Careers at JST Group
Join Southeast Asia's leading integrated services group. We are always looking for talented people to grow with us.
Petroleum Engineer
Location: Bangkok, Thailand (with Asia-Pacific exposure) Experience Level: 10–15+ Years Employment Type: Full-Time, Permanent 🌟 About the Role We are seeking a high-caliber Senior Petroleum Engineer to drive production optimization, well intervention planning, and resource management. In this role, you will lead well reviews, model reservoir performance, and directly impact our field depletion and business plans. If you have a strong background in Reservoir Engineering and simulation, this is your opportunity to lead high-impact asset strategies. 🎯 Key Responsibilities 🔹 1. Production Optimization & Modeling • Monitor & Maximize: Track daily field production and optimize well/platform injection and disposal. • Aesthetic Modeling: Conduct well performance modeling and reservoir productivity using Prosper. • Data Strategy: Identify subsurface gaps and request PVT samples or pressure transient tests. • Lead Teams: Coordinate and lead comprehensive Well Reviews and water management plans. 🔹 2. Well Interventions & Drilling Support • Planning: Prepare technical recommendations for well interventions and workovers. • Design Support: Assist with artificial lift, completion designs, and trajectories for horizontal wells. • Operations: Support drilling teams with cement evaluations, integrity logs, and perforation intervals. • Slot Recovery: Identify and prepare slot recovery proposals for DMF documentation. 🔹 3. Reservoir & Resource Management (10-25%) • Forecasting: Generate short-term and Life of Field (LoF) forecasts for year-end reserves. • Decline Curve: Estimate reserves and production using DCA software. • Depletion Plans: Maintain reservoir depletion plans and update reserves databases. 🔹 4. Business Planning & Economics • Economic Evaluation: Run project economics using PEEP and Excel models. • Budget Control: Manage annual/monthly Capex/Opex estimates and perform variance analysis. 📋 Candidate Qualifications 🎓 Education & Background • Degree: Bachelor’s degree in Petroleum, Reservoir, Chemical, or Mechanical Engineering. • Plus: A Master’s degree in Reservoir Engineering is highly advantageous. 💼 Experience Required • Industry Track Record: 10–15+ years of reservoir/petroleum engineering experience. • Simulation Expert: 3–5 years of hands-on reservoir simulation experience. • Software Mastery: Must be proficient in Petroleum Experts (MBAL, Prosper, GAP, PVTP), OFM, and PEEP. • Asset Modeling: Experience with Petrel RE and Eclipse E100/300 is preferred. • Global Mindset: Experience working within the Asia-Pacific region; QRE status is a plus. 🗣️ Key Skills • Languages: Full professional proficiency in both Thai and English (Written & Spoken). • Strategic Thinking: Ability to translate complex technical engineering data into business objectives. 💡 Why should you apply for this position? • Work on complex, high-value asset portfolios. • Collaborate with a dynamic, cross-functional international team. • Competitive salary, bonus, and comprehensive corporate benefits.
Mud Logger
-With at least Two (2) years’ experience in Mud Logger position with one (1) year’ experience in Southeast Asia operation to perform SERVICES. -Mud Logger should be graduate in Geology or an equivalent degree and Sample Cather should be graduate in Geology. -And should have Basic offshore safety training. -Work Location(s): Gulf of Thailand (our base will be in Songkhla) -Working Days & Hours: Working Hours - Operation goes on as 24*7, so it will be 12 Hrs. per day (Day / Night), Working Days - 28 Days On / Off Benefits & Welfare: 1,700THB/Offshore working day only
Night Coach Drilling Supervisor
US$850 nett per offshore day, US$425 per onshore day. No remuneration for Travel/Standby/Training Days. Contract until 31 Dec 2026 (Possible to extend). 28/28 rotation.
