Process Engineer II

roeslein· Engineering
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📍 St Louis, MO, USFULL TIME

About this role

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.

Frequently Asked Questions

Is the salary disclosed for the Process Engineer II position at roeslein?
The salary for this Process Engineer II role at roeslein is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Process Engineer II position at roeslein located?
This Process Engineer II role at roeslein is based in St Louis, MO, US. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Process Engineer II role at roeslein full-time or part-time?
This is listed as a FULL TIME position. It is posted as a Process Engineer II role in the Engineering department at roeslein.
Which team or department does the Process Engineer II at roeslein belong to?
This Process Engineer II position is part of the Engineering department at roeslein. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Process Engineer II position at roeslein?
Click the "Apply Now" button on this page. You will be redirected to roeslein's official application portal hosted on icims where you can submit your application directly.
When was the Process Engineer II job at roeslein posted?
This Process Engineer II position at roeslein was posted on Apr 15, 2026. Apply as soon as possible — early applications are often reviewed first.
Process Engineer II
roeslein
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