Hire the Best Chemical Engineers

Clients rate our Chemical Engineers
Rating is 4.8 out of 5.
4.8/5
Based on 660 client reviews
VASUDEVAN V.

Chennai, India

$30/hr
5.0
53 jobs

• Over 40 years of Professional Experience in Conceptual, FEED, Detailed Process Engineering and Project Management. • Currently involved in providing process engineering support to CCUS, Green Ammonia, Green Hydrogen and Biobased chemical projects in USA and India. Also providing conceptual process design support for Hydrogen production from steam reforming of natural gas . • Rich and diverse professional experience in world class multinational environments covering Oil & Gas / downstream Hydrocarbon / Chemical projects in Singapore, Oman, Iran, Qatar, Malaysia and India, for reputed International Operating/Engineering /EPC firms like Dow Chemicals, Kellogg Brown and Root (KBR), J. Ray McDermott, Saipem, Kvaerner, Worley, and Electrowatt. • Versatile experience covering full range of engineering management and design roles, as Lead Project Engineer, Project manager, Engineering manager (heading PMC), Lead Process Engineer, Process Engineering manager, Business development manager and Engineering Coordinator (John Brown Iran JV). • Experienced as Head of Process department, in recruitment, training, mentoring and development of Process engineers and meeting corporate objectives of departmental performance. Licensing and technology development experience gained with world’s topmost petrochemical/chemicals company. • Lead Process Engineer experienced in managing a team of Process Engineers on large and complex Hydrocarbon Projects in Petrochemicals, Offshore and Onshore Oil and Gas sectors at Concept, FEED and Detailed Engineering Stages.

  • Process Design
  • HAZOP
  • Equipment Sizing
  • Project Management
Michail G.

Kallithea/ Katerini, Greece

$110/hr
4.4
331 jobs

Chemical Engineer, PhD #1 in successful projects on Upwork (among chemists and chemical engineers) #1 in earnings on Upwork (among chemical engineers and process engineers) Head Chemical Engineer at Hydrogen Dynamics Research / Computational Chemist/ Chemical Engineer at BIC World Chemical Engineer at TERSUS Group [past] Chemical / Process Engineer at Qaptis [past] Subject Matter Expert at ControlRooms AI [past] Chemical Engineering Specialist/ Lecturer at LondonTFE Chemical Engineer Specialist / Computational Chemist at MVS Pharma Chemical Engineer/ Process Engineer / Consultant at IndustriaSYS Chemical Engineer/ Owner at SinodosChemistry Providing the following services since 2003: - Investigation of physical and chemical processes - Computational Chemistry simulations for nano and micro level physical, chemical, electronic, optical properties evaluation and the description of physical and chemical processes - Computational Fluid Dynamics [CFD] simulations for product development, product optimization, process design, process optimization, process troubleshooting - Process Simulation to create mass balances, energy balances, process flow diagrams [PFDs], plant wide descriptions, setting up of whole industrial processes - Scientific literature reviews in areas of Chemistry, Chemical Engineering, Industrial Engineering, Material Science, Oil & Gas, Polymers, Solar Energy, Green Technology, Electrochemistry, etc - MatLab modelling for physical and chemical processes, Reaction simulation, and other complex systems - White papers - Technical papers - Opinion papers - Feasibility studies - Chemical Model building - Financial feasibility of physical, chemical and manufacturing processes Scientific Consultation since 2010: - Oil & Gas - Polymers - Smart materials - Composites - Disinfectants - Anti microbial agents - Ionic Liquids - Separation Processes - CBD/ THC purification - Clean energy - CO2 capture - H2 storage and H2 utilization - Zero emission power plants - Novel coatings - Separations & purifications approaches - Distillation, Adsorption, Absorption, Extraction - MatLab Modelling Scientific WEBINARS in the fields: - Reactor Engineering [design, operation, troubleshooting] - Thermodynamics Fundamentals - Separation Processes: Adsorption, Absorption, Distillation, Extraction - Electrochemistry and Electrolysis - Catalysis - Modeling and Simulation of Physical and Chemical processes - Introduction to Computational Chemistry & HyperChem - Introduction to Computational Fluid Dynamics & SimScale - Introduction to Process Simulation & DWSIM - The complete simulation WEBINAR for Chemical Engineering [Computational Chemistry, CFD, Process Simulation] - CO2 technology: Capture, utilization, zero emissions power plants, storage - H2 technology: Generation, storage, utilization - Disinfectants: Types, formulations, application types and advances - Organic Chemistry chapters - Polymer Technology - Oil & Gas fundamentals - MatLab for Engineers Editorial board member at International Journal of Computational and Theoretical Chemistry Scientific publications reviewer for Elsevier Journals

