HR and Administration Coordinator

Mission Systems Pty Ltd; Sydney; On-site; AUD 34,000 - 48,000; Part time

Job summary

Mission Systems Pty Ltd in Sydney, Australia, is seeking an organised HR and Office Administration Coordinator for a flexible, part‑time role. The position combines HR administration, recruitment and onboarding support, and general office coordination within a small, collaborative team.

The role is primarily based at our Lane Cove West office, with working hours discussed and agreed with the successful candidate. A friendly, flexible environment supports work‑life balance.

Qualifications

• Experience in HR administration or office administration.
• Flexible, part-time role with good work–life balance.
• Discretion handling confidential information.
• Strong organisational and communication skills.

Responsibilities

• HR Administration: prepare employment contracts, variation letters and employee correspondence, maintain HR records and dates.
• Recruitment: coordinate recruitment administration, interviews and candidate communication; reference checks and pre-employment requirements.
• Onboarding: coordinate onboarding activities; prepare new-starter documentation and induction schedules.
• Office Administration: manage day-to-day office operations, stationery, supplies and invoicing; maintain records.
• Facilities: arrange office passes/keys; welcome visitors and assist with sign-in; coordinate meeting rooms.

Skills

HR administration

Office administration

Recruitment

Onboarding

Organisation

Communication

Education

HR qualification (optional)

Job description

We are looking for an organised, approachable and hands‑on HR and Office Administration Coordinator to join us in a flexible, part‑time position.

We understand that experienced people may be looking for a role that provides meaningful and interesting work while supporting a healthy work–life balance. We are therefore open to discussing flexible working hours, including hours structured around school or other personal commitments.

This opportunity may suit an experienced HR or administration professional returning to the workforce, seeking a better balance, or wanting to continue developing their HR experience in a supportive small‑company environment.

The role combines HR administration, recruitment and onboarding support, employee record management, office coordination, support to the Directors and general administration. It is a practical and varied position where no two days will be exactly the same.

Because the role supports our employees, visitors and day‑to‑day office operations, it will be primarily based at our Lane Cove West office. The specific working days and hours can be discussed and agreed with the successful candidate.

Key responsibilities

HR Administration

Assist in the preparation of employment contracts, variation letters and employee correspondence using approved templates

Maintain confidential employee files and HR records

Coordinate recruitment administration, interviews and candidate communication

Assist with reference checks and other pre‑employment requirements

Coordinate onboarding and offboarding activities

Prepare new‑starter documentation and induction schedules

Ensure employment forms and acknowledgements are completed

Maintain leave, training, probation and performance‑review records

Monitor important HR dates and follow up required actions

Respond to routine employee enquiries and refer complex matters appropriately

Office Administration

Coordinate the day‑to‑day administration of the office

Order stationery, kitchen supplies and office consumables

Monitor supplies and arrange replenishment

Obtain quotes and place approved orders

Receive deliveries and arrange couriers

Maintain organised electronic and physical records

Coordinate meeting rooms and shared office spaces

Assist with invoices, purchasing records and general documentation

Arrange office passes, keys and approved workplace access

Welcome visitors and assist with sign‑in arrangements

About you

You may already have experience in HR administration, office administration or a combined support role and are now looking for a flexible, part‑time position where your contribution will be valued.

You will be someone who:

is organised, dependable and attentive to detail;

enjoys supporting employees and helping an office operate smoothly;

handles personal, confidential and sensitive information with discretion;

communicates clearly, professionally and respectfully;

can manage competing priorities and follow tasks through to completion;

uses initiative while recognising when guidance or approval is required;

is flexible, practical and willing to assist wherever reasonably needed; and

understands that routine administrative tasks are just as important to the business as other responsibilities.

Formal HR qualifications would be well regarded but are not essential. Practical experience, sound judgement, reliability and a genuine willingness to help are equally important.

About us

Mission Systems is a small Australian engineering and technology company specialising in advanced autonomous and robotic systems for defence and other demanding environments. We are a collaborative, practical and growing team. Because we are a small company, our employees work closely together and everyone's contribution matters.

Opportunity to work closely with employees and Directors

Varied responsibilities across HR and office administration

Ability to develop broader HR knowledge and experience

Genuine ownership of important day‑to‑day activities

Friendly and collaborative small‑company environment

Opportunity to contribute to an innovative Australian engineering business

Flexible working hours that may be structured around personal or family commitments