At Quadrant Search and Selection we work with a large range of clients across the economic, regulatory, and policy spectrum. These include regulators, industry clients, consultancies, think tanks, and trade bodies.
Our clients include.

Regulators:
OFT
Ofwat
Ofgem
Legal Services Board
Civil Aviation Authority
ORR
Tenant Services Authority
PPP Arbiter

Industry:
Centrica
Interconnect
Gazprom
Royal Mail
Southern Water
Thames Water
Anglian Water
United Utilities

Consultancies:
Deloitte
PwC
Ernst & Young
Arup

Payment Service Companies
Vocalink

Transport
CAA
BAA/Heathrow
Easyjet
Gatwick Airport
Network Rail
Rail Delivery Group
ORR
NATS
TFL
Tubelines

Telecoms
Ofcom (previously, Postcomm)
BSkyB
Telecoms Departments within consultancies
3UK
BT

Trade bodies/Consumer bodies:
Water UK
Consumer Council for Water
Energy Retail Association