Absolutely. I work in cleantech, and you should, too! Solar and wind are economical, so now the biggest issue is scaling them up. That means tons and tons of problem solving, which means great engineering jobs!
If you think about it, the switch to renewables means we need to deal with situations where the sun isn't shining and the wind isn't blowing, yet still keep the lights on. That means you have to build in a ton of storage and load control, which means good communication and analysis, which means software! Something like half of the impact of the energy transition will be done through software optimizing the deployment and operation of clean energy assets.
Anyway, please check out my previous comments on recommendations when looking for climate impact work. Overall, the biggest impact per unit time spent is working as a regulator[1]. Next is working at a cleantech company[2].
[1]: https://www.reddit.com/r/energy/comments/8l5yhw/whats_the_be...