GA Drilling
Tewkesbury, Gloucestershire
GA Drilling is developing next generation drilling technologies to unlock geothermal energy anywhere on Earth. Our mission is to make geothermal a globally scalable, baseload source of clean power by enabling access to hard, hot rock at depths and temperatures that conventional drilling cannot reach economically. Our work demands mastery across all facets of engineering-electronics, hydraulics, mechanics, systems, and control-and project management to create products that can survive and perform in harsh, high-temperature, high-load downhole conditions. Our technologies include smart downhole anchoring and drive systems that control the drilling process at the bit, plasma-based rock-destruction systems that fracture rock ahead of the drill bit, and innovative reeled drill strings that redefine how hard-rock wells are constructed. These innovations-whether deployed individually or integrated into a groundbreaking autonomous reeled drilling system-enable hard-rock wells to be drilled further, faster, and safer than conventional technologies. With engineering teams in the USA, Brazil, the UK, and across Europe, and strong collaboration with leading operators, GA Drilling is progressing rapidly toward commercial deployment of these technologies. We are looking for a highly specialized Simulation and Controls Engineer to drive the design, simulation, and control of the actuation systems integral to our downhole tools.? You will be based at our UK office (Tewkesbury). You will own Dynamic Modeling and Simulation Develop high-fidelity, multi-domain (hydraulic, mechanical, control) dynamic models of the actuation system using tools like Simscape and MATLAB/Simulink. Perform dynamic simulations to predict drilling response, including steerability, torque and drag influence, and mitigation of stick-slip oscillations. Control System Development & Implementation Design, tune, and validate robust closed-loop control algorithms (e.g., adaptive PID, state-space, or model predictive control) for precise force control. Collaborate with firmware engineers on the implementation, optimization, and real-time testing of control algorithms on embedded processors. Qualification, Testing, & Field Support Define and execute rigorous component and system-level validation plans, including Hardware-in-the-Loop (HIL) simulation and extreme environmental testing (e.g., flow loop, hot box). Perform root cause analysis (RCA) on field failures related to hydraulics, control stability, or actuation performance, driving effective and timely design modifications. Develop and maintain engineering documentation, including design reports, FMEAs, and qualification procedures. ?What we expect from you: Education: Bachelor's or Master's degree in Mechanical, Electrical, Mechatronics Engineering, or a related field. Experience: 7+ years of professional experience in control systems, dynamic modeling, and hydraulic design, with a minimum of 3 years directly related to Downhole Tools (RSS, MWD, or similar). Expertise in MATLAB/Simulink for modeling and control design. Deep understanding of electro-hydraulic servo systems and fluid power principles. Proven ability to design for extreme environments (HPHT, shock, and vibration). Familiarity with downhole sealing technology and fluid compensation systems. Experience with advanced control techniques (e.g., optimal control, non-linear control). ?What we offer: Opportunity to develop unique and innovative technological solutions which have the potential to change the world. The satisfaction of solving challenges associated with making ultra-deep geothermal energy a commercial reality. Be part of an experienced, global and highly motivated team.Collaborate with the world's top industry players. Competitive industry compensation & benefits
GA Drilling is developing next generation drilling technologies to unlock geothermal energy anywhere on Earth. Our mission is to make geothermal a globally scalable, baseload source of clean power by enabling access to hard, hot rock at depths and temperatures that conventional drilling cannot reach economically. Our work demands mastery across all facets of engineering-electronics, hydraulics, mechanics, systems, and control-and project management to create products that can survive and perform in harsh, high-temperature, high-load downhole conditions. Our technologies include smart downhole anchoring and drive systems that control the drilling process at the bit, plasma-based rock-destruction systems that fracture rock ahead of the drill bit, and innovative reeled drill strings that redefine how hard-rock wells are constructed. These innovations-whether deployed individually or integrated into a groundbreaking autonomous reeled drilling system-enable hard-rock wells to be drilled further, faster, and safer than conventional technologies. With engineering teams in the USA, Brazil, the UK, and across Europe, and strong collaboration with leading operators, GA Drilling is progressing rapidly toward commercial deployment of these technologies. We are looking for a highly specialized Simulation and Controls Engineer to drive the design, simulation, and control of the actuation systems integral to our downhole tools.? You will be based at our UK office (Tewkesbury). You will own Dynamic Modeling and Simulation Develop high-fidelity, multi-domain (hydraulic, mechanical, control) dynamic models of the actuation system using tools like Simscape and MATLAB/Simulink. Perform dynamic simulations to predict drilling response, including steerability, torque and drag influence, and mitigation of stick-slip oscillations. Control System Development & Implementation Design, tune, and validate robust closed-loop control algorithms (e.g., adaptive PID, state-space, or model predictive control) for precise force control. Collaborate with firmware engineers on the implementation, optimization, and real-time testing of control algorithms on embedded processors. Qualification, Testing, & Field Support Define and execute rigorous component and system-level validation plans, including Hardware-in-the-Loop (HIL) simulation and extreme environmental