Who we are

Our Senior Team

A diverse and experienced team, equipped to deliver a common vision.
Warren Kwei
Founder & Senior Managing Partner
As the Senior Managing Partner, Warren counsels executives on strategy, operations and technology.

In addition to ensuring clients receive the greatest value from their change capital, his remit includes the management of ESHER’s partner eco-system, including venture funds, private equity and technology providers.

Warren is primarily accountable for delivering ESHER’s vision.
Keith McMahon
As a Partner, Keith ensures our Blue Chip client outcomes are achieved and that ESHER delivers value through the provision of our Consultants.

In addition to his remit of managing our financial services & banking portfolios, he also has responsibility for evolving and adapting the way in which we support our customers.

Keith is primarily accountable for client services and managing the development of ESHER’s people.
Julian Thornley
As a Partner, Julian ensures our SME client outcomes are delivered and that our digital capabilities ensure we remain a pioneer in technology advisory and delivery.

In addition to his remit for delivering strategic or complex products and projects, Julian manages our HR/HR tech & regulatory portfolios.

Julian is primarily accountable for ESHER’s intellectual property and for managing governance & operations.
Kate Kennedy
Strategic Advisor
Kate provides strategy and commercial support to the business, inclusive of M&A advisory and iterative development of ESHERs 3 year plan.

Kate has held P&L and Digital related Executive Committee positions in numerous organisations, prior to which she was a Strategy Consultant at BAIN.

Sector specialists

Alistair Bennett
Client Delivery Director (Fintech & Payments)
Paula Ellison
Client Delivery Director (Financial Crime & Transformation)
Nick Harkin
Senior Consultant (Regulatory & Venture Funds)
Joel Attwood
Senior Consultant (ERP & Finance Change)
Tereza Fairbairn
Consultant (PMO & Policies)
Razwan Sajid
Senior Consultant (PMO, Fintech & Change)
Matthew Aldridge
Portfolio/Programme Management
Mitul Thobhani
Digital Lead/Payments & Fintech
Tim Clarke
AWS Cloud Architect
Ross Allen
Systems Architect
Robert O’Boyle
Test Strategy and Execution
Kevin Pratt
Programme Management
Sheila Farrell
Learning, Development & Training
Maya Ravindran
Chief of Staff/Senior Analyst
Nermin Deomic
ERP / SAP Consultant
Jon Kennaugh
ERP / SAP Consultant
Mark Taylor
Programme Management / Payments
Tom McGrath
Project Management
Sumeet Sirnani
SAP FI Consultant
Lana Bonser
Financial Crime / Project Management
Daniel Mermelstein
AWS Cloud Consultant
Noel Stubbs
Senior Data Specialist / Advisor
Kalpana Shah
Consultant, Workday / Project Management

Interested in joining us?


Our history

We started out in 2012 with a single purpose: to manage the change that matters most. Since then, we’ve designed, developed and implemented projects for a huge range of clients all over the world. Based in Soho, London, we operate internationally.
AUG 2012
Esher Advisory founded by Warren Kwei
SEP 2012
1st International Energy and Utilities client
SEP 2013
1st Global Retail client
JAN 2014
1st Financial Services client
JUL 2014
ESHER employs its 10th Consultant
MAY 2015
1st Venture fund engages ESHER to support large investment into Digital Bank Start-Up
MAR 2016
ESHER mobilise 1st dual track IPO/Trade-Sale project for £1b Market Cap FS business
FEB 2017
1st International Food Distribution client
APR 2017
ESHER move base to new premium office in Soho, London
JUL 2017
ESHER employs its 40th Consultant
DEC 2017
ESHER delivers record year on year revenue growth of 86.3%
JUL 2018
ESHER engaged by world's pre-eminent card/payments business under Global PSL/MSA
NOV 2018
ESHER appoints multiple new senior Consultants
FEB 2019
PE backed regulated Fintech appoints ESHER
MAY 2019
1st on-line fashion retail client
JUL 2019
ESHER launches new brand and 3 year strategic plan
Aug 2019
One of the Worlds largest pension funds appoints Esher to design Change Management framework for UK based Portfolio company
Oct 2019
French based PE firm appoints ESHER to deliver complex use-case/customer journey work package for UK/US based Payments business
Nov 2019
ESHER win honours for innovation in the field of Platform/Project at the UK Awards International event in London
Dec 2019
ESHER Founder and Senior Managing Partner awarded one of the UKs top 100 CEO’s by CEO Today magazine
Feb 2020
Japan based mobility conglomerate appoints ESHER to support one of its European group Co’s with innovative technology that improves the customer journey