  • Chemical Engineering
  • Chemistry
  • MATLAB
  • Aspen Plus
  • Process Simulation
  • Purification
  • Computational Fluid Dynamics
  • Agriculture & Forestry
  • Occupational Health
  • Molecular Biology
  • Nanotechnology
  • Scientific Computation
  • Academic Writing
  • Industrial Design
Ahmed H.

Sohag, Egypt

$33/hr
5.0
49 jobs

Hi there! I’m Ahmed,⭐⭐⭐⭐⭐ a top-rated Plus freelancer, proven track record of success, a Process Engineer with over 10 years of hands-on experience helping clients in the Oil & Gas, Water Treatment, and Industrial Utilities sectors achieve safe, efficient, and optimized operations. What I Can Help You With? • Process & Hydraulic Analysis: Process Design, Process Improvement, Oil and Gas Expertise, Surge and transient studies, pump sizing, control valve optimization, and pressure profile assessments. • Process Simulation & Design: Aspen HYSYS, Aspen Plus, EPANET, AFT Fathom/Arrow/Impulse, WANDA, and HTRI modeling for design and optimization. • Engineering Documentation: FEED development, PFDs and P&IDs, design basis reports, process datasheets, and technical reviews. • System Optimization & Troubleshooting • Process Hazard Analysis (HAZID, HAZOP, SIL, LOPA, QRA, FERA, EERA, FMEA, FMECA, FTA, ETA) • Process Data Sheets development (Equipment Sizing) • Cause & Effect diagrams development • Quantity Take-off from detailed project drawings, mark up different items properly. • Construction estimation manpower, material and equipment using reliable platforms such as RSmeans. • Maintenance planner, Predictive, preventive, Reliability Centered and Proactive. • Project life cycle building. • Training & Mentorship: Customized in-class, on-site, and online programs for engineers and operators. My Technical Toolbox: Aspen HYSYS | Aspen Plus | AFT Fathom | AFT Arrow | AFT Impulse | EPANET | WANDA | Water9 | HTRI | Pro II | AutoCAD Why Clients Love Working With Me • Top-rated Plus freelancer, proven track record of success and long-term client relationships. • 10+ years of real project experience covering FEED, design, HAZOP/SIL/HAZID, FAT/SAT, and commissioning. • Known for clear communication, on-time delivery, and accurate engineering analysis. • Passionate about using technology to boost safety, efficiency, and sustainability in every project. I’m always happy to discuss your project needs and provide insight before we begin, feel free to reach out anytime!

  • Chemical Engineering
  • HAZOP
  • Aspen HYSYS
  • Training
  • Hydraulic Simulation
  • EPANET
  • Aspen Plus
  • AutoCAD Plant 3D
  • Water
  • Process Engineering
  • Piping & Instrumentation Diagram
  • Process Flow Diagram
  • Energy
  • Fathom Applications Fathom
Andres Alberto arrocha A.

