Sizing Engineering Teams

What is the optimal size of an engineering team? How many managers should a manager of managers support? How can we stay on the path of a high performing team?

I had all these questions and a lot more when I first started managing engineers at Concur/SAP years ago. However, at that time I was managing mostly down and I had only one team. As I kept progressing in my career, and I kept educating myself on this topic, I…