Substation Technologist

Endeavour Energy; Sydney; On-site; AUD 90,000 - 130,000; Full time

Job summary

Ausconnex seeks an experienced Substation Technician to support high voltage substation assets across transmission and distribution networks in Australia. You will plan and execute maintenance, support outages, and collaborate with asset management to ensure reliable operation.

The role involves using SCADA/HMI interfaces for remote switching, developing maintenance plans, and contributing to commissioning and project activities within a multidisciplinary team.

Qualifications

• Electrical trade qualification is required.
• Experience working on HV substations 11kV–330kV.
• Knowledge of primary plant equipment and maintenance practices.
• Experience with fault-finding and inspections.
• Familiarity with industry standards and NSP processes.

Responsibilities

• Plan and execute maintenance activities in HV substations and BESS assets.
• Support maintenance programs and major outages.
• Collaborate with asset management to define outage scopes and schedules.
• Utilise SCADA/HMI to support remote switching operations.
• Develop maintenance strategies aligned with OEM requirements.
• Investigate faults and diagnose issues on primary equipment.
• Assist commissioning and maintenance across substations and renewable assets.
• Prepare technical reports and document maintenance, commissioning and project activities.

Skills

SCADA systems

Stakeholder engagement

Problem solving

Team collaboration

Leadership

Education

Electrical trade qualification

Tools

HMI interfaces

Job description

Ausconnex is a rapidly growing electrical contracting business geared to support major infrastructure in some of Australia's fastest-growing communities. Our services include large-scale electrical design and construction; sub-stations, relocating existing electricity network assets; connecting new developments; embedded networks; communication networks; street lighting; and the supply of transformers.

We are a wholly owned subsidiary of the Endeavour Energy Group which is 50.4% owned by a consortium of private investors including Macquarie Asset Management and AMP Capital. The remaining 49.6% is owned by the NSW Government. With the support of this structure Ausconnex has the unparalleled ability to plan and deliver large scale energy connections nationwide.

We are seeking an experienced Substation Technician to play a critical role in the planning, maintenance, commissioning and operational support of high voltage substation assets across transmission and distribution networks.

This hands-on role combines field-based technical work with collaboration across engineering, asset management and project delivery teams. You will be responsible for supporting the safe and reliable operation of primary plant equipment while contributing to major projects, maintenance programs and fault response activities across a diverse portfolio of HV assets.

If you have a strong background in transmission and distribution substations, enjoy problem-solving in complex environments and are passionate about delivering reliable energy infrastructure, we would like to hear from you.

About the role

As a Substation Technician, you will:

• Plan and execute maintenance activities for primary plant and equipment within high voltage substations.
• Support the delivery of maintenance programs and major equipment outages.
• Collaborate with asset management teams to develop outage scopes, isolation requirements and work schedules.
• Utilise SCADA systems and HMI interfaces to support remote switching operations.
• Develop maintenance strategies and work plans aligned with client and OEM requirements.
• Investigate faults and perform troubleshooting activities on primary plant equipment.
• Interpret OEM documentation, drawings and operational manuals to support fault diagnosis and rectification.
• Undertake commissioning and maintenance activities on substations, Battery Energy Storage Systems (BESS) and renewable energy assets.
• Provide technical guidance to engineering teams regarding constructability, compliance and industry standards.
• Prepare technical reports and documentation relating to maintenance, commissioning and project activities.
• Drive continuous improvement by identifying emerging technologies and best practice approaches within the industry.

About you

To be successful in this role, you will bring:

• Electrical trade qualifications.
• Extensive experience working on transmission and distribution substations from 11kV to 330kV.
• Strong knowledge of primary plant equipment, maintenance practices and substation operations.
• Experience planning and executing equipment inspections, overhauls and fault-finding activities.
• Understanding of relevant industry standards, policies and procedures.
• Experience working with Network Service Providers and their design, construction and approval processes.
• Strong communication and stakeholder engagement skills.
• Demonstrated ability to work effectively within multidisciplinary project teams.
• Familiarity with a range of primary plant manufacturers and equipment.
• Knowledge of 48V and 110V DC substation battery systems, ideally Magellan and Century Yuasa systems.
• Strong problem-solving, leadership and critical thinking capabilities.

Highly regarded

• Nationally recognised HV Plant Operating qualifications, including switching and switching plan development.
• Experience conducting HV switching activities.
• Certificate II in Fire Protection Inspection and Testing.
• Experience supporting commissioning and maintenance activities on BESS and renewable energy assets.

For further information, please contact [e-mail]

Applications close – 20 September 2026.

Our team is central to everything we do. At Ausconnex we foster a diverse and inclusive workplace that not only enhances our performance but also boosts our safety and resilience. We are dedicated to cultivating a work environment where every individual experiences a sense of safety, motivation, appreciation, inclusion, and respect.