Cuernavaca, Mexico

$85/hr
4.7
198 jobs

I'm a biochemical engineer who builds reactive HTML modelling calculators that tell food, supplement, cosmetic, and botanical founders what their next decision should actually be, instead of what a spreadsheet someone else built says it should be. Ten years as a free agent. 200+ projects shipped. $1.5M in direct contracts. ~$10M in documented client value across CPG, nootropics, frozen desserts, ingredient extraction, herbal and botanical formulation, and cosmetics. MSc in Biochemistry, six years in academia before that. That's how I know the difference between math that decides and math that impresses. Where my work tends to land: 🧊 Popsicles, frozen desserts, ice pops. Stabilizer system balance (xanthan, guar, LBG), sugar and syrup ratios, freezing-point depression, ice-crystal control, freezer-cabinet stability windows. Reactive formulators with every range hard-stopped to published literature. 🥤 Protein bars, protein beverages, protein isolates. Whey, casein, pea, soy, and hydrolysate selection. Sweetener and bitterness profiles, per-serving cost, label-claim feasibility, extraction yield, COGS per kilo, and breakeven curves across production scales. My protein-isolate model is used by clients across the agro-extraction industry to size processing lines before committing capital. 🌿 Botanicals and herbal products. Ingredient quality, MOQ math, supplier vetting, label compliance, formulation stability, extraction methodology. I also run a small herbal business myself, so I've felt every margin squeeze and ingredient-quote shock that clients bring to me. 💊 Supplements and nootropics. Claim feasibility, dose math, cost engineering, co-manufacturer scoping, channel-margin modeling. ✨ Cosmetics. Ingredient compatibility, parameter constraints, process simulation, scale-up math. 🛠️ What I actually deliver: A reactive browser-based calculator built around your real product, your real ingredient costs, your real production scale. Sliders for every variable that matters, with hard-stopped ranges grounded in published research. Plus the Excel back-end so your CFO can audit every formula. Plus a written diagnosis of what the numbers actually say. Plus implementation docs you can hand to your team. Typical turnaround: 5 business days for a tuned single-product engagement, 2 to 4 weeks for multi-product strategic models. Past custom engagements have run from $850 to $10,000, most landing in the $3,000 to $5,000 range depending on how many moving parts there are. 📊 Case study. David at Mora Cué Alimentos came to me with an equipment-selection question for a chia protein line. Three weeks later, with three product directions and three production scales modeled against real ingredient costs, channel margins, and capacity constraints, the answer was specific: protein concentrate at mid-scale, 41% gross margin. They built it. It works. 💬 What operators say: "Andres is very knowledgeable with great ideas and outstanding organizational skills." Cecilia Shepherd, CEO, Sound Science Nutrition "Andres was extremely helpful. I had a recipe emergency which he solved same day. I could go back to production with minimal disruption. Definitely will work again with him." Ismar Toromanovic, CEO, 3D Desserts "Andres is an outstanding chemist. I often cross-verify our models with his fundamental knowledge. I strongly recommend anyone looking for chemistry tutoring or overseeing complex calculations." Vishy Karri, CEO, Expert 365 "Congratulations on building this tool. It's really useful." David Olson, CEO, Mora Cué Alimentos ✅ A fit if you're a CPG, supplement, nootropic, cosmetic, or botanical founder at $1M+ in revenue or capital, making a real decision in the next 60 to 90 days. A co-man trial, an SKU launch, an ingredient swap, a scale-up. People tired of vibes-based pricing who want numbers they can defend in front of a board, a co-man, or a buyer. ⚠️ Probably not a fit if you're pre-revenue with a generic plan, shopping for the cheapest spreadsheet on the market, or looking for a formulator rather than a strategist. (I can refer you to good formulators if that's what you actually need.) Send me the decision you're sizing. If a model would help, I'll tell you. If it wouldn't, I'll tell you that too, in the first ten minutes.

  • Chemistry
  • Biochemistry
  • Molecular Biology
  • Nanotechnology
  • Scientific Literature Review
  • Research Papers
  • Data Visualization
  • Google Search
  • Academic Writing
  • Google Docs
Rogelio C.

Veracruz, Mexico

$50/hr
4.9
45 jobs

I have a background in chemistry and engineering (Chemistry, Biology, Biochemistry, Thermodynamics, fluid dynamics, electrochemistry) I have experience working on: ✔️ Food technology (formulation and development of products such as powder supplements, drinks, gummies) ✔️ Electrochemistry (Flow batteries, electroanalytical techniques, design of sensors, metal recovery) ✔️ Scientific writing

  • Chemical Engineering
  • Chemistry
  • Biology
  • Biotechnology
  • Biochemistry
  • Writing
  • Academic Writing
  • Technical Translation
  • Research Papers
  • Computational Fluid Dynamics
  • Content Writing
  • Materials Engineering
Rose Jane H.

