H. Pierson is a wonderful company, i had an opportunity of meeting with a couple of their staffs and yes they work with various banks. I was sent there by a Zenith staff.
Hpierson's location is by zenith bank 2nd entrance i.e the entrance closest to cable point estate main gate. if you can't find your way around lekki, at least you should be able to identify zenith bank if you see it.

thank you