[jamstruth]

Do you work in the High Energy Magic building of the Unseen University? Giving Hex[1] the keys to summon demons sounds like a bad idea.

[1] https://en.wikipedia.org/wiki/Hex_(Discworld)

[NoGravitas]

Or possibly at the Laundry[0]?

[0]: https://en.wikipedia.org/wiki/The_Atrocity_Archives