testing (e.g., flow loop, hot box). Perform root cause analysis (RCA) on field failures related to hydraulics, control stability, or actuation performance, driving effective and timely design modifications. Develop and maintain engineering documentation, including design reports, FMEAs, and qualification procedures. ?What we expect from you: Education: Bachelor's or Master's degree in Mechanical, Electrical, Mechatronics Engineering, or a related field. Experience: 7+ years of professional experience in control systems, dynamic modeling, and hydraulic design, with a minimum of 3 years directly related to Downhole Tools (RSS, MWD, or similar). Expertise in MATLAB/Simulink for modeling and control design. Deep understanding of electro-hydraulic servo systems and fluid power principles. Proven ability to design for extreme environments (HPHT, shock, and vibration). Familiarity with downhole sealing technology and fluid compensation systems. Experience with advanced control techniques (e.g., optimal control, non-linear control). ?What we offer: Opportunity to develop unique and innovative technological solutions which have the potential to change the world. The satisfaction of solving challenges associated with making ultra-deep geothermal energy a commercial reality. Be part of an experienced, global and highly motivated team.Collaborate with the world's top industry players. Competitive industry compensation & benefits
GA Drilling
Tewkesbury, Gloucestershire
GA Drilling is developing next-generation drilling technologies to unlock geothermal energy at depths and in conditions that conventional drilling cannot reach economically. Our mission is to make geothermal a scalable, baseload source of clean power by enabling reliable, efficient drilling in hard, hot rock. With engineering teams in the USA, Brazil, the UK, and across Europe, we are progressing rapidly toward commercial deployment of our technologies. We are seeking a proactive mechanical technician to perform mechanical assembly, testing, and maintenance for downhole drilling systems. The ideal candidate will be equally comfortable working with established processes and procedures, or with helping to develop and refine new ones. You will be based at our UK Tewkesbury Product Center. The opportunity for you You will be a core member of the operations team at our UK Product Centre, working closely with Engineering, Manufacturing, Supply Chain, and Quality & Compliance. Your work will ensure that drilling tools are produced, deployed, and maintained. You will have the opportunity to positively impact technology and processes as we move from prototype builds to commercial operations.? You will own Safety and Compliance Adhere to all health, safety, and environmental (HSE) regulations and quality procedures to ensure safe work practices. Support a positive and proactive HSE culture. Help maintain a safe, organized, and tidy workshop environment (5S, housekeeping, waste segregation). Assembly and Maintenance Assemble, disassemble, inspect, and perform maintenance on drilling tools and associated equipment according to technical specifications and procedures. Read and interpret technical drawings, schematics, blueprints, and engineering instructions to facilitate assembly and repair processes. Conduct functional tests, performance evaluations, and calibrations on equipment to ensure compliance with quality standards and specifications. Maintain accurate and detailed service records, calibration logs, and repair documentation. Generate reports on work performed and equipment status. Assist with managing the inventory of components, parts, and supplies. Troubleshooting and Repair Diagnose and repair equipment failures down to component level. Assist with failure reporting. Work with Engineering, Manufacturing and Quality & Compliance to escalate / solve technical or quality issues, and support investigations. Continuous Improvement and Engineering Support Assist in the development and refinement of manufacturing, testing, and maintenance procedures and equipment. Provide support to engineering teams for new designs and tests. Provide feedback to engineering on design improvement opportunities. Travel to and assist at field locations if required. Collaboration Engage with other technicians, engineers, field representatives, and functions to resolve issues, support failure analysis, and ensure seamless equipment deployment. ?What we expect from you: Experience & technical skills Experience with the assembly, maintenance, and testing of complex mechanical and electromechanical systems. Experience with drilling tool assembly or maintenance would be advantageous. Experience with equipment troubleshooting, and report generation. Overhead crane certification / training. Forklift certification. Break Out Machine familiarity and training would be advantageous. Ability to use a manual lathe / mill would be advantageous. Good computer literacy e.g. Microsoft Office, Maintenance Management Systems (CMMS). Ability to read, understand, and interpret technical manuals, schematics, and diagrams. Qualifications: HND / BTEC or equivalent relevant experience. Working style & collaboration High attention to detail, accuracy, and documentation discipline. Structured and reliable, able to follow defined procedures while highlighting gaps or issues when needed. Comfortable working with established processes and procedures, or with helping to develop and refine new ones Strong problem-solving, analytical, and critical thinking skills. Excellent communication skills, both written and verbal, for effective collaboration and reporting. Demonstrated ability to work independently or as part of a team Ability to provide and receive constructive feedback, contributing to improved product performance and reliability. What we offer: Opportunity to contribute directly to making ultra-deep geothermal energy a commercial reality. Chance to help establish and shape a new UK Product Centre from its early stages. Work with an experienced, international team of engineers and operations professionals. Competitive compensation and benefits in line with industry and local market.
