The Sumner Group team comprises seasoned professionals from finance, legal and industry sectors.

Lord Chadlington - Chairman

Lord Chadlington’s career spans politics, public relations and journalism. A serial entrepreneur, he founded two of the largest global public relations networks: Shandwick and Huntsworth.

Lord Chadlington has advised various Prime Ministers – including Sir John Major and David Cameron. He was made a member of the House of Lords in 1996.

Most recently he founded his most recent strategic communications firm - The Chadlington Consultancy. He is Chairman and advisor to various international companies.

Lord Chadlington is Life President of the charity Action on Addiction.

David Sumner - Founder & Chief Executive Officer

David is an entrepreneur and long-term investor based in the UAE. He has over 20 years of experience in developing successful global business platforms focusing on the healthcare, security & defence and mining sectors with a specific interest in UK capital markets.

He has been instrumental in seeding, developing and managing the growth of many of the Sumner Group operating businesses and oversaw the public listings of both Sumner Group Mining and SG Recruitment. He founded Sumner Group in 2018 to consolidate and build upon his business interests.

He has served on numerous private and public company boards in both an executive and non-executive capacity and has a track record of raising capital through debt and equity fundraising.

Jonathan Sumner - Chief Financial Officer

Jon brings over 15 years of international experience in financial reporting, forecasting, audit, tax and M&A project management.  During his career to date Jon has held CFO positions with publicly listed companies in the UK, Europe and Asia, where he has a track record of developing businesses and executing capital market transactions.  Prior to this Jon qualified with and held senior positions at PricewaterhouseCoopers and Deloitte.  Jon is a key part of the Company's executive management team that is leading the development of the business.

Jide J. Zeitlin, Non-Executive Director

Mr. Zeitlin spent the first 20 years of his career at The Goldman Sachs Group, Inc., where he held a number of senior management positions including serving as Global Chief Operating Officer of their investment banking businesses. He also served in the firm's Executive Office. Over the next decade, Mr. Zeitlin was a private investor overseeing the Keffi Group Ltd, an investment office that has life science and natural resource interests in the Middle East, the United States, and Africa.


Mr. Zeitlin is a member of a number of corporate and charitable boards, such as Affiliated Managers Group, Inc. (US$800 billion in assets under management) and the Nigeria Sovereign Investment Authority (where he is Chairman). He is Chairman Emeritus of Amherst College and formerly served on the boards of a range of institutions, including Teach for America, Harvard Business School, and the Doris Duke Charitable Foundation.


Mr. Zeitlin holds an A.B. degree in Economics and English from Amherst College and an M.B.A. degree from Harvard University.

Katie Lenko Hiess, Non-Executive Director

Katie joined Sumner Group in 2018. An English qualified solicitor, Katie was previously a founding team member and Head of Legal at A.P. Moller Capital where she supported the successful establishment of a dual regulated alternative investment fund manager. Prior to this she developed a legal and compliance function for the regional head office of a company operating in the marine sector across Africa, the Middle East and Asia.

She began her career with leading international law firms, Clyde & Co LLP and Holman Fenwick Willan LLP in London and Dubai.


Katie holds a BSc in International Management (First Class Hons.) from the University of Manchester Institute of Science & Technology Management School and a Graduate Diploma in Law from BPP Law School, London. She was admitted as a Solicitor of the High Court of England and Wales in 2008.

Aamir Ali Quraishi, Non-Executive Director

Aamir joined Sumner Group in 2018 with more than 20 years of investment banking experience in Europe, Asia and the Middle East. He joined Dresdner Kleinwort Benson in 1996 moving to Libertas Capital Group plc in 2003 where he successfully built its capital markets practice in London, relocating to its Dubai office in late 2007. Immediately prior to joining Sumner Group, Aamir was a Managing Director at Teneo Capital, the New York headquartered advisory and investment banking firm.

During his career, Aamir has completed over US$20bn in M&A and capital market transactions across several industry sectors globally having worked in London, Tokyo and Dubai. Between 2005 and 2010, he was a qualified Nominated Adviser for the purposes of admissions to London's AIM Market and continues to sit on the board of certain public companies.

Aamir began his career at PwC in London where he qualified as a chartered accountant and remains a member of the ICAEW. He graduated in Economics from the University of Cambridge.

Publicly traded portfolio companies
SUMNER GROUP HEALTH 2754 purple cropped.
SGHX logo for website.jpg

Sumner Group Holdings Limited is a private company registered in Jersey under the Companies (Jersey) Law 1991 with Company number 125839 and registered office address at 28 Esplanade, St Helier, Jersey, JE2 3QA.

Copyright © 2020 Sumner Group Holdings Limited