About UsLeadership Team

The Sime Motors NZ Senior Leadership Team is made up of the organisation’s operational and functional heads. With a wide range of complementary experience and skills, the team works together to lead the development of both the New Zealand businesses and their employees.

Patrick McKenna

Managing Director Nz – Director Commercial Vehicles Asia Pacific

Pat joined Sime Motors NZ in 2006 to establish the New Zealand Motor Group Head Office. Immediately prior, Pat spent eight years as Managing Director in the Asia Pacific region for multinational corporate Ingersoll Rand. Pat started his career as a management trainee with the largest General Motors dealer in the central North Island. He has qualifications across the industry, from automotive engineering to management and is experienced handling the strategic mergers and acquisitions that secure future growth of the Group. Pat is married with three adult children and enjoys classic cars and boating.

Steve Riddell

General Manager – Finance

During his 30-year career in finance, Steve has held senior roles in a number of blue-chip multi-nationals operating across Australia’s resources and construction sectors. Most recently Steve was GM Commercial Finance for Hastings Deering, the leading Cat dealership globally, where his broad responsibilities included month-end reporting, budgeting for mergers and acquisitions, and strategic finance projects. Steve is married with four children and is a keen fisherman and snowboarder.

Margo Thomas

Head of People Experience – NZ

Margo joined Sime Motors in August 2025. Prior to this, she was the Global General Manager of People and Capability at a leading New Zealand technology and manufacturing organisation. With over 20 years of experience in the people and culture space, she has held senior HR roles across a diverse range of industries including professional services, education, telecommunications, banking, and distribution. Outside of work, her weekends are filled with cheering on her children at sports games, hunting for the latest sneaker drops, and occasionally hitting the trails on a mountain bike or heading to the slopes for a ski with her family.

Michael Doeg

General Manager – Commercial Sales

Michael has held a series of leadership roles, predominately in the automotive sector, over the past 30 years. He joined Sime Motors NZ in 2016 and has since led both the Passenger and Commercial sides of the business, embracing a collaborative approach to bring out the best in people. Michael previously played and coached ice hockey up to national level and now enjoys riding his jet-ski and driving his ‘Sunday car’. He is married with four children.

Dave Butler

General Manager – Commercial Aftersales

Dave has more than 20 years’ experience leading New Zealand transport and supply chain operations. An accomplished general manager, Dave thrives on the challenge of guiding teams through complex projects. He joined Sime Motors NZ in 2020 as General Manager of TWL and Transpecs prior to moving into his current role. Guided by his partner, Dave has become an enthusiastic fan of Korean cuisine. He is a passionate Blues supporter who enjoys playing tennis and golf to unwind.

David Sutton

General Manager – Retail Sales

David has spent over 25 years working for world-class brands like Porsche and Audi in the UK and New Zealand. He joined Continental Cars in 2009, and his focus on driving a culture of excellence extended across all Sime Motors NZ retail brands when he moved to his current role in 2022. David is married with two teenage children. He enjoys spending time on the golf course as well as watching his children play a range of sports.

Rebecca Grant

Head Of Strategy & Innovation

Rebecca is a strategist with 25 years’ experience in strategic planning, business improvement, innovation, and mergers and acquisitions. She forged a career in management consulting working in Australia, the US, and Asia before moving into industry, working for Agriquality and Boral. Most recently, she spent ten years in a variety of strategic roles with Fonterra, New Zealand’s largest corporate. Married with a young son, Rebecca enjoys spending time at the gym, gardening, reading, and travelling.

Andrew Brown

Head Of Property

Andrew has over 30 years of experience gained across property markets in New Zealand, United Kingdom, U.S.A and Southeast Asia. His background and expertise include valuation, consultancy, commercial sales, leasing, and development. As Head of Property, Andrew is focused on optimising the property function of leased and owned assets of Sime Motors throughout New Zealand. Married with four children, Andrew enjoys overseas travel, a broad range of outdoors activities, and is a keen supporter of the Crusaders and All Blacks.

Charie Ngauv

Executive Assistant to Patrick McKenna | Travel Manager

Charie has been working closely with the Sime Motors NZ senior leadership team for the past six years. With particular focus on supporting Pat McKenna, Charie leverages the experience she’s gained over twenty years of supporting senior leaders at a wide range of organisations including Clear Communications and Skycity Entertainment Group. Charie spends her leisure time enjoying food, family, and travel. She is married and loves spending time with her two young nephews.