I'm looking to go for the Certified CISO certification & training as I'm an aspiring CISO. Any recommendations and additional certifications that I should be doing along with that? I already have CISSP. 

There are a few out there but honestly not worth it IMO. Instead having great mentors is the way to go.

Why do you think you need a certification as a CISO?

If you're looking to learn more about CISO training, there are free online resources available. Alternatively, if you prefer a more immersive experience with hands-on sessions and fieldwork, consider university-offered programs. Top institutions like NYU Tandon and Carnegie Mellon offer specialized programs in this field. I've personally benefited from one such program at NYU.

https://cynomi.com/academy/tools/

https://secure-anchor.com/consulting/

https://fractionalciso.com/how-to-become-a-virtual-ciso/

If you really want an executive level certification that is close to CISO, ISACA CISM or GIAC GSLC/GSTRT are considered the next step. However, I argue at this point in your career you should take a more practical approach. Many certifications at that level provide the same type of wide range knowledge in the concepts. Take training courses and summits that focus on real world trends and insights into the position. If you can, also find a mentor that can provide input and help guide you to the right path as a CISO.

CCISO