Join the movement- subscribe to Wollongong, Let’s Get Salty on your favourite podcasting app.

Episode 12

Mark Swinnerton

Episode 12

Green Gravitational Storage with Mark Swinnerton

Whilst working as Vice President of Market Analysis for BHP, Mark realised it was really difficult to see how net zero climate scenarios were going to happen, but that these solutions were necessary to limit climate impacts. This shifted him onto a new path of thinking of “what more could be done, what do people need to stand up and find out and make happen over the coming years”.


Mark left BHP keen to activate something big to prove we can have our low-carbon solutions and our economy at the same time. Green Gravity will be instrumental in providing an opportunity for the next economic life of the very many disused mine shafts across the globe.


The sustainable solution will revive these vertical shafts and take advantage of their height to raise weighted steel objects with renewable energy, store these weights at the surface, and then use gravity to spin a turbine as these are lowered back down the shaft to generate electricity, to be directed straight into the grid when it is needed.


The Green Gravity team and its partners are working from flexible locations around the world, based at the Innovation Campus in Wollongong, helping industry gravitate towards a clean energy future.

We need to be able to add a lot more storage both in Australia and globally. We need those new solutions and that’s where gravitational energy comes into its own, and where it can start to have a huge impact where it actually improves the economics of the transition to renewable energy faster. Mark Swinnerton, CEO, Green Gravity.

Platinum Season and Gold Episode Sponsor

Platinum Season and Gold Episode Sponsor

Thanks to SOTO Engineering our Platinum Podcast Season 2 Sponsor. Changing the game, one industry at a time.

Your Next Salty Steps

Draw some inspiration from our actionable takeaways.

  1. Do you work in decarbonisation of mining, mine planning, mine closure planning, or mine rehabilitation? You could be a part of gravitating us toward a clean energy future, reach out to the Green Gravity Team.
  2. Are you passionate about investing your money in technology that is taking climate action now, and tangible solutions to provide clean and affordable renewable energy storage? Green Gravity is partnering now, read why GHD is getting behind the gravitational pursuit for clean energy storage.

Resources & Links

We’ve gathered together some useful resources and links related to Episode 12.

Green Gravity, Website

Green Gravity, LinkedIn

Mark Swinnerton, LinkedIn

Green Gravity’s ingenious energy storage solution, Australian Financial Review

Can abandoned mine shafts solve the renewable energy conundrum? Illawarra Mercury

Australian Technologies Competition 2022, Winner of Mining and Resources Category

National Energy Resources Australia, LETs Pitch Australia 2023, Winner



Imagery thanks to:

Green Gravity

Mariana Zurak, Relativity

Mario Schildermans from Pixabay


Would you like to support our mission? Wollongong, Let’s Get Salty has Platinum and Gold sponsorship packages. Editorial decisions remain impartial and independent.

Podcast Guests

Want to get ‘Salty’ with us? We’re always interested in hearing from experts, industry leaders, innovators and community members to discuss ideas and action.


Listen and Subscribe. The Wollongong, Let’s Get Salty Podcast is available on a variety of podcasting apps including Apple, Podbean, Castbox, Spotify and Google Cast.


Have a media enquiry or interview request? Get in touch and we’ll be happy to supply transcripts, supporting imagery, quotes and conduct interviews.

Salty Conversations

Podcast Host

“Our conversations are all about getting to the heart of why our local area is so special, what we can to do transform it and how we can enjoy a balanced and sustainable life in a way that is beneficial for nature, us, future generations and industry. We are custodians of this place, and can make a huge difference by evolving practices and behaviours at home and work, to have a huge impact on the future of our environment, community and industry.”

– Robyn Johnson, Director, Blend ESQ & Wollongong, Let’s Get Salty Podcast Host
Professional Bio

Stay up-to-date with industry news, insights and opinion from the Illawarra, Sydney and surrounding regions.

Contact Us.

Want to be a podcast guest, sponsor or cover an issue in the media? Let’s chat.