Admin Executive

ENTROPY LAB PTE. LTD.; Singapore; Hybrid; SGD 42,000 - 62,000; Full time

Job summary

Entropy Labs in Singapore is seeking a careful, dependable administrator to manage payroll, CPF submissions, AP/AR, and related finance tasks. The role features fixed morning hours, a monthly cycle, and close work with the Director, with hybrid office days planned in advance.

You will handle payroll processing, CPF contributions, supplier invoices in Xero, and day-to-day admin duties while ensuring accuracy and confidentiality in a small, growing team.

Qualifications

• 1 to 3 years of hands-on experience with payroll, CPF submissions and AP/AR
• Working knowledge of Xero, and confidence with Excel or Google Sheets
• A sound understanding of CPF contribution rules
• Meticulous attention to detail; you like to double-check your work
• A methodical way of working, and a preference for clear processes
• Reliability and discretion in handling confidential salary and financial information
• A calm, cooperative manner with colleagues, suppliers and customers
• The discipline to work independently and stay organised on work-from-home days

Responsibilities

• Payroll and CPF: Prepare monthly payroll accurately and on schedule
• Calculate CPF contributions and submit payment by the monthly due date
• Maintain organised, up-to-date employee and payroll records
• Check figures carefully before submission and keep supporting documents on file
• Accounts payable and receivable: Record supplier invoices in Xero and prepare payments for approval
• Issue customer invoices and keep track of amounts due
• Follow up courteously on outstanding payments
• Reconcile bank transactions and keep the accounts tidy for month-end
• Procurement: Raise purchase orders and obtain quotations from suppliers
• Match purchase orders, delivery orders and invoices before payment
• Maintain supplier records and a clear log of purchases
• General administration: File documents, support the Director, improve procedures

Skills

Payroll

CPF submissions

AP/AR

Detail oriented

Process documentation

Independent work

Tools

Xero

Excel

Google Sheets

Job description

About Entropy Labs

We make buildings cooler without switching anything on.

Entropy Lab is a deep-tech spin-off from Nanyang Technological University, founded in January 2025. Our product, PasteCool, is a water-based coating that reflects 95% of incoming sunlight and radiates trapped heat backout to the sky - no power, no moving parts, no maintenance.

The numbers behind it:

• Runs 5°C cooler than the next best cooling paint - tested head-to-head against six competitors
• 95% solar reflectance and 95% atmospheric thermal emissivity
• Surface temperature reductions of up to 28.5°C in field trials
• Zero VOC,fully water-based, and over 20% more durable than standard paint with a 5-7year lifespan
• Already deployed on roofs, walls, containers and industrial assets in Singapore, China and the USA

Our market is construction, built environment and logistics - anyone paying to cool a space that the sun is heating up for free. In Singapore, that is almost everyone.

More at entropylab.com.sg

About the role

We are looking for a careful, dependable person to look after the administrative and finance routines that keep our company running smoothly: payroll, CPF, purchasing, and accounts payable and receivable.

This is a steady role with a predictable monthly cycle. The responsibilities are clearly defined, the hours are fixed, and you will work directly with the Director, who is available to answer questions and give guidance. You will have the time and space to do your work thoroughly and to get the details right.

What you will do

Payroll and CPF

• Prepare monthly payroll accurately and on schedule
• Calculate CPF contributions and submit payment by the monthly due date
• Maintain organised, up-to-date employee and payroll records
• Check figures carefully before submission and keep supporting documents on file

Accounts payable and receivable

• Record supplier invoices in Xero and prepare payments for approval
• Issue customer invoices and keep track of amounts due
• Follow up courteously on outstanding payments
• Reconcile bank transactions and keep the accounts tidy for month-end

Procurement

• Raise purchase orders and obtain quotations from suppliers
• Match purchase orders, delivery orders and invoices before payment
• Maintain supplier records and a clear log of purchases

General administration

• Keep documents filed in an orderly way, both digital and physical
• Support the Director with day-to-day administrative matters
• Help document and improve our procedures, so that every task has a clear andconsistent way of being done

What we are looking for

• 1to 3 years of hands-on experience with payroll, CPF submissions and AP/AR
• Working knowledge of Xero, and confidence with Excel or Google Sheets
• A sound understanding of CPF contribution rules
• Meticulous attention to detail; you like to double-check your work and are uneasy leavingloose ends
• A methodical way of working, and a preference for following and maintaining clearprocesses
• Reliability and discretion in handling confidential salary and financial information
• A calm, cooperative manner with colleagues, suppliers and customers
• The discipline to work independently and stay organised on work-from-home days

What you can expect from us

• Stable, fixed morning hours that leave your afternoons free
• A consistent routine built around a regular monthly cycle, with few surprises
• Clear expectations and well-defined responsibilities from day one
• A proper handover and time to settle in and learn our systems
• A supportive Director who is approachable and values accuracy over speed
• A hybrid arrangement with office days planned ahead
• A small, respectful team where careful work is noticed and appreciated