Calamba City, Philippines

$5/hr
5.0
3 jobs

Registered Chemist and Registered Chemical Technician. MS Chemistry Candidate. Quality Assurance & Regulatory Compliance Specialist with experience in pharmaceutical QA/QC, cGMP, ISO 9001, FDA audits, SOP writing, CAPA, and product/raw material release. Trained in HPLC (Nexera, Waters), GC (FID, ECD, GCMS), AAS, and ISO 9001 Lead Auditing.

  • Chemistry
  • Virtual Assistance
  • Science Tutoring
  • Research Proposals
  • Tutoring
  • Scientific Literature Review
  • Research & Development
  • Chemical Synthesis
  • Organic Chemistry
  • Analytical Chemistry
  • Biochemistry

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At A Glance: Chemical Engineering

What is a chemical engineer?

A chemical engineer develops and designs chemical manufacturing processes, applying the principles of chemistry, biology, physics, and math in order to solve problems related to the production or use of chemicals, fuel, drugs, food, and other products. Upwork offers access to capable chemical engineers adept at working in a variety of environments to resolve a host of challenges.

How do you hire a chemical engineer?

You can source chemical engineering talent on Upwork by following these three steps:

  • Write a project description. You’ll want to determine your scope of work and the skills and requirements you are looking for in a chemical engineer.
  • Post it on Upwork. Once you’ve written a project description, post it to Upwork. Simply follow the prompts to help you input the information you collected to scope out your project.
  • Shortlist and interview chemical engineers. Once the proposals start coming in, create a shortlist of the professionals you want to interview. 

Of these three steps, your project description is where you will determine your scope of work and the specific type of chemical engineer you need to complete your project. 

How much does it cost to hire a chemical engineer?

Rates can vary due to many factors, including expertise and experience, location, and market conditions.

  • An experienced chemical engineer may command higher fees but also work faster, have more-specialized areas of expertise, and deliver higher-quality work.
  • A contractor who is still in the process of building a client base may price their chemical engineer services more competitively. 

Which one is right for you will depend on the specifics of your project. 

How do you write a chemical engineer job post?

Your job post is your chance to describe your project scope, budget, and talent needs. Although you don’t need a full job description as you would when hiring an employee, aim to provide enough detail for a contractor to know if they’re the right fit for the project.

Job post title

Create a simple title that describes exactly what you’re looking for. The idea is to target the keywords that your ideal candidate is likely to type into a job search bar to find your project. Here are some sample chemical engineer job post titles:

  • Need systems engineer to oversee chemical operation
  • Looking for chemical engineer/chemist to assist in fragrance formulation for cosmetics company
  • Need help developing new polymer for tennis racket line

Project description

An effective chemical engineer job post should include: 

  • Scope of work: From formulating fragrances to overseeing an entire chemical operation, list all the deliverables you’ll need. 
  • Project length: Your job post should indicate whether this is a smaller or larger project. 
  • Background: If you prefer experience with certain industries, products, or environments, mention this here. 
  • Budget: Set a budget and note your preference for hourly rates vs. fixed-price contracts.

Chemical engineer job responsibilities

Here are some examples of chemical engineer job responsibilities:

  • Manage ordering raw materials, chemicals, and supplies for applicable lab work areas
  • Collect, analyze, interpret, and report technical data related to product development
  • Oversee the set up and use of equipment required to prepare and evaluate synthetic minerals

Chemical engineer job requirements and qualifications

Be sure to include any requirements and qualifications you’re looking for in a chemical engineer. Here are some examples:

  • Minimum five years experience with heterogeneous chemical reaction 
  • Experience with relevant laboratory instrumentation
  • Maintain clean, safe, and orderly work areas in compliance with industry standards