Senior Assistant, Admin

About the Role

The Admin Assistant (Operations Support) provides administrative support for billing, order documentation and customer invoicing. The role works with Operations, Marketing, Supplies, Finance and other teams to ensure documents are complete, accurate and submitted on time. This entry-level position is suitable for a careful and organised individual who is willing to learn billing and operational processes.

Key Responsibilities

• Check billing requests, customer purchase orders, billing templates and supporting documents for completeness and the required approvals.
• Verify basic information such as rates, calculations, rebates, fee limits, credit terms and customer billing instructions using approved records and templates.
• Highlight missing information or discrepancies to the supervisor or relevant team for clarification.
• Prepare and process billing documents accurately and within the required timelines under guidance.
• Assist with billing exceptions, including credit-limit or credit-term issues, by notifying the appropriate stakeholders and tracking follow-up actions.
• Support routine order-management activities, including recording customer purchase orders, updating sales orders or billing plans, and linking documents to the relevant project or service order.
• Update billing-status, unbilled and miscellaneous-recoverable trackers to provide an accurate record of items pending billing.
• Assist with regular reviews and reconciliations of miscellaneous recoverable and sundry billing items, and refer aged or unresolved items to the supervisor.
• Support the verification of handling fees, currency conversions and hedge-rate information based on instructions from Treasury or Finance.
• Compile routine billing and operational reports, track outstanding actions and provide status updates to the relevant stakeholders.

Requirements

• Nitec, Higher Nitec, Diploma or equivalent qualification in Business Administration, Accounting, Finance, Operations Management or a related discipline.
• Up to two years of relevant administrative, billing, invoicing, order-processing, accounts-support or document-control experience would be advantageous.
• Basic numerical skills and good attention to detail.
• Basic proficiency in Microsoft Excel and Microsoft Office, with a willingness to learn new systems and processes.
• Good organizational and time-management skills, with the ability to follow instructions and complete assigned tasks on time.
• Clear written and verbal communication skills, with the confidence to seek clarification when information is incomplete.
• Basic exposure to SAP, billing systems or finance transactions would be advantageous but is not required.
• Experience from an internship, temporary assignment or junior administrative role in aviation, maintenance, engineering services, project billing or another documentation-intensive environment would be advantageous.

About the Company

ST Engineering is a global technology, defence and engineering group with a diverse portfolio of businesses across the aerospace, smart city, defence and public security segments. The Group harnesses technology and innovation to solve real-world problems, enabling a more secure and sustainable world. Headquartered in Singapore, it has operations spanning Asia, Europe, the Middle East and the U.S., serving customers in more than 100 countries. ST Engineering reported revenue of over $12b in 2025 and ranks among the largest companies listed on the Singapore Exchange. It is a component stock of MSCI Singapore, FTSE Straits Times Index and Dow Jones Best-in-Class Asia Pacific Index

About Commercial Aerospace business

ST Engineering’s Commercial Aerospace business is a world-class Original Equipment Manufacturer (OEM) and Maintenance, Repair and Overhaul (MRO) service provider with proven solutions for practically every stage of an aircraft life cycle. With 50 years of reputable track record in aviation, backed by a highly experienced team of engineers and technicians across facilities in Asia Pacific, the U.S. and Europe, we know what it takes to keep the world flying safely.