-up) and don't specialize exclusively in petroleum chemistry will have the most options.

The career ladder for chemical engineers in manufacturing is clear and well-compensated. Entry-level engineers start in process engineering or technical service roles. With 5–10 years of experience, they move into senior process engineer, process safety manager, or project engineering roles, typically earning $100–130K. The senior career path leads to principal engineer, engineering manager, or plant technical director, with total compensation in the $140–200K range at major chemical and pharmaceutical companies.

For engineers who pursue PE licensure or move into consulting, the rate structure in process safety and environmental compliance work is particularly strong — experienced PSM/HAZOP consultants routinely bill $175–250/hour.

Sample cover letter

Dear Hiring Manager,

I'm applying for the Manufacturing Chemical Engineer position at [Company]. I'm a BS ChE with four years of process engineering experience at [Company], a specialty chemicals manufacturer where I've been the unit process engineer for our chlorination and distillation operations.

My day-to-day work involves two things: keeping the unit running at plan and making it run better. On the operational side, I manage process deviations, coordinate with the control room on setpoint adjustments, and lead root cause analyses when we have a quality or yield event. Over the past year I've reduced unscheduled unit outages by 30% by building a leading indicator dashboard in OSIsoft PI that flags process conditions historically associated with the fouling events that were causing most of our downtime.

On the improvement side, I led a DOE-based study of our distillation column to characterize the interaction between reflux ratio and feed composition variability. The output was a revised operating window that improved product purity by 1.2 percentage points without throughput loss — the equivalent of about 800,000 lb/yr of additional on-spec product. That result went through management of change, was implemented in the DCS setpoint limits, and is reflected in the updated operating procedures I wrote.

I'm also the PSI coordinator for our unit, which has sharpened my familiarity with the PSM regulatory framework — P&IDs, PFDs, equipment data sheets — and I've participated in three HAZOP sessions as a process expert.

I'm drawn to [Company]'s pharmaceutical API synthesis operations because of the regulatory rigor and the formulation-to-manufacturing interface I'd get to work at. I'd welcome the opportunity to discuss how my background fits.

[Your Name]

Frequently asked questions

What does a Manufacturing Chemical Engineer do?
Manufacturing Chemical Engineers design, optimize, and troubleshoot the chemical processes used to manufacture materials, chemicals, fuels, food, pharmaceuticals, and consumer products at industrial scale. They apply principles of thermodynamics, reaction kinetics, mass transfer, and fluid dynamics to processes that convert raw materials into products reliably, safely, and economically.
What are the main duties of a Manufacturing Chemical Engineer?
Core duties include: design and optimize unit operations — reactors, distillation columns, heat exchangers, absorption towers — using simulation software and mass/energy balance calculations; develop and refine chemical process flow diagrams (PFDs) and piping and instrumentation diagrams (P&IDs) for new and modified processes; and investigate and resolve process deviations, yield losses, and quality failures through root cause analysis and design-of-experiment (DOE) methodology.
Do Manufacturing Chemical Engineers need a Professional Engineer (PE) license?
PE licensure is required for engineers who sign off on designs affecting public safety — process safety reports submitted to regulators, some environmental permits, and public utility work. In industry, many chemical engineers work effectively without a PE. The license adds value for those moving into consulting, regulatory affairs, or senior technical roles where external credibility matters. The FE exam (Fundamentals of Engineering) is the first step and is worth taking immediately after graduation.
What process simulation software do Manufacturing Chemical Engineers use?
Aspen Plus and Aspen HYSYS (AspenTech) are the industry standards for steady-state and dynamic process simulation. PRO/II (SimSci) is common in refining. COMSOL Multiphysics handles more complex mass transfer and reaction modeling. For batch process simulation, DynoChem and SuperPro Designer are used in pharmaceutical development. Excel remains ubiquitous for mass balances, economic models, and data analysis.
What industries hire Manufacturing Chemical Engineers?
Petrochemicals and refining are the largest employers, but chemical engineers work across semiconductors (where process chemistry is critical), pharmaceuticals (synthesis, purification, formulation), food processing, materials science (polymers, composites, coatings), specialty chemicals, mining and minerals processing, and environmental consulting. The degree's breadth makes it one of the more transferable engineering credentials.
What is a HAZOP study and when is it required?
A Hazard and Operability Study (HAZOP) is a structured team review of a process design that systematically identifies potential deviations from design intent and their consequences. It's required under OSHA's Process Safety Management (PSM) standard for facilities handling highly hazardous chemicals above threshold quantities. Experienced chemical engineers lead or facilitate HAZOP studies; newer engineers participate to build process safety understanding.
How is AI affecting chemical engineering work?
Machine learning is being applied to reaction optimization, formulation development, and predictive quality in manufacturing. In pharma, AI-assisted molecule screening is changing the upstream R&D pipeline. In manufacturing operations, AI-driven process optimization is reducing the trial-and-error cycle for yield improvement. Chemical engineers who can formulate engineering problems in ways that machine learning can address — and who understand when the model's answer is physically plausible — will shape how the tools get deployed.

Related job descriptions

See all Manufacturing jobs →