ASC's Executive is responsible for the delivery of our Corporate Strategy which aims to grow the business through continually improving performance on existing programs, developing skills and establishing strategic partnerships that enhance our capacity to win new business.

Stuart Whiley

Chief Executive Officer and Managing Director

BSc (Hons), FIEAust, CPEng, GAICD

Stuart was appointed Managing Director and Chief Executive Officer of ASC Pty Ltd in February 2018, after holding the position of Interim Chief Executive Officer from July 2014.

Stuart has a career with ASC spanning more than 30 years, fulfilling various submarine program, projects, schedule and systems engineering roles within the business. In 2005 he was appointed General Manager, Collins Class Submarines, responsible for the Collins Class support activities in both South Australia and Western Australia.

Prior to emigrating to Australia from the UK in 1988, Stuart held a number of engineering roles at BAE, Admiralty Research Establishment and Dowtys working in a naval/weapons environment.

Paul Gay

Chief Operating Officer

BEng Mech (Hons), MEng (Mgt), FIEAust, CPEng, MAIPM, GAICD

Paul is responsible for overseeing all aspects of ASC's Collins Class related work, including sustainment, Life-of-Type-Extension (LOTE), submariner training, commercial and future planning. 

Paul previously led pre-production within the Hobart Class Air Warfare Destroyer project and, prior to joining ASC, was the platform systems engineering manager for the BAE Systems' Landing Helicopter Dock project in Williamstown, Victoria. 

He has over 15 years’ experience in major naval programs and has also worked as a consulting engineer in the steel, paper and mining industries.  

Martin Edwards

Executive Manager Maritime Services Group

CPEng, FIEAust, BMngt (Mktg), AssDip (Eng)

As Executive Manager Maritime Services Group, Martin is responsible for overseeing the development of ASC’s submarine capability as it relates to the future submarine project and other submarine-related opportunities.

Prior to his current role Martin was Chief Operating Officer of ASC Shipbuilding responsible for operational performance and generating an effective operating environment within the ASC Shipbuilding business unit and the Air Warfare Destroyer (AWD) Project. His primary focus was on project management, production, supply chain, quality and delivery of the Hobart Class AWDs. Martin also served as Shipbuilder Industry Participant representative for ASC on the AWD Alliance and as part of the AWD Executive Leadership Team.

Martin originally spent 19 years with ASC, having joined the company in 1988 as part of the original Collins Class design contingent seconded to Kockums, Sweden.  This was followed by various design, project and business development management roles, including General Manager – ASC Shipbuilding.  Prior to re-joining ASC in 2011, Martin spent five years in the Middle East and Western Australia as a chief operating officer in the construction of oil rigs, onshore gas processing plant, mining site expansions and various fabrication activities.

Ashley Menadue

Chief Financial Officer


As the Chief Financial Officer, appointed in April 2015, Ashley Menadue is responsible for the overall financial strategy and direction of ASC Pty Ltd inclusive of accounting, audit, tax, treasury, corporate finance and shareholder relations.

Ashley provides the Board and Executive with financial oversight of ASC, ensuring compliance with statutory requirements, whilst developing financial strategies and executing the long-term financial success for the ASC Group.

Ashley also maintains a multi-departmental role within ASC, leading Finance as well as the Legal and Risk & Assurance functions.

Prior to his role at ASC, Ashley was the Financial Controller for ASC Shipbuilding (then part of the ASC Group), which saw him work closely with ASC Shipbuilding management to oversee the financial performance of the Air Warfare Destroyer program.

Ashley has held a number of senior-level positions over a career spanning 25 years, these include 16 years working in senior executive and corporate finance roles within BAE Systems Australia and auditing experience within KPMG.

Joanne Horne

Executive Manager People, Culture and WHSE


Joanne is responsible for ASC’s People and Culture functions and strategy across all business areas, and is the senior ASC executive in Western Australia.

Joanne has a wealth of experience in heavy industrial environments and working across geographically diverse locations. She has more than 13 years’ experience in people and culture strategy and operational human resources execution, including five years as General Manager, with Caterpillar dealer, WesTrac.

Prior to joining ASC in 2018, Joanne provided consulting services to a range of businesses including mining company South32.

Mark Stephens

Executive Manager Collins Class Program

BCompSc, MEng

Mark was appointed Executive Manager Collins Class Program in August 2020, responsible for all Collins Class submarine sustainment and maintenance activities in Osborne, South Australia and Henderson, Western Australia. He had previously led Collins Class Operations, supporting over 650 permanent employees across ASC's two sites, since 2012.

