Best closed-back to use in the office.

[Voltron]

Thanks Dusty, and I think you are right about the Sonys because I just found those 

[n_maher]

https://a.co/d/dvFqpzY

If she's an iPhone user, probably pretty hard to beat these - pun intended.

[grawk]

I meant the wh1000s sorry. 

[Kabeer]

my vote is for the Audeze Maxwell. Very good sound for a closed back.
I far preferred it to the DCA and Hifiman closed offerings.

I haven't heard the latest Sennheiser 630 yet though.