System Engineer

Wärtsilä Energy Storage is powering the shift to a cleaner, more resilient grid.

We work at the front lines of the energy transition, helping partners around the world maximize the value of renewables through grid-scale battery systems, advanced software, and expert services. Our portfolio includes the industry-leading GEMS Digital Energy Platform, utility-scale battery solutions, and lifecycle services that keep storage assets optimized and ready when it matters most.

With over 17 GWh of storage deployed or under contract across 130+ projects globally, we’re shaping how the grid of the future works.

In a world of rising complexity and accelerating change, we’re looking for future-focused talent to help us design, deliver, and support the energy systems of tomorrow.

Sound like your kind of challenge? Let’s build it together. 

We want to transition the world towards a decarbonised and sustainable future. By pushing the boundaries of engineering and technology, we can make it work. We are always on the lookout for future-oriented talent – want to join the ride?

The position of Systems Engineer ("SE") will be part of the growing Project Delivery Team and report to Manager of Project Delivery. The SE are responsible to oversee the Project Design (Electrical Design Package, Communication, and minor Software), Commissioning, and Technical Support of AC and DC electrical systems associated with utility-scale Battery Energy Storage Systems (BESS). Applicant should have a solid understanding of fundamental electrical engineering, project management and construction principals, as well as experience designing high power electrical systems. This position will be a member of Wartsila's internal and customer technical Subject Matter Expert Team for ESS Products and Projects and will work closely with the following group: Software Delivery, Product Delivery, Project Management, Commissioning Manager, and other various groups to ensure ESS projects fulfil customer functionality and contract requirements.

Your main responsibilities are：

• Collaborates with the relevant team in the preparation and coordination of projects technical materials
• Establish and maintain the engineering, design criteria and applicable standards and specifications for the ESS project
• Interface with external product vendors to understand the specification(s) and function(s) of their product(s) and service(s)
• Specify appropriate system components, calculate component ratings and quantities, and create detailed bills-of material for energy storage projects
• Review detailed electrical plans produced by others and provide precise organized feedback in a timely manner
• Review project technical specifications and provide feedback to ensure that project requirements will be met
• Perform site visits and ESS field inspection in advance to check any risks from engineering side.
• Tier 2 project technical support for internal and external stakeholders
• Ability to travel to domestic and international project sites and/or vendors (Approx. 10 - 15%), should reside close to a major airport.
• As a minimum, Electrically proficient in:

* Using electrical modelling software (e.g. ETAP /  Powerfactory or similar)
* Conducting Load Flow, Short Circuit and  Arc Flash Calculation
* AC / DC Cable Loss Calculation

You will shine in this role when you have:

• Familiar with lithium-ion battery
• Familiar with relevant codes and standards for ESS and inverters (AS, IEC, NEC, IBC, IFC, NFPA, UL)
• Excellent verbal and written communication skills, including ability to effectively communicate highly complex engineering, construction, and operational issues
• Experience and understand in CAD drawing
• Experience with utility scale energy storage and renewable energy projects and products (bi-directional inverters, various battery chemistries, PV, wind turbines, flywheels, etc.).
• Understanding of Inverter, Converter, Transformer, Battery, Circuit breaker, Fuse, AC/DC power supply electrical equipment.
• Applicant should be able to explain in detail the electrical principals of voltage, current, real and reactive power, energy, charge, AC/DC voltage, single-phase, and three-phase power, and other fundamental electrical engineering concepts.
• Applicant should be able to read and understand drawings of electrical controls. Especially single-line, three-line, fire safety systems, and communication diagrams.
• Knowledge of multimeters, oscilloscopes power quality analysis, harmonics, and their operation.
• Ability to configure and troubleshoot programmable logic controllers (PLC) and industrial electronic equipment (protection relays, inverters, BMS, etc.).
• Experience with industrial control methods and SCADA systems.

Minimum Skills Requirements:

• Minimum Bachelors or Master's degree in Electrical, Mechanical or Power Engineering, or equivalent work experience
• 3 years of experience with renewable energy with distribution or transmission level Energy Storage System
  
  

Why you and us 

We have an amazing team and a clear purpose to exist. We are passionate about the work we do and hope to find a colleague with a shared passion for smart technologies and a sustainable future.

All our employees are encouraged to utilise the variety of training activities, learning solutions and self-study materials that we have to offer which supports the opportunity to further develop your talents and competencies within a very global working environment, in an ambitious and growth orientated organisation. 

Contact & next steps

Submit your application before the deadline through our Careers portal. Applications through email will not be considered. After submitting your application you’ll receive a confirmation email. We try our best to get back to everyone within 2-3 weeks after application deadline.  

Please apply by 20/08/2026   at 23:59 Australian Standard Time. Our recruiting tool recognizes the time zone where the job ad has been published and closes the application period according to same time zone

Last application date: 20/08/2026 

At Wärtsilä we value, respect and embrace all our differences, and are committed to diversity, inclusion and equal employment opportunities; everyone can be their true self and succeed based on their job-relevant merits and abilities. 

Please note that according to Wärtsilä policy, voluntary consent for a security check may be required from candidates being considered for this position, depending on the applicable country. 

This is Wärtsilä  

Wärtsilä is a global leader in innovative technologies and lifecycle solutions for the marine and energy markets. Our team of 18,300 professionals, in more than 230 locations in 77 countries, shape the decarbonisation transformation of our industries across the globe. Read more on www.wartsila.com. 

#WärtsiläEnergyStorage