Mechanical Engineer
• More than 1 years working experience, • Diploma Degree or above; • Be able to communicate with English in in daily work, • Experience working on Rotary Steerable System (RSS); • Understanding Directional Drilling (DD)& Measurement While Drilling (MWD)& Logging While Drilling (LWD) basic knowledge.
Lab Engineer
• More than 1 years working experience, • Bachelor's degree • Be able to communicate with English in in daily work, Experience working on maintenance work of Directional Drilling (DD)& Measurement While Drilling (MWD)& Logging While Drilling (LWD) equipment • Understanding Directional Drilling (DD)& Measurement While Drilling (MWD)& Logging While Drilling (LWD) basic knowledge.
Coordinator/Senior Engineer
• More than 3 year working experience • Diploma Degree or above • Be able to communicate with English in in daily Work • Understanding for the formula of wireline logging and directional drilling, can coordinates operations, validates job plans, allocates resources, and provides senior-level technical support. • Acts as the main interface between field operations, clients, and support functions.
Directional Drilling (DD) Lead Engineer (Offshore)
• minimum 5-year experience in industry and working on the rig site • minimum 2-year experience as directional driller with mud motor experience • has experience in fast-paced drilling operations for at least 10 wells • The experience of the personnel proposed to work under the Contractor shall be considered and counted up to the date of technical submission.
Radioactive Safety Officer
• More than 1 year working experience • Bachelor's degree • Be able to communicate with English in in daily Work • Responsible for control, storage, transportation, and regulatory compliance of radioactive sources used in logging operations. • Ensures radiation safety and documentation. • Candidates shall hold valid radioactive materials supervisor certifications and qualifications that fully comply with the relevant regulations and requirements of the Thai government authorities. • Prior experience in the petroleum and drilling sector will be an advantage
Wireline Logging Coordinator
We are looking for a candidate with demonstrated experience in the following areas: • Plan and oversee Wireline Logging Operations • Coordinate between Field, Client, and Drilling Team • Review Job Plans and Technical Requirements • Manage personnel and equipment allocation, and troubleshoot operational issues
Manager - Account Department
Job duties -Established and setup full of accounting process and policies, and compliance in accordance with Thai regulations. -Handle full cycle accounting operation ensure accurate monthly, quarterly, and annually closing processes, consolidation package transparency and timely reporting and statutory submissions. -Prepare Financial statements compliant with TFRS-NPAE, Local GAAP, IFRS Monetary/Non-monetary, Deferred Tax, IFRS 16 Lease ROU and Transfer pricing (TP Local file). -Verify ensure accuracy of accounting transactions including GL, AP, AR, Inventory, OPEX/CAPEX, CIP, Depreciated. -Liaise closely with HQ Finance accounting on FX contract, forecasting, J-SOX and auditing matters. -Manage and control to ensure compliance with taxes law and taxes filling including VAT, PT.40, PP.30, PP.36, PND.54 and corporate taxes. -Coordinate with external auditor, banks and government authorities. -Maintain task in responsible to meet the deadline of monthly closing (within 3 business days). -Lead and develop a team of 5 accountants, fostering a high-performance culture. -Others as assigned by leader and/or superior. Benefits & Welfare: Welfare & Benefits (after pass 90 days probation) 1.Diligent: 500.-/month (if no late, no leave, no absence) 2.Group insurance: for IPD, accident 3.Medical fee: 30,000.-/year 4.Dental fee: 5,000.-/year 5.Spa or fitness or family medical: 6,000.-/year 6.Provident fund: 5%, 10% , 15% from basic salary (*Company contributed only 5%) 7.6 days annual leave for first 3 years, from year 4th will be 1 day additional (Maximum not over 12 days annual leave) 8.Annual health check 9.Company trip 10.New Year Party 11.Yearly Bonus (as per company’s decision), pay date on December – For new employee, must pass probation before payment bonus date. 12.Salary Increment (on January) – For new employee, must have working period over 6 months. {mean: entering the company before 1st of Jul