Mr Robinson has served as an Alternate Director for a number of HOCHTIEF-nominated directors dating back to November 2013. Mr Robinson is partner of ESV Accounting and Business Advisors. He is also principal of Harveys Consulting. Mr Robinson is a Director of Catholic Schools NSW Limited. Mr Robinson is a Director of HOCHTIEF Australia and was a former Director of Leighton Properties from May 2000 to August 2012. He was a Trustee of Mary Aikenhead Ministries, the responsible entity for the health, aged care and education works of the Sisters of Charity in Australia. He is Member of the Ethics, Compliance and Sustainability Committee.

Mr Chenu is an experienced corporate and finance professional who previously held senior finance and management positions with a number of ASX-listed companies. In a number of these senior roles, he was engaged in strategic business planning and business change, including several turnarounds, new market expansions and management leadership initiatives. Mr Chenu was CFO of James Hardie Industries plc from 2004 to 2013. As CFO, he was responsible for accounting, treasury, taxation, corporate finance, information technology and systems, and procurement. Mr Chenu is a former Director of James Hardie Industries plc (August 2014 to November 2020). He is Chairman of Risk Committee and Member of Ethics, Compliance and Sustainability Committee.

Ms Spargo has commercial experience, both in advisory roles (having worked in legal practice in the public and private sectors), and as a director of listed and unlisted companies. She is also a director of the Geelong Football Club, Coinvest Ltd and Future Fuels Cooperative Research Centre. Ms Spargo's previous Board positions included Chairman of UGL, as well as directorships at Fulton Hogan, SMEC Holdings, Fletcher Building (March 2012 to September 2017), Xenith IP Ltd (April 2017 to August 2019), Pacific Hydro, Suncorp Portfolio Services, IOOF, Investec Bank, and Transfield Services Infrastructure Fund. She is Chairman of the Ethics, Compliance and Sustainability Committee and Member of the Risk Committee.

Mr Seidler has served as an Alternate Director for a number of HOCHTIEF-nominated directors dating back to November 2003. Mr Seidler AM had over 40 years' experience as a lawyer, non-executive director on listed and unlisted companies in industries such as funds management, banking, investment banking, hotel management as well as serving on government committees in both Australia and Japan. Mr Seidler is the Chairman of the Australian Olympic Committee Tokyo 2021 Advisory Committee, Vice President of the Australia-Japan Business Cooperation Committee, Senior Regional Executive, APAC Regional Office (Australia) for Hitachi Ltd, Principal of the Kokusai Business Advisory and is a member of the Business Council of Australia and Asia Society's "Asia Taskforce". Mr Seidler has also been made a member of the Order of the Rising Sun by the Emperor of Japan. Mr Seidler AM was appointed as a Director of HOCHTIEF Australia in November 2011. From 2016 to 2019 Mr Seidler AM was the NSW Government's Special Envoy - Japan. He was a Director of Investa Office Fund Management (from July 2016 to December 2018) and Investa Listed Funds Management Limited (from April 2016 to December 2018). He was the Chairman of Leighton Asia (from November 2011 to September 2012) and a Director of Leighton Properties (from May 2010 to August 2012) and Leighton International (from November 2009 to November 2011).

Mr Santamaria held roles as the Managing Director of UGL (CIMIC Group's services business) and Executive General Manager of Public Private Partnerships and Construction West at CPB Contractors. He was Chief Executive Officer of Iridium (an ACS Group Company) between 2014 and 2015, and he was Chief Executive Officer and Chief Operating Officer of ACS Infrastructure North America and Canada between 2006 and 2013. Mr Santamaria has international experience in the delivery of construction, services and PPP projects and has been responsible for projects and businesses in Australia, Europe, North America, Latin America and South Africa.

Mr Sassenfeld was appointed as the CFO of HOCHTIEF AG in November 2011 and is also the CFO of HOCHTIEF Solutions AG. Mr Sassenfeld is a Director of HOCHTIEF Australia, The Turner Corporation and Flatiron Holding Inc. Mr Sassenfeld has previously worked as the CFO of Ferrostaal AG and Krauss Maffei AG and in senior finance roles at Bayer AG and the Mannesmann Group. He was a director of Abertis Infraestructuras, S.A. he is Member of Risk Committee.

Mr Lopez Jimenez has held the following positions: General Director of Ports for the Ministry of Public Works (Spain), Secretary of State of Urban Affairs and Public Works (Spain), Board Member of Instituto Nacional de Industria (State owned holding company), Manager of the Thermal Plant Constructions in Hidroelectrica Espanola, CEO of Empresarios Agrupados (thermal and nuclear plants engineering and construction management), Chairman and CEO of Endesa S.A., Board Member of Union Electrica S.A. and Empresa Nacional Hidroelectrica de la Ribagorcana, Chairman of Union Fenosa S.A., Vice Chairman of Indra Sistemas S.A., Board Member of CESPA, Board Member of ENCE S.A., Board Member of Keller Group plc, and Chairman of Gtceisu Construccion S.A. Additionally, he was the founder of CEOE (Confederation of Spanish Industries), and Member of its first Executive Committee, founder and first Chairman of FEIE (Federation of Spanish Utility Companies), Board Member of Club Espanol de Energia (Spanish Energy Association) and Board Member of the Alcala University. Mr Lopez Jimenez is currently a Board Member of ACS Group, Member of the Nomination Committee, Member of the Audit Committee and and Vice Chairman of its Executive Committee, Vice Chairman of Dragados S.A., Chairman of ACS Services y Concesiones S.A. and Vice Chairman of ACS Servicios Communicaniones y Energia S.A.; Chair of the Supervisory Board of HOCHTIEF AG, and Board Member of Abertis and Chairman of its Audit and Control. He is also Vice Chairman of the Royal Board of the National Library of Spain and Board Member of the Malaga Picasso Musuem. He is currently the 1st Vice Chairman of the European Club Association (E.C.A) and Vice Chairman of the Real Madrid Football Club. He is Member of the Ethics, Compliance and Sustainability Committee.

Mr del Valle Perez since 1974, has been Abogado del Estado de Espana (State Attorney of Spain). He has been a Member of the Bar Association of Madrid since 1976. As Spanish State Attorney he performed his duties in the Delegations of the Ministry of Finance and the Courts of Justice of Burgos and of Toledo, and in the Legal Departments of the Ministry of Health and of the Ministry of Labour and Social Security. Mr del Valle Perez was previously a Director of the legal department of the political party UCD (from 1977 to 1981) and a Member of the Parliament (Congreso de los Diputados) of Spain (from 1979 to 1982). He was also Deputy Minister for Territorial Administration from 1981 to 1982. Since 1983 Mr del Valle Perez has been a Director of and/or legal advisor to many Spanish companies, including Banesto (merged with Banco Santander), Continental Industrias del Caucho (a subsidiary of Continental AG), Fococafe and Continental Hispanica (a subsidiary of Continental Grain Inc). Mr del Valle Perez is a member and Board Secretary of ACS Group and a number of its subsidiaries, is a Director and Board Secretary of Dragados, S.A., of ACE Servicios, Comunicaciones y Energia S.A., of Cobra Gestion de Infraestructuras, S.A. and of ACS Servicios y Concesiones S.A.and is currently a member of the Supervisory Board of HOCHTIEF AG. He is Member of the Ethics, Compliance and Sustainability Committee.

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