Principal Combustion Engineer

About the role

For more than 40 years, Reworld has been a leader in sustainable waste solutions, providing our customers with innovative solutions that help them achieve carbon-negative outcomes. Our Vision Reworld is leading the charge to a carbon-negative future through revolutionary sustainable materials management solutions that reduce, reuse, recycle and reimagine waste for the benefit of society and the environment. Our Business Reworld partners with businesses by offering cutting-edge engineering and innovative solutions, to help customers reduce, reuse, recycle and recover value from waste streams and meet or exceed their sustainability goals. Our Value Reworld's differentiator comes from our ecosystem of technology, facilities and partnerships, trusted by the world's largest organizations to reimagine waste management for a smarter, more sustainable world. All that we're missing is you. Apply today! Position Summary Reporting to the Vice President, Plant Support, the Principal Combustion Engineer serves as the company's senior technical authority on Waste-to-Energy combustion performance, furnace operation, and boiler thermal behavior. This role provides expert-level technical support to operating facilities, with a focus on identifying true performance drivers , stabilizing combustion, improving throughput and availability, and supporting investigations related to environmental exceedances . The position requires strong technical judgment , systems-level thinking , and the ability to distinguish signal from noise . Success in this role depends as much on credibility, discretion, and influence as it does on combustion expertise. The Principal Combustion Engineer acts as a trusted conduit between plant operations, plant leadership, and corporate engineering.

Responsibilities

• Senior Technical Leadership - Combustion & Boiler Performance
• Serve as the subject-matter expert for combustion systems, furnace operation, and boiler performance across all Reworld Waste-to-Energy facilities.
• Evaluate operating data, trends, and transient events to identify underlying cause-and-effect relationships impacting performance, reliability, and emissions.
• Apply fundamental combustion principles, including air/fuel balance, residence time, and temperature, to guide troubleshooting and performance improvement efforts.
• Provide expert guidance on control strategy adjustments, operating targets, and system interactions affecting combustion stability and throughput .
• Performance Triage & Problem Selection
• Review operating and exceptions data to identify issues that merit deeper investigation versus those that are expected or non-actionable.
• Exercise sound technical judgment in prioritizing effort, focusing on issues where combustion engineering can materially improve outcomes .
• Avoid unnecessary intervention in well-performing facilities while proactively engaging where emerging risks or degradation are identified.
• Help plants and leadership understand what matters, why it matters, and what does not within the expected skillset.
• Environmental Exceedance & RCA Support
• Support root cause analyses related to environmental exceedances, abnormal emissions events, and combustion-related operating deviations.
• Analyze event timelines, operating data, and control system trends to determine causal mechanisms rather than symptoms.
• Partner with Environmental, Operations, and Maintenance teams to define corrective and preventive actions that are technically sound and operationally sustainable .
• Provide expert input on whether events warrant deeper investigation or represent known, understood failure modes.
• Cross-Functional Influence & Relationship Management
• Build trusted relationships with plant personnel by listening, demonstrating technical credibility , and valuing operational insight.
• Act as a conduit between facilities, plant leadership, and corporate engineering, ensuring critical information flows appropriately.
• Support alignment between facility operations and facility management when technical perspectives differ.
• Knowledge Stewardship & Capability Building
• Leverage historical operating data, prior analyses, and plant-specific documentation to inform recommendations and share relevant insights.
• Contribute to the development and dissemination of combustion-related best practices, guidance documents, and institutional knowledge.
• Coach and mentor other engineers and plant personnel on combustion fundamentals , performance drivers , and systems thinking .
• Reinforce consistent application of combustion basics across the fleet.

Requirements

• Education
• Bachelor's degree in Chemical Engineering, Mechanical Engineering, or a related engineering discipline. Candidates who do not have a 4-year degree may be considered with equivalent job experience.
• Travel Requirement
• Ability and willingness to travel up to 20% to support facility needs, investigations, performance improvement efforts, and stakeholder

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