Winterhawk is not your typical consultancy service.

We have been ‘the customer,’ responsible for delivering enterprise-wide solutions and services; we have managed budgets and presented to executive committees, and that’s what sets us apart. Because our senior leadership can relate to your challenges, Winterhawk offers more than a conventional consulting service. We will work with you and support you through every stage of your project.

Our growing Advisory Board consists of telecom and financial services CEOs, seasoned sales and financial executives, who provide key insights and strategic advice.

Meet the Leads

Steve Hewison

CEO, Managing Director  

As the CEO and owner of Winterhawk, Steve is responsible for all day-to-day operations, resource and management decisions and for developing company strategy. Steve began his career in technology some 32 years ago and has more than 20 years’ senior leadership experience in large blue chip organisations. He has managed SAP Centres of Excellence, Quality Assurance, IT and SAP Security and Governance groups across Financial Services, Consumer Packaged Goods and Media industries. Steve has worked in numerous countries across Europe as well as in North America, and managed multiple large, global SAP Security projects. In addition, he has extensive experience with developing controls, implementing policies and procedures to meet new and evolving regulatory requirements and streamlining business procedures to enhance productivity, and to achieve cost and resource efficiencies.

Andrew Sawyer

Head of Global Operations  

Andrew is a technology leader with twenty years of experience implementing systems and technology transformation programmes. He has a wealth of knowledge and hands-on experience across Data Management, GRC, Security, Business and Process Controls, and has worked in a diverse range of industries including  Consumer Packaged Goods,  Automotive, Energy, Financial Services, Aviation, Retail and Telecommunications. At Winterhawk, Andrew is responsible for all aspects of operational delivery, partner management and quality assurance, across all geographies.


Linda Hewison

Head of Finance  

Linda is responsible for the company’s finances, including financial planning, budget and cost management as well as financial risks and all reporting and accounting. Linda’s career has seen her previously work in technical areas of SAP Security, GRC and then in Audit, Internal and Financial Controls for more than 17 years. Working mainly in the Consumer Packaged Goods, Beverage and Retail sectors, her roles and responsibilities have included running and planning Audits, control design and CCMS, SAP GRC Implementations, Security Design, Redesign, Remediation, including S/4HANA Security migrations, as well as rolling out training and education programmes. Linda has worked in the United States and various European locations, and is fluent in English and Swedish.


Advisory Board

Jan Ziskasen, Winterhawk

Jan Ziskasen

Advisory Board Member

Based between the UK and United States, Jan is a visionary technology executive with over twenty years of experience with large scale systems and technology transformations and operations, managing annual budgets in excess of $150 million. After 8 years in the United States where he was serving as Chief Technology Officer at Kraft Foods Group, Jan has returned to Europe where he assumed the role of Chief Executive Officer at Faroese Telecom. Jan earned his Bachelor’s and Master’s Degrees in Business Administration and Computer Science from the Copenhagen Business School in Denmark.

Lars Andersson

Advisory Board Member

Based in Sweden, Lars is a Venture Capitalist with more than 30 years of experience running businesses in Scandinavia. He studied economics at University, becoming a controller at an international production company, which included responsibility for procurement and HR. He has been a Chief of Finance in both private and public forestry export companies, handling information to the stock market and has served on multiple boards.

Jonathan Mayle

Advisory Board Member

Jon’s career has spanned 4 decades which has included working for major global organisations across electronics, manufacturing and financial services sectors. He’s been the head of SAP Basis, including SAP Security, and has provided insight to senior executives in dealing with situations such as WannaCry ransomware attacks. Jon is currently specialising in ESG Ratings, Frameworks and Financial Market Analysis.

Mike Butcher

Advisory Board Member

Mike has been in the IT industry for 15 years, and is currently an EMEA Professional Services Practice Director at Oracle NetSuite. He started his career as a Graduate Analyst at Accenture, then spent a number of years in the SAP space working on EMEA rollouts at Kraft Foods Group. After joining HCL Axon, supporting the Transport for London account, Mike worked on SAP HCM project deployments in Australia before returning to the UK to continue in SAP Project Management . He has a Law and Economics Degree from the University of Leicester.

Lyndon Gill

Advisory Board Member

Lyndon has been in the investment industry since 1984, he has managed private client portfolios and been involved in fund research, setting up and managing numerous multi-manager funds whilst at Cazenove, Scottish Widows Investment Partnership and abrdn. Most recently he has been personally responsible for managing assets in the region of £1.2bn with an ever-growing focus upon ESG.