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Associate Process Engineer Jobs in St Louis, MO (NOW HIRING)

Process engineer

Saint Louis, MO · On-site

$88K - $103K/yr

Bachelor's or associate's degree in mechanical/plastics engineering or related field. * Reheat blow process and automation experience * Experience with the following manufacturers of machinery: Aoki ...

Process engineer

Saint Louis, MO · On-site

$88K - $103K/yr

Bachelor's or associate's degree in mechanical/plastics engineering or related field. * Reheat blow process and automation experience * Experience with the following manufacturers of machinery: Aoki ...

Process engineer

Saint Louis, MO · On-site

$42.31 - $49.52/hr

Bachelor's or associate's degree in mechanical/plastics engineering or related field. * Reheat blow process and automation experience * Experience with the following manufacturers of machinery: Aoki ...

Senior Process Engineer

Saint Louis, MO · On-site

$97K - $125K/yr

Overview Roeslein & Associates is a global leader in engineering, manufacturing, and construction ... The Senior Process Engineer will lead the process engineering effort on EPFC (engineer, procure ...

Bachelor's or associate's degree in mechanical/plastics engineering or related field. * Reheat blow process and automation experience * Experience with the following manufacturers of machinery: Aoki ...

Bachelor's or associate's degree in mechanical/plastics engineering or related field. * Reheat blow process and automation experience * Experience with the following manufacturers of machinery: Aoki ...

Works closely with Controls engineers for design of new or improved control process. Interacts with ... Ability to deal directly with associates at all levels within the organization to build consensus ...

Works closely with Controls engineers for design of new or improved control process. Interacts with ... Ability to deal directly with associates at all levels within the organization to build consensus ...

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Showing results 1-20

Associate Process Engineer information

See St Louis, MO salary details

$40.3K

$80.3K

$128.3K

How much do associate process engineer jobs pay per year?

As of Jul 1, 2026, the average yearly pay for associate process engineer in St. Louis, MO is $80,341.00, according to ZipRecruiter salary data. Most workers in this role earn between $63,700.00 and $92,400.00 per year, depending on experience, location, and employer.

What engineer makes $500,000 a year?

While most associate process engineers do not earn this level of salary, senior or specialized engineers in high-demand industries such as oil and gas, pharmaceuticals, or aerospace can reach or exceed $500,000 annually with bonuses and stock options. Achieving this salary typically requires extensive experience, advanced certifications, and leadership roles within the organization.

What are the key skills and qualifications needed to thrive as an Associate Process Engineer, and why are they important?

To thrive as an Associate Process Engineer, you need a solid background in chemical or mechanical engineering, problem-solving abilities, and a relevant bachelor's degree. Familiarity with process simulation software (like Aspen Plus or HYSYS), data analysis tools, and knowledge of industry standards is typically required. Strong analytical thinking, attention to detail, and effective communication skills help you collaborate with cross-functional teams and troubleshoot process issues. These skills ensure efficient process optimization, safety, and continuous improvement in manufacturing or production environments.

What does an associate process engineer do?

An associate process engineer supports the development, implementation, and optimization of manufacturing processes to improve efficiency and quality. They analyze data, troubleshoot issues, and collaborate with teams to ensure processes meet safety and performance standards, often using tools like process simulation software and requiring knowledge of engineering principles. This role typically involves monitoring production, documenting procedures, and assisting in process improvements under supervision.

What engineers make $300,000 a year?

Senior engineers in fields such as petroleum, aerospace, and software engineering can earn $300,000 or more annually, especially with extensive experience, advanced skills, and leadership roles. High compensation often involves working in specialized industries, managing large projects, or holding executive-level responsibilities.

How does an Associate Process Engineer typically collaborate with other departments during a project?

As an Associate Process Engineer, you'll work closely with cross-functional teams such as production, quality assurance, maintenance, and safety. Your role often involves gathering input from operators, coordinating with quality teams to resolve issues, and collaborating with senior engineers on process improvements. Regular communication and teamwork are essential, as you'll be expected to provide technical support, participate in meetings, and help implement solutions that align with overall operational goals. This collaborative environment not only enhances your technical skills but also helps you build strong professional relationships across the organization.

What is the difference between Associate Process Engineer vs Process Engineer?

AspectAssociate Process EngineerProcess Engineer
Required CredentialsBachelor's degree in engineering or related field; some certifications preferredBachelor's degree in engineering; often more experience or certifications required
Work EnvironmentEntry-level, supporting process development and optimization in manufacturing or chemical plantsMore independent roles, overseeing process improvements and troubleshooting
Employer & Industry UsageCommon in manufacturing, chemical, and pharmaceutical industriesUsed across similar industries, often with more responsibility

The main difference between an Associate Process Engineer and a Process Engineer lies in experience and responsibility. The Associate role is typically entry-level, focusing on supporting process tasks, while the Process Engineer has more independence and oversees process improvements. Both roles require similar educational backgrounds, but the Process Engineer usually has more experience or certifications. Understanding these distinctions can help job seekers identify the right position for their career stage and goals.

