We (Workiva) currently have an open rec looking specifically for people like you: engineers who are interested in pivoting into security. You're more experienced than the baseline that rec is designed for, but that's where negotiation comes into play :)
I hope you check us out: https://workiva.wd1.myworkdayjobs.com/en-US/careers/job/Ames...
If not with us us, then I have no doubt you'll find other companies looking for something similar. People in your shoes are in high demand.