Sharon Jackson

Phone: +44 (0)20 3889 8138

Head of Operations


Sharon joined Blenheim October 2019 as Head of Operations. Sharon has over 30-years experience in the London market.
Prior to joining Blenheim, Sharon held various roles at Aon from 1987, most latterly as Head
of Operations Global Re Specialty 2012 -2019.


Jon Poole

Phone: +44 (0)20 3889 8141


Jon joined Blenheim in 2017 as Syndicate Actuary. Prior to this he was Vice President and Syndicate Actuary at Ariel Syndicate 1910. He had also held similar roles at Montpelier Re and Catlin. Jon holds a Master’s Degree in Mathematics and Statistics and is a Fellow of the Institute of Actuaries in the UK.

Quan Tran

Phone: +44 (0)20 3889 8143

Actuarial Analyst

Rukmini Basu

Phone: +44 (0)20 3889 8142

Actuarial Analyst


Grant Williams

Phone: +44 (0)20 3889 8109

Head of Claims

Grant joined Blenheim in 2016 as Head of Claims. His earlier claims career was spent at Municipal Mutual and GAB Robins where he left as Technical Claims Manager in 2000 to join Catlin Syndicate as Head of Property Claims. He joined Cathedral in 2005, initially as D&F Claims Manager, rising to Head of Claims for Cathedral Syndicates 2010 and 3010.He is an Associate of the Chartered Insurance Institute, Chartered Insurance Practitioner and Associate of the Institute of Arbitrators.

Hugh Spencer

Phone: +44 (0)20 3889 8108

Claims Manager

Derek Grainger

Phone: +44 (0)20 3889 8087

Compliance Director

Derek joined Blenheim in 2017 as Compliance Director. He has worked in the Lloyd’s Insurance Market since 1969, spending his first fifteen years with the Corporation of Lloyd’s, in various managerial roles in membership and regulatory departments. Since 1986 he has held various executive directorships in both Lloyds’ Members and Managing Agencies including being compliance director of Cathedral Underwriting Ltd from 2000 – 2017. He served as a member of the LMA’s Regulatory Committee from 2002-2011.

Tessa Mijatovic

Phone: +44 (0)20 3889 8086

Company Secretary & Compliance

Tessa, who holds a Master’s degree in Law from Kings College London, started her compliance career at Lloyd’s in 2010 at Cathedral Underwriting Limited before moving to head up the Regulatory Affairs team at MS Amlin in 2012. She joined Blenheim in 2017 as Company Secretary to Blenheim and its holding company White Bear Capital Limited and also as Compliance Manager to Blenheim.

Binti Shah

Phone: +44 (0)20 3889 8089

Senior Compliance Analyst

Joanna Pearce

Phone: +44 (0)20 3889 8106

Assistant Compliance Manager

Delegated Underwriting

Siobhan Batchelor

Phone: +44 (0)20 3889 8102

Delegated Underwriting Authority Manager

Siobhan joined Blenheim in 2017 as the Delegated Underwriting Authority Manager. She was previously employed at Cathedral, joining in 2003 as D&F Underwriting Assistant, until focusing solely on delegated underwriting, becoming Delegated Underwriting Authority Manager for both Syndicates 2010 and 3010.

Matthew Adams

Phone: +44 (0)20 3889 8104

DUA Assistant

Exposure Management

James Simpson

Phone: +44 (0)20 3889 8130

Head of Exposure Management

James joined Blenheim in 2016. Prior to this he had ten years’ experience at Cathedral in catastrophe modelling and exposure management, rising to the position of Syndicate Exposure Manager, and two years at AIR-Worldwide, as a Client Services Associate. A geology graduate, he also has a MSc in Geophysical Hazards from University College London.

Miles Brown

Phone: +44 (0)20 3889 8134

Exposure Management Analyst

Philip Hammick

Phone: +44 (0)20 3889 8133

Senior Exposure Management Analyst

Emily Horsnell

Phone: +44 (0)20 3889 8136

Senior Exposure Management Analyst

Judith McFarlane

Phone: +44 (0)20 3889 8135

Exposure Management Analyst

Laura Phillips

Phone: +44 (0)20 3889 8132

Exposure Management Analyst


Sharon Ingham

Phone: +44 (0)20 3889 8120

Finance Director

Jay Bailey

Phone: +44 (0)20 3889 8121

Syndicate Accountant

Marianne Mahendra

Phone: +44 (0)20 3889 8123

Management / Financial Accountant

Emily Harford

Phone: +44 (0)20 3889 8122

Finance Assistant

Human Resources

Joanne Perry-Spinks

Phone: +44 (0)20 3889 8084

Human Resources Manager

Joanne joined Blenheim in December 2019, from Masthaven Bank. Joanne gained her Chartered MCIPD from the University of Greenwich in 1993
and went on to gain a Master’s degree in Human Resource Management from the University of Westminster in 2002, whilst working at Govett Investment Management Ltd.
Joanne has over twenty years’ experience working as a HR Generalist predominantly in Financial Services.


Systems and Reporting

Alan Adebowale

Phone: +44 (0)20 3889 8127

IT Business Analyst

Michael Oseni

Phone: +44 (0)20 3889 8098

IT Business Analyst

Colin Williams

Phone: +44 (0)20 3889 8126

IT Business Analyst

Christine Wood

Phone: +44 (0)20 3889 8128

IT Business Analyst

Simon Mason

Phone: +44 (0)20 3889 8129

IT Business Analyst

Systems and Development

Vikram Singh

Phone: +44 (0)20 3889 8129

IT Business Analyst


Lee Bhagat

Phone: +44 (0)20 3889 8152

IT Operations Manager

Daniel Rosa

Phone: +44 (0)20 3889 8153

IT Operations Technician

Office Support

Rebecca Cresswell

Phone: +44 (0)20 3889 8085

Office Admin Assistant

Dawn Clapham

Phone: +44 (0)20 3889 8080



Maria Tyrrell

Phone: +44 (0)20 3889 8144

Outward Reinsurance Manager

Maria joined Blenheim in 2017 as Outwards Reinsurance Manager. She started her insurance career in 1985 at Faraday Syndicate 435 as an Underwriting Assistant before becoming Outwards Reinsurance Manager. She then spent thirteen years at BMS Group as Broker & Corporate Support and some five years at Willis Re in a similar role.

Megan Hatch

Phone: +44 (0)20 3889 8139

Reinsurance Technician


Risk Management

Stephen Gentili

Phone: +44 (0)20 3889 8131

Chief Risk Officer

Steve joined Blenheim in 2017 as Chief Risk Officer. Steve started his career in Lloyd’s in 1995 joining DPMann/Faraday and initially underwriting Specie and Fine Art before transferring to the loss modelling team in 2001. He subsequently joined Ascot in 2002 where he headed the Aggregation and Modelling team prior to joining Cathedral in 2003. He headed the Cathedral exposure management team from then until 2016. Steve holds a BA(Hons) degree in Business and is ACII qualified.

Kathleen Kilmurray

Phone: +44 (0)20 3889 8137

Risk Analyst