GA Drilling is developing next-generation drilling technologies to unlock geothermal energy at depths and in conditions that conventional drilling cannot reach economically. Our mission is to make geothermal a scalable, baseload source of clean power by enabling reliable, efficient drilling in hard, hot rock. With engineering teams in the USA, Brazil, the UK, and across Europe, we are progressing rapidly toward commercial deployment of our technologies. We are seeking a proactive mechanical technician to perform mechanical assembly, testing, and maintenance for downhole drilling systems. The ideal candidate will be equally comfortable working with established processes and procedures, or with helping to develop and refine new ones. You will be based at our UK Tewkesbury Product Center. The opportunity for you You will be a core member of the operations team at our UK Product Centre, working closely with Engineering, Manufacturing, Supply Chain, and Quality & Compliance. Your work will ensure that drilling tools are produced, deployed, and maintained. You will have the opportunity to positively impact technology and processes as we move from prototype builds to commercial operations.? You will own Safety and Compliance Adhere to all health, safety, and environmental (HSE) regulations and quality procedures to ensure safe work practices. Support a positive and proactive HSE culture. Help maintain a safe, organized, and tidy workshop environment (5S, housekeeping, waste segregation). Assembly and Maintenance Assemble, disassemble, inspect, and perform maintenance on drilling tools and associated equipment according to technical specifications and procedures. Read and interpret technical drawings, schematics, blueprints, and engineering instructions to facilitate assembly and repair processes. Conduct functional tests, performance evaluations, and calibrations on equipment to ensure compliance with quality standards and specifications. Maintain accurate and detailed service records, calibration logs, and repair documentation. Generate reports on work performed and equipment status. Assist with managing the inventory of components, parts, and supplies. Troubleshooting and Repair Diagnose and repair equipment failures down to component level. Assist with failure reporting. Work with Engineering, Manufacturing and Quality & Compliance to escalate / solve technical or quality issues, and support investigations. Continuous Improvement and Engineering Support Assist in the development and refinement of manufacturing, testing, and maintenance procedures and equipment. Provide support to engineering teams for new designs and tests. Provide feedback to engineering on design improvement opportunities. Travel to and assist at field locations if required. Collaboration Engage with other technicians, engineers, field representatives, and functions to resolve issues, support failure analysis, and ensure seamless equipment deployment. ?What we expect from you: Experience & technical skills Experience with the assembly, maintenance, and testing of complex mechanical and electromechanical systems. Experience with drilling tool assembly or maintenance would be advantageous. Experience with equipment troubleshooting, and report generation. Overhead crane certification / training. Forklift certification. Break Out Machine familiarity and training would be advantageous. Ability to use a manual lathe / mill would be advantageous. Good computer literacy e.g. Microsoft Office, Maintenance Management Systems (CMMS). Ability to read, understand, and interpret technical manuals, schematics, and diagrams. Qualifications: HND / BTEC or equivalent relevant experience. Working style & collaboration High attention to detail, accuracy, and documentation discipline. Structured and reliable, able to follow defined procedures while highlighting gaps or issues when needed. Comfortable working with established processes and procedures, or with helping to develop and refine new ones Strong problem-solving, analytical, and critical thinking skills. Excellent communication skills, both written and verbal, for effective collaboration and reporting. Demonstrated ability to work independently or as part of a team Ability to provide and receive constructive feedback, contributing to improved product performance and reliability. What we offer: Opportunity to contribute directly to making ultra-deep geothermal energy a commercial reality. Chance to help establish and shape a new UK Product Centre from its early stages. Work with an experienced, international team of engineers and operations professionals. Competitive compensation and benefits in line with industry and local market.