A consulting client, expanding rapidly in the cloud, asked me for advice on how to understand the culture at phone companies. In the cloud/webscale world, mistakes happen often and are fixed quickly. That's usually impossible in telecom. Networks take years to build. A fast 5G rollout is 3-4 years. 5 years or more is common. You can't turnaround quickly.
Don't underestimate the tech people in telecom. Almost all very smart and capable. Few have fancy degrees, Almost all have worked their way to the top against a thousand others. Most are lifers and have spent many years at the same company. They believe outsiders don't understand the business. They are usually right.