Business Unit Leaders

Garret Dixon

Vice President, Alcoa Corporation
President, Bauxite
Perth, Australia

Garret Dixon is Vice President, Alcoa Corporation and President, Alcoa Bauxite responsible for the Corporation’s global bauxite operations.

He was President of Alcoa Mining when the business unit was part of Alcoa Inc.  Prior to this appointment in 2015, Garret headed up the Global Mining Centre of Excellence after joining Alcoa Inc. in 2013.  In this role, Garret led a team focused on Alcoa's bauxite mining operations with a goal of achieving more efficient and effective mining operations.

Garret is an experienced contracting and mining executive. He has more than 35 years’ experience in the civil and mining contracting and resources sectors. Garret previously was the Managing Director & CEO of Australian company, Gindalbie Metals Ltd.  At Gindalbie he led the company through the transition from explorer to a development company and to iron ore producer. The company grew from a market capitalization of $A250 million in 2006 to $A1,250 million in 2011 and was admitted to the S&P ASX 200 Index. This appointment followed positions as Managing Director of a logistics company and 18 years at contract miner HWE Mining where he headed mining operations in Australia and internationally.

Garret completed his bachelor’s degree in civil engineering from the University of Adelaide, South Australia in 1980.  He later earned his master’s in business from the University of Western Australia, Executive MBA program.

Garret and his wife, Blair, live in the city of Perth, Australia

Michael Parker


Vice President, Alcoa Corporation
Chairman and Managing Director, Alcoa of Australia Limited
President Alcoa Alumina and Australia Region

Michael Parker is Vice President, Alcoa Corporation, Chairman and Managing Director of Alcoa of Australia, and President Alcoa Alumina and Australia Region.  

Prior to the separation of Alcoa Inc. into two publicly-traded companies, Michael held the dual leadership roles leading Alcoa of Australia and the alumina refining business.  Michael is responsible for Alcoa’s global alumina refinery portfolio which includes eight refineries in five countries (Australia, Brazil, Spain, Saudi Arabia and the U.S.).  In Australia he represents the company to facilitate growth opportunities and manages key stakeholder relationships.

Since joining Alcoa Inc. in 1994, Michael has held various management positions in Australia and the United States, primarily focused on Alcoa’s upstream operations in alumina and aluminum. From 2010 to 2015 Michael was Director Business Development and Marketing for Alcoa of Australia. He was responsible for sales, marketing, business development and energy strategy for the Australian operations. From January 2015 he was also Vice President Commercial for Alcoa’s global alumina refining business.

For the three years prior to 2010, Michael worked in Knoxville, Tennessee, as Vice President of Alcoa Materials Management.

Michael is Vice President of the Australian Aluminium Council, Director of Alcoa Corporation Foundation, and Executive Sponsor for the Alcoa Women’s Network.  He has previously served as a member of the London Metal Exchange’s Aluminium Committee, was a Director of the Trustee Board for the Alcoa of Australia Retirement Plan and a Director of the Dampier to Bunbury Natural Gas Pipeline.

Michael holds a Bachelor degree in International Business from Griffith University, Queensland.

Timothy D. Reyes

President, Alcoa Aluminum
Knoxville, Tennessee

Tim Reyes is President, Alcoa Aluminum, a newly created business unit comprised of the Company’s aluminum smelting, castings, rolled products and a majority of its energy assets. The consolidated business unit was created in March 2016 to reduce complexity and reduce costs in the company’s operations.

Most recently, Tim was President, Alcoa Cast Products, comprised of 13 global operating locations which create high-value differentiated aluminum products, including rolling slab, extrusion and forging billet, foundry alloys, and wire rod sold to external and internal fabricators.

Since joining former parent company Alcoa Inc. in 1999, Tim has led several commercial functions, including serving as President of Alcoa Materials Management, which oversaw commodity price risk, metal procurement and logistics for the company. Earlier, he served as Director of Alcoa Europe’s metal management group; Senior Vice President of Alcoa Materials Management, responsible for Alcoa’s metal trading activities; and Vice President, Marketing and Sales for Alcoa World Alumina, responsible for various commercial organizations within both Alcoa World Alumina and Alcoa Primary Products, covering smelter and chemical grade aluminas, bauxite, bulk freight and specialty powders.

Earlier in his career, Tim held trading positions with F&S International, a subsidiary of STINNES/VEBA (now EON) and co-founded the Tricor Group, both based in New York City.

Tim currently serves on the Board of the Directors of Purity Zinc Metals, Inc., the Board of Directors and Executive Committee of the Aluminum Association, and is a member of the London Metal Exchange’s Physical Market Committee. In addition, he has previously served as an industry member of the London Metal Exchange’s Aluminum and Warehouse Committees, as well as the Aluminum Association’s Recycling Committee. His nonprofit work included serving on the Board of Directors of the East Tennessee Juvenile Diabetes Research Foundation and the Knoxville Botanical Gardens and Arboretum.

Born in Springfield, Massachusetts, Tim graduated from Boston College with a degree in finance. He and his wife, Andrea, have one son, Evan.