Courses/Trainings for NOC leaders

Hello there,

I am looking for recommendations -preferably based on experience- for
training/workshops for NOC engineers that have made significant difference
in root cause analysis, analytical thinking, troubleshooting skills and
problem solving skills.

Thanks,

Ramy

These books.

https://www.amazon.com/UNIX-Linux-System-Administration-Handbook/dp/0131480057

https://www.amazon.com/Practice-System-Network-Administration-Enterprise/dp/0321919165/
https://www.amazon.com/Practice-Cloud-System-Administration-Practices/dp/032194318X/
https://www.amazon.com/Time-Management-System-Administrators-Working/dp/0596007833/

Lots of SAGE workshops too, but these distil them quite well indeed.

--srs