Canonical has certified a range of hardware for Ubuntu use. This includes the Lenovo P1/X1 Extreme (I run Pop OS on the former), a variety of Dells, and many other high-quality laptops that your IT team may be comfortable supporting.

https://certification.ubuntu.com/

I appreciate the work that System76 has put into smoothing out many of the rough edges of using Linux on a laptop but haven't felt compelled to consider their products, nor those from other boutique vendors. They all appear to be relatively expensive vs Lenovo/Dell etc and, at times, look to be clunky/have inferior build quality.