About the Union · Est. 1921

The union built
by mining
professionals.

The Collieries' Staff and Officials Association (CSOA) is your union for managers, supervisors, professionals, engineers, technical, administrative and clerical workers in the mining industry.

CSOA members at a mine site Aerial view of mining equipment
Our Story

A century of representation for mining staff.

Since 1921, CSOA has been the primary union representing staff and supervisors in the coal mining industry. For years, our members have shaped entitlements and conditions across the industry and have been responsible for countless high-profile wins and landmark legal decisions improving the lives of mining staff and supervisors.

Our team of workplace representatives, organisers and legal officers leverage that experience to provide representation and advocacy for professional staff across all mining related industries.

Mining professionals in a planning meeting
"CSOA is here to support you when you need it most."
What's Included

Every CSOA member receives all of this.

From day one of your membership you have direct access to a national team of legal, industrial and workplace experts who understand the mining industry.

01

Industrial Legal Advice

Expert legal officers on call for industrial matters affecting you and your worksite.

02

Workplace Representation

Support in disputes, consultation processes and individual matters when you need it most.

03

Enterprise Bargaining

We negotiate collective conditions on your behalf when members at your site want to bargain.

04

Member Advantage Discounts

Exclusive savings and rewards through our Member Advantage program.

05

A National Network

Join a dedicated community of professionals across the Australian mining industry.

Ready when you are

Stand with the union for
mining professionals.

Join thousands of mining staff and supervisors backed by a century of representation, advocacy and hard-won industrial wins.

Join CSOA Today
© 2026 Collieries' Staff and Officials Association