Senior Site Administrator

4 days ago

Hunter Valley NSW, Australia Mastermyne Group Full time $90,000 - $120,000 per year
  • Monday - Friday, 45-hour week | Site-based role
  • Permanent full-time opportunity | Ongoing training & career development
  • Ideal for Narrabri or Gunnedah locals
  • Also offering chartered flights from Wollongong and Newcastle + Camp & Meals
  • Ongoing training and development opportunities

About the opportunity

Mastermyne has been a trusted partner of Whitehaven Coal since 2016, supporting operations at the Narrabri underground coal mine in New South Wales. With active contracts in Cut and Flit, as well as Gateroad Development, we take pride in our strong track record of delivering safe, efficient, and high-quality services. We are now seeking an experienced Senior Site Administrator to join our team and support our operations in delivering a successful project, while continuing to strengthen our valued partnership with Whitehaven.

About the role

The Senior Site Administrator reports to the off-site Administration Coordinator and works closely with the Site Administrator, Project Manager, and site-based team to provide high-level administrative and financial support across our contracts. In addition to general administration support and fleet maintenance scheduling, this Senior role requires proven experience in managing complex contracts and financial functions, including budgeting, KPIs, invoicing, payroll, accounts receivable, and debtor management. Strong attention to detail and the ability to engage effectively with stakeholders at all levels is essential.

Our ideal candidate will possess the following attributes:

  • Strong analytical and problem-solving skills
  • Excellent interpersonal and client relationship abilities
  • High-level written, verbal, and numerical communication skills
  • Proven ability to manage multiple priorities and deadlines
  • ERP experience (Pronto desirable)
  • Intermediate to advance Proficiency in MS Office (Advanced excel desirable)
  • Qualifications in Accounting or Business (preferred)

What we can offer you:

The benefits of working for us extend way beyond your weekly salary. In addition to a competitive salary we offer:

The Mastermyne "Extras":

  • Reimbursement for the cost of approved courses and study;
  • Paid study days for University study;
  • Mastermyne tailored leadership programs;
  • 2 Year anniversary watch + gifts for additional years of service;
  • Baby Benefits – Primary & Secondary Caregiver's new arrival bonus and benefits to help parents support their family;
  • A Bloody Great Cause – be rewarded each time you reach a Red Cross Blood Donation Milestone;
  • Hospital Help – have $250 contributed towards your private health hospital excess;
  • Medibank Corporate Private Health Insurance discount of 8%;
  • Employee Recognition Rewards - You're a keeper
  • Family Christmas parties & Employee Christmas gifts;
  • Group Income Protection Insurance, discounted premiums;
  • Reimbursement for prescription safety glasses ($350);
  • Salary Packaging – boost your back pocket
  • Ride in Style – Motor Vehicle Novated Leasing & Toyota Fleet Discounts;
  • Qantas Club Membership Discounts;
  • Employee Assistance Program (EAP), well-being assistance that's free for all the family;
  • Emergency shelter accommodation and paid domestic violence leave.

We have a strong philosophy of growing our own at Mastermyne. No matter your role we support our people to ignite their own learning journeys. It's part of how we do business and is one of the reasons why people stick with us. We've proven that the Mastermyne Way goes a long way.

If you want to be part of our Narrabri project contact Cass Mayer, Recruitment Manager on or

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