Senior Chemical Process Engineer

About Hexegen

Hexegen is a Texas-based advanced materials company and a subsidiary of Nabors Industries. We are commercializing the Hexite™ platform — a proprietary process for producing high-purity, graphene-class nanomaterials at scale.

For twenty years, graphene and graphene-class materials have been chemistry's most over-promised category. The properties are extraordinary — strength, conductivity, surface area no other material approaches — but the field has stalled on a recurring set of problems: processes that don't scale, products that aren't pure, feedstocks that aren't economic, and chemistries you can't tune to a specific application.

Hexite™ solves all four. The reaction is scalable. The product is high-purity. The inputs are common and inexpensive. And the process is controllable enough that we can engineer the molecule itself for the application at hand.

That tunability is what unlocks the full breadth of the market. Hexite™ materials target thermoplastics, construction, energy storage, automotive, aviation, defense, and medical applications, with hydrogen technologies on the roadmap.

The Opportunity

Hexegen's pilot facility manufactures high-quality Hexite™ at scale today. The chemistry works, and much of the production system that will follow has already been designed. The next chapter is engineering: fine-tuning that system, completing the work around it, and bringing it to commercial readiness so that Hexegen can supply Hexite™ to global customers across every market that wants it.

As a Senior Chemical Process Engineer, you will play a critical role in advancing Hexegen's proprietary Hexite™ technology from pilot-scale production to commercial readiness. You will lead the completion, integration, and optimization of chemical processing systems, applying hands-on engineering expertise to improve production performance, ensure process safety, and establish scalable manufacturing capabilities.

With a proven pilot process and much of the production system already designed, this opportunity offers the ability to directly influence how Hexegen transitions to commercial production. Your work will shape the reliability, efficiency, and product consistency of a technology positioned to serve multiple global markets, with opportunities to expand your technical leadership as the company grows.

Process Engineering & System Integration

• Lead the completion of process engineering designs, resolving outstanding technical requirements and advancing existing systems toward production readiness.
• Define process configurations, equipment specifications, and supporting system requirements to ensure effective integration of reactor systems and associated unit operations.
• Collaborate with internal teams and external engineering partners to translate process designs into executable manufacturing solutions.

Process Optimization & Continuous Improvement

• Evaluate and optimize pilot-scale operations to improve yield, throughput, process efficiency, and product consistency.
• Identify process limitations, troubleshoot technical challenges, and implement practical engineering improvements.
• Apply process data, engineering analysis, and continuous improvement methodologies to support reliable and repeatable production.

Process Scale-Up & Commercialization

• Translate pilot-scale operating performance into commercial-scale process and equipment requirements.
• Develop and validate mass and energy balances, equipment sizing, and process design parameters.
• Apply engineering judgment to maintain critical process characteristics, product purity, and performance as production capacity increases.

Process Safety, Quality & Controls

• Lead or support Process Hazard Analyses (PHA), HAZOP studies, relief system design, and process safety documentation.
• Develop process safety information and evaluate safety requirements for new or modified equipment.
• Establish process control and in-line quality strategies to maintain product purity and batch-to-batch consistency.

Project Execution & Cross-Functional Collaboration

• Partner with the Plant Manager, internal technical teams, vendors, fabricators, and engineering partners to advance process engineering initiatives.
• Provide technical support throughout equipment specification, procurement, commissioning, and start-up.
• Communicate engineering requirements, technical risks, and recommended solutions to stakeholders.
• Contribute to the development of engineering capabilities and mentor junior process engineers as the organization expands.

Required

• 7–12 years of process engineering experience in chemicals, advanced materials, specialty chemicals, or advanced manufacturing — with demonstrated hands-on experience fine-tuning a complex production system and engineering it to commercial readiness. That track record matters more to us than any other credential.

• Bachelor's degree in Chemical Engineering required. An advanced degree is welcome but not required — we weight production-floor experience over academic credentials.

• Hands-on experience with reactor systems and the surrounding unit operations — completing engineering work, specifying equipment, integrating systems, and turning a partial or pilot-scale design into a running production line.

• Strong working knowledge of process safety: HAZOP/PHA participation or leadership, relief design, and OSHA PSM where applicable.

• Fluency with process simulation tools (Aspen Plus, ChemCAD, or equivalent) and P&ID development.

• Experience with specialty materials, nanomaterials, carbon materials, CVD, or fine powders is a significant plus.

• A bias toward action, pragmatic problem-solving, and the judgment to know when to engineer for elegance and when to engineer for getting it built.

• Excellent written and verbal communication; fluent in English.

Preferred

• Prior experience in a start-up or scale-up environment where the equipment, the process, and the team are being built in parallel.

• Lean / Six Sigma exposure — useful but not required.

Location & Working Conditions

On-site role at Hexegen's facility, 13823 Humble Road, Tomball, TX 77375.

The role involves standard plant working conditions, including extended periods of walking and standing, occasional bending or climbing, and lifting up to 50 lbs. Some domestic travel is required for visits to vendors, fabricators, and partner facilities.

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