Global Construction Insurance

538 Underwriting

London based Managing General Agent focusing on providing class-leading solutions for clients globally


Incorporated in 2018 as a wholly owned entity of PSC Insurance Group Ltd, 538 Underwriting focuses on providing insurance for Construction projects across the globe. Concentrating on small to medium sized risks we aim to provide 100% solutions at market leading terms and conditions.

Utilising Lloyd’s and Company A rated security we have the ability to look at risk globally.


UK Project Construction All Risks and associated covers

US Builders Risk

Global Construction All Risks and associated covers

Mass Timber Construction Insurance

538 Underwriting Team

Simon Challinor


With over 35 years of London market construction experience, Simon led the team in the creation of CUI in 2018. He led the HDI Gerling London Engineering Center up until 2006 when he moved to Canopius where he was Class Underwriter (Construction) until leaving to create 538 Underwriting in 2018.


M: +44 (0) 7501 228 305

Brad Green

Senior Underwriter

Brad started his career at Aon in 1997; with more than 25 years Insurance experience, of which 21 years are of trading UK and International Construction and Engineering business as a Lead Underwriter specifically within the London Market for Lead Insurance Companies. Having held various underwriting and managerial positions at Allianz Global Risks, Chubb Insurance and at Canopius Syndicate where he was part of the Lloyds Construction Consortium. His experience includes trading of all major classes of Construction, Engineering and Plant risks for major international corporate clients. Before joining Chase Underwriting in December 2020 Brad was a Renewable Energy Senior Underwriter at Aviva and Senior Underwriter at Ensurance MGA. Brad is an active representative at the London Engineering Group UK CAR market forum including providing technical support on various committees.


M: +44 (0) 7900 346 182


Assistant Underwriter

Hayley graduated from the University of Reading with a First Degree in Business in 2019. She began her insurance career at Chubb Australia, and then moved onto Chase Global based out of Melbourne. Hayley joined the 538 Underwriting team in February 2022.


M: +44 (0) 7598 878 702


538 Underwriting

75 King William Street
London EC4N 7BE

T: +44 (0)203 929 5507