Internship Geothermal Engineer Jobs (NOW HIRING)

Hephae Energy Technology is seeking a skilled and motivated Mechanical Engineer to join our team and help us advance our directional drilling systems to operate at ultra-high temperatures.

The successful candidate will be responsible for establishing production readiness, commercialization, and sustaining engineering of Hephae’s mechanical products and analyzing, designing, developing, and testing mechanical systems and components for our drilling equipment.

The ideal candidate should have experience or coursework in heat transfer, mechanical systems, mechanical testing, and material science as well as exposure to a manufacturing environment.

Hephae Energy Technology is a next-generation geothermal technology company developing ultra-high temperature robotics, including drilling systems that enable the precise wellbore placement required by the industry. By overcoming the temperature and reliability limits of conventional drilling tools, Hephae is unlocking access to deeper and hotter rock to support the future of firm, sustainable energy.

Spring, Texas. Relocation is required and will be the responsibility of the successful candidate. Applicants must have valid U.S. work authorization; visa sponsorship is not available.

• Develop and implement test procedures and equipment for mechanical systems and components operating at high temperatures
• Analyze test data and develop reports to communicate findings to other team members and stakeholders
• Develop and maintain manufacturing work instructions, assembly travelers, inspection criteria, torque specifications, and controlled production documentation
• Design assembly fixtures, alignment jigs, inspection gauges, and mechanical test equipment that enable repeatable production without continuous design-engineering support
• Participate in supplier qualification, supplier audits, first-article inspections, and vendor corrective actions, particularly for precision machining, coatings, surface treatments, and high-temperature components
• Perform verification of material and component traceability, including material certifications, heat numbers, mill test reports, coating records, and inspection documentation
• Design and develop mechanical systems and components for directional drilling equipment
• Conduct research to identify materials and methods that can improve product performance in high-temperature environments
• Perform thermal and structural analysis using simulation software to ensure equipment can withstand high temperatures and pressures
• Responsible for defining and supporting incoming inspection, in-process inspection, final acceptance testing, and production quality gates
• Develop and execute environmental and mechanical qualification testing, such as thermal cycling, high-temperature testing, pressure testing, shock, vibration, and HASS/ESS activities
• Responsible for conducting failure analysis and forensic teardown of field-returned tools, documenting root cause, and recommended corrective actions
• Participate in a formal Engineering Change Order process, ensuring field lessons and design improvements are incorporated into units already in production
• Support production troubleshooting, nonconformance resolution, corrective and preventive actions, and continuous improvement initiatives
• Collaborate with Production, Quality, Procurement, suppliers, technicians, and external test laboratories to meet the planned fleet ramp from prototypes to commercial production
• Responsible for improving manufacturability, assembly time, product cost, reliability, repeatability, and production throughput
• This position requires the engineer to spend meaningful time in the production area, supplier facilities, test laboratories, and field-support activities rather than working solely in a design-office environment
• Collaborate with other engineers, designers, and technicians to ensure projects are completed on time and within budget
• Participate in the product development process from concept to launch
• Troubleshoot and resolve mechanical issues in existing products and develop improvements for reliability, performance, and cost to manufacture as part of an ongoing continuous improvement program
• Interface and troubleshoot problems with Production department to achieve efficient manufacture and commercialization of Hephae’s tools

• Bachelor’s degree in Mechanical Engineering or related field with 0–5 years of experience, including internships or early-career roles involving manufacturing, production, quality, or mechanical assembly.
• Familiarity with GD&T, tolerance stack-ups, root-cause analysis, FMEA, 8D/CAPA, first-article inspection, and basic statistical process control preferred.
• Knowledge of heat transfer, mechanical systems, mechanical testing, and material science
• Proficiency in CAD software, such as SolidWorks or AutoCAD with experience in mechanical testing, drawing interpretation, and tolerance analysis
• Experience with simulation software, such as ANSYS or COMSOL preferred but not required
• Excellent problem-solving and analytical skills
• Strong written and verbal communication skills
• Ability to work independently and in a team environment
• Experience with product development processes from concept to launch is a plus

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