What degree to pursue for data center cooling?

I've been working as a union sheet metal worker for 15 years and I love my career. The first 10 years of my career I did a lot of troubleshooting, design, and engineering of machines that produce food and pharmaceuticals. I would also build and implement those solutions. I LOVED that. I then moved to another state where a huge majority of the work is hvac. This area pays double what I made before and the work is very easy. I recently was transferred to the special projects group of the company I work for. I've been working on retrofitting server rooms to create hot/cold aisles including designing and implementing solutions to create and install the custom barricades. This has reawakened the passion I had when I first started of effectively being a "dirty hands engineer". I started deep diving on various methods of temperature regulation and learned of immersion cooling and cold plate cooling. I also learned that my company has partnered up with another company to improve upon these methods and as well reclaim the heat and utilize the heat (I'm not in that project so I don't know what for, how, etc.). This research and design is something I would LOVE to get into. With the rise of power hungry AI and quantim computing and the need to keep those servers cool I foresee an increasing demand for solutions surrounding this technology.

My question is this, what degree would you suggest to get the technical knowledge to work on these systems? Computer engineering? Electromechanical engineering? I'm not sure. I will be reaching out to my company and my union next week to ask them the same question, but I figure there are likely folks in this subreddit who do exactly what I'm looking to get into.

Thanks for your time and I look forward to reading your ideas and suggestions!

Edit to clarify: I am a licensed HVAC technician. I want to get into the cutting edge immersion cooling stuff.