Yeah. That's actually the only way to get a TN -- to oversee technical work in a managerial capacity. Technical managers of software engineers are 100% able to enter under TN.

What do you mean it's the only way? Computer engineering is a valid TN employment category, among many others.

Sorry - I mean the "only way" as a manager, not as a software/technical professional.

You can't for example, use manager of a McDonalds to qualify as a manager under a TN as far as I understand it. If you are a manager, you need to be technical in nature.