Mark has over 30 years’ experience in the defence industry, fulfilling a number of senior roles at ASC since joining the company in 2004, including supply chain manager, commercial manager for submarine through-life-support and as senior project manager for submarine design and engineering.

Mark is a Royal Australian Navy veteran with ten years’ service as a combat system specialist in surface combatants. 

Christian Hamilton

Chief Strategy Officer

MARTS (Strategy and Management), GAICD, CSC(J)

Christian is responsible for executing ASC's new company strategy, addressing in part the full achievement of the Sovereign Shipbuilding Talent Pool. 

Previous to this role, Christian was the Executive Manager Strategy and Communications, responsible for developing ASC’s Corporate Strategy, management of the annual strategic planning process and development of contingency plans to address emergent risks and opportunities.

Christian has also held positions in strategy, HR and organisational development with a focus on development of ASC’s strategic framework and enhancing business performance through organisational design, alignment and accountability.

Prior to joining ASC in 2011, Christian spent 14 years in the Australian Army where he held various command and leadership postings including operational tours of East Timor, Iraq and Afghanistan. 

Rebecca Livesey

Executive Manager Transformation

MA (Oxf.)

Rebecca joined ASC in 2019 and is responsible for leading its Transformation agenda. For over 20 years she has worked in strategy and leadership roles across Australia and the United Kingdom, leading and facilitating transformation in organisations such as WesTrac, MEC Mining, Aurizon, CS Energy, Westpac, E.ON, and RACQ. She specializes in linking leadership, strategy and culture to drive transformation in organizations.

With a MA in Mathematics from Oxford University, Rebecca brings to the table extensive expertise in strategy development, organisational transformation, decision making frameworks, leadership patterns, behaviour profiling, culture change models and facilitation. She has run her own business as well as held executive roles within organisations, and so recognises the need to be agile and lean in approach.

Rebecca is recognised as a thought leader in organisational leadership and culture and is well-regarded as a professional speaker with a passion for people and diversity.

Peter Tromans

Executive Manager - LOTE

BE (Electrical Power), FIEAust, Eng Exec, CPEng

Peter is responsible for supporting the successful execution of the Life-of-Type-Extension (LOTE) Program. 

Previously appointed to Executive Manager Engineering in 2019, Peter was responsible for ASC’s submarine engineering capability across its South Australian and Western Australian operations.

Peter has held senior business development, naval shipbuilding engineering (Air Warfare Destroyer) and program management roles since re-joining ASC in 2008. He initially joined ASC in 1988 in an electrical engineering role at the start of the Collins Class build program.

Peter has also held a number of program management roles on electronic systems projects at BAE Systems Australia.  

Ivan Witt

General Counsel and Company Secretary

Dip Law (LPAB) (SYD) Dip Com Ship (ACS)

Ivan was appointed General Counsel and Company Secretary of ASC in November 2019.  As Company Secretary, he is responsible for the efficient administration of the company and its subsidiaries, particularly in relation to corporate governance, regulatory compliance and for ensuring that decisions of the Board of Directors are implemented.

In his General Counsel role, he is responsible for the provision of strategic legal advice to management and the leadership of the commercial legal team including export controls and workers' compensation.

Prior to joining ASC, Ivan's career has spanned the shipping, transport, logistics, hospitality and resources industries.  Additionally, he is a serving Captain in the Royal Australian Naval Reserves.

Ben Pudney

Executive Manager Supply Chain


Ben was appointed to lead ASC’s Supply Chain in 2015, joining the company as an experienced procurement and supply chain leader with international experience in defence, mining and management consulting.

Ben is responsible for leading ASC’s internal supply chain capability and the management of an external supply chain of more than 1,700 suppliers, supporting ASC’s programs. He is also the  executive sponsor of ASC’s diversity and inclusion program.

Prior to joining ASC, Ben held senior roles with companies including BHP Billiton, Accenture UK and Linfox.

Mark Albertson

Executive Manager Operations & WHSE

GradDip Strategic Leadership, Dip Management

Mark joined ASC as Executive Manager Operations in April 2021, bringing significant experience in operational leadership, health and safety, cultural improvement and delivery in Australia and internationally.

Mark is responsible for the Operations, WHSE, Planning, Facilities and Security teams, including the Collins Class production workforces in South Australia and Western Australia, and is leading several safety initiatives and behavioural safety programs as we mature out WHSE frameworks and action plan. 

Immediately prior to joining ASC, Mark was Director of Asset Management for global resources company Newmont, based in Denver, Colorado, United States.

Mark commenced his career in aviation maintenance engineering with the Royal Australian Navy.

Back to top