Process Engineer IV

Overview

Roeslein Renewables
, a division of Roeslein & Associates
, develops and operates Renewable Natural Gas (RNG) projects across the United States. Headquartered in St. Louis, Missouri, the company partners with landowners, farmers, and communities to reduce on-farm emissions, restore native prairies, and deliver long-term value through regenerative energy solutions. Our team captures biogas from agricultural waste and upgrades it into RNG for pipeline injection. With more than 30 RNG projects completed across multiple states, the company is recognized for its commitment to environmental stewardship and innovation.

We value integrity, professionalism, and transparency—and we never stop asking, “What more can we do?”

The Process Engineer IV will be responsible for managing new project development, optimizing existing operating assets, and leading other process engineers. Process development will span many sectors including Oil & Gas, Refineries, Pharma, and Alternative Energy. Work will include development of Process Flow Diagrams (PFDs), Material Balances, Process & Instrumentation Diagrams (P&IDs), process simulations, equipment datasheets, and calculations to support projects.

This role will also drive improvements in work processes, lead operations support, monitor environmental impact, develop dashboards and training tools, and identify and implement process optimization projects.

Engineering – provide process support for new projects, including:

• Develop process simulations and new models for complex projects
• Develop material and energy balances for complex projects
• Lead development of process flow diagrams (PFDs) and process & instrumentation diagrams (P&IDs)
• Manage process requirements for equipment selection
• Act as subject matter expert for process engineering in Hazard and Operability Studies (HAZOPs)
• Manage project permitting with clients
• Coordinate and lead shop inspection, field commissioning, and start-up of projects
• Manage technology selection or develop new technology as needed
• Coordinate proposal development for new projects
• Lead improvements in work processes
• Develop subject matter expertise in needed key areas
• Participate in internal and external project meetings

Operations – support existing operating units, including:

• Update P&IDs as required
• Manage Management of Change (MOC) protocols
• Optimize existing units to improve performance and reduce energy consumption
• Manage implementation of improvement projects at existing facilities
• Support environmental services reporting and develop tools for new markets
• Partner with Operations to lead troubleshooting and determine root causes
• Mentor and lead other process engineering team members

Other Duties and Responsibilities

• Conduct activities in a safe and healthy manner and work in accordance with established safety and company requirements
• Promote a positive working environment in order to achieve the organization’s 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

Work is performed in an office and uncontrolled atmosphere. Exposure to harsh conditions is possible for short periods of time—such as: dust, fumes, chemicals, hazardous materials, noise, and varying weather and temperatures. All employees are required to follow safety standards and wear all personal protective equipment in designated areas.

While performing the duties of this position, the employee will regularly be required to walk, stand, use hands and fingers, grip, handle or feel; reach with hands and arms; climb or balance; stoop, kneel, crouch or crawl; talk and hear; and work in a consistent state of alertness and in a safe manner. Ability to lift and carry 25 lbs. on a regular basis is required.

Required:

• Excellent communication skills, both oral and written
• Strong analytical and problem-solving skills
• Process simulation development skills
• Process knowledge of PFDs and P&IDs
• Experience leading project development
• Computer skills…