This is covered in the article: > For complex projects that span several teams across different offices and time zones, leading such a project is a full-time j

This is covered in the article: > For complex projects that span several teams across different offices and time zones, leading such a project is a full-time job for an engineer. Big Tech pulls in Technical Project Managers (TPMs) to manage these complex, and often strategic projects, taking the load off engineers. > Dedicated Program Managers or Project Managers still exist within Big Tech. They are typically tied to external-facing commitments and customers – such as a Program Manager for the Apple partnership – or to long-running initiatives, like a compliance program. Similar to how TPMs are not allocated to a single engineering team, these Program Managers or Product Managers also don’t tend to have an engineering team, but they work across many teams instead.