Asst Instrument Maintenance Engineer

About Aster

Aster Chemicals and Energy (Aster) is a leading provider of chemical and energy solutions in Singapore and Southeast Asia. Aster is a joint venture led by Chandra Asri in partnership with Glencore Group. Building on the foundations of Singapore’s first oil refinery, our facilities on Pulau Bukom and Jurong Island serve as the nation’s hub for integrated refining and petrochemical production. Aster Bukom operates a 237,000 barrels per day refinery and a 1.1 million tonne per year ethylene cracker, while Aster Jurong Island produces essential petrochemicals that support industries across the region.

With over 60 years of heritage, Aster is shaping the future by driving progress and creating new opportunities for our people.  From advancing energy solutions to driving petrochemical innovation, we welcome you to join us in our journey that reflects our commitment to sustainability and operational excellence in an evolving industry landscape.

Together, we can achieve more—come be a part of it.

About the job

The Assistant Instrument Engineer provides hands-on technical support and assists in maintenance activities related to instrumentation in Production Unit. The role supports the execution of scheduled, emergency, and non-routine maintenance work, ensuring tasks are carried out safely, efficiently, and in compliance with site Health, Safety, and Environment (HSE) requirements.

Job Responsibilities:

• Provide day-to-day hands-on maintenance and troubleshooting support for instrument-related matters in Production Unit
• Ensure work is carried out in compliance with statutory obligations, Engineering Codes of Practice, and site standards.
• Support the execution of daily and weekly maintenance schedules by preparing materials, tools, and resources needed for assigned jobs.
• Assist in the planning and execution of Emergency & Schedule Breaker priority work repairs.
• Comply with all HSSE standards and requirements during maintenance activities.
• Perform SAP administration tasks such as updating time sheets, service entries, purchase and material orders.
• Provide updates on daily maintenance progress and support work order closure (MCMP, TECO, actual hours).
• Coordinate with Operations, Technology, and Procurement teams as required to carry out maintenance jobs.
• Supervise contractors in the field to ensure safe execution, productivity, and quality of work.
• Identify recurring instrumentation issues, support troubleshooting, and recommend improvements to enhance reliability.
• Assist in updating and maintaining spare parts inventory for instrumentation.
• Seek opportunities to improve work methods, procedures, and tools to deliver maintenance efficiently and within budget.
• Participate in scheduled safety walkabouts. Assess risks for day-to-day jobs and ensure appropriate control measures are in place.
• Contribute to the development of formal Job Hazard Analysis for jobs with medium and high risks.
• Ensure full compliance with Life Saving Rules and site safety requirements at all times.

Job Requirements:

• Minimum NITEC Level 2 certification in Instrumentation, Electronics, or Electrical, or a Diploma/Degree in the same fields.
• 3–5 years of relevant experience in instrumentation construction or maintenance in oil & gas, chemical, petrochemical, or related industries.
• Able to perform standby duty at Bukom site, as per revised schedule.
• Knowledge of instrumentation and control systems, including PLC, DCS, communication protocols (OPC, Fieldbus, Modbus, HART, Vnet), functional logic, and PID interpretation.
• Strong troubleshooting skills for instrumentation and control systems, with excellent analytical and problem-solving abilities.
• Experience with calibration of industrial instrumentation.
• Basic understanding of server system administration, including troubleshooting and maintenance procedures.
• SAP (GSAP) knowledge in Maintenance Module is a plus.
• Strong team player with experience in field work, stakeholder engagement, and contractor/vendor management. Able to work independently when required.

Work Location: Bukom

We thank you for your interest. Kindly note that only shortlisted candidates will be contacted for a discussion.