The fact your employer owns your work isn't a problem as such: you can submit a patch and it can be copyright by your company. So it's not about the fact you do

The fact your employer owns your work isn't a problem as such: you can submit a patch and it can be copyright by your company. So it's not about the fact you don't own copyright, it's about whether your company is willing to donate its copyrighted code (your patch) to these projects.