What engineers make $200,000 a year?

Senior engineers in fields such as petroleum, software, and aerospace engineering often earn $200,000 or more annually, especially with extensive experience, advanced skills, and relevant certifications. These roles typically require specialized knowledge, leadership responsibilities, and sometimes working in high-cost-of-living areas or industries with high demand.
What are the most commonly searched types of Process Engineer jobs in St. Louis, MO? The most popular types of Process Engineer jobs in St. Louis, MO are:
What are popular job titles related to Associate Process Engineer jobs in St. Louis, MO? For Associate Process Engineer jobs in St. Louis, MO, the most frequently searched job titles are:
What job categories do people searching Associate Process Engineer jobs in St. Louis, MO look for? The top searched job categories for Associate Process Engineer jobs in St. Louis, MO are:
What cities near St. Louis, MO are hiring for Associate Process Engineer jobs? Cities near St. Louis, MO with the most Associate Process Engineer job openings:
Process Engineer II

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 6 days ago


Job description

Overview

Roeslein & Associates is a global leader in engineering, manufacturing, and construction services, specializing in modular, prefabricated solutions for the energy, beverage, and industrial sectors. With a focus on safety, innovation, and sustainability, Roeslein delivers turnkey project execution from concept to commissioning. Our team is driven by a commitment to quality and client success, operating across North America, South America, Europe, and Asia. Learn more at Roeslein & Associates - Global EPC Services & Solutions.

POSITION SUMMARY:The Process Engineer II will execute process engineering work on EPFC (Engineer, Procure, Fabricate, Construct) projects under the leadership of the Process Engineering Department. Work will span a variety of industries, including Renewable Energy, Traditional Energy, Consumer Products, and others.

Responsibilities

ESSENTIAL DUTIES AND RESPONSIBILITIES:

Provide process support for new projects, including:

  • Develop process simulations
  • Complete material and energy balances
  • Develop process flow diagrams (PFDs) and process & instrumentation diagrams (P&IDs)
  • Complete process requirements for equipment selection
  • Participate in Hazard and Operability Studies (HAZOPs) - executed by others, managed by Process Engineer
  • Coordinate project permitting with clients
  • Support shop inspections, field commissioning, and project startup
  • Identify and evaluate technology vendors as needed
  • Support proposal development for new projects
  • Participate in internal and external project meetings
  • Support the development of interdepartmental documents, standards, and protocols

OTHER DUTIES AND RESPONSIBILITIES:

  • Conduct all activities in a safe and healthy manner in accordance with company requirements
  • Promote a positive working environment to achieve organizational goals
  • Travel domestically and internationally, ranging from 10-20% per year, with potential for increased travel during project start-up periods.
  • Perform other duties as assigned
Qualifications

SKILL / KNOWLEDGE / ABILITY / EDUCATION / EXPERIENCE:

Required:

  • Excellent oral and written communication skills
  • Strong analytical and problem-solving skills
  • Process simulation development experience
  • Experience with PFDs and P&IDs 
  • Proficiency with Microsoft Windows-based programs
  • Valid driver's license and acceptable motor vehicle record
  • Must be at least 21 years of age

Preferred:

  • Bachelor's degree in Chemical Engineering from an accredited university
  • 2-6 years of process engineering experience
  • EIT registration or desire to obtain Professional Certification

Keys to Success:

  • Effective time management skills across multiple projects, personal conduct, and change management abilities
  • Ability to interact effectively with co-workers, clients, vendors, and other business contacts
  • Compliance with Roeslein & Associates' core values for safe, efficient operations

WORK ENVIRONMENT:Work is performed in an office and uncontrolled atmosphere. Short-term exposure to dust, fumes, chemicals, hazardous materials, noise, and varying weather and temperatures is possible. All employees are required to follow safety standards and wear personal protective equipment in designated areas.

PHYSICAL DEMANDS:Employee must be able to walk, stand, use hands/fingers, grip, handle or feel, reach with hands and arms, climb, balance, stoop, kneel, crouch, crawl, talk, and hear. Ability to lift and carry 25 lbs. regularly is required.

BENEFITS & ADDITIONAL INFORMATION:At Roeslein, we invest in our team members' success and well-being. Full-time employees are eligible for competitive wages, bonus program, paid time off, personal and recovery days, travel bonuses, and paid holidays. Our retirement benefits include a 401(k) with company match and an ESOP (Employee Stock Ownership Program). We also offer medical, dental, and vision coverage, short and long-term disability insurance, life and travel insurance, and paid parental leave. Additionally, we support your growth with tuition reimbursement and continuing education opportunities to help you achieve your personal and professional goals.

Roeslein & Associates is an Equal Opportunity Employer.

The job description may not necessarily contain all of the actual or essential duties of this position. All job offers are contingent upon passing a drug screen and criminal background check.

Employment Type: FULL_TIME