Our Team


Executive Leadership Team

Meet our Board of Directors

Anne Noonan-President and Chief Executive Officer; Director

Anne Noonan

President and Chief Executive Officer; Director

President and Chief Executive Officer; Director

Anne Noonan joined Summit in 2020 after having served as President and Chief Executive Officer of OMNOVA Solutions Inc. (NYSE: OMN), a global producer of emulsion polymers, specialty chemicals, and decorative and functional surfaces, from November 2016 through January 2020. During her tenure, she transformed the company into a high performing specialty solutions provider with 31% revenue and 22.5% EBITDA growth in high value specialty markets. Ms. Noonan joined OMNOVA in September 2014 as President of its Performance Chemicals business segment. Prior to OMNOVA, Ms. Noonan spent 27 years at Chemtura Corporation, a global manufacturer of specialty chemicals. During her tenure with Chemtura, Ms. Noonan held leadership roles across a wide range of disciplines, from strategic marketing to product development and innovation, to mergers and acquisitions and general management. Ms. Noonan serves on the board of CF Industries, a global leader in nitrogen fertilizer manufacturing and distribution. She earned her Bachelor of Science Honors degree in chemistry and her Master of Science in organometallic chemistry from University College Dublin, Ireland.

Brian Harris - Executive Vice President and Chief Financial Officer

Brian Harris

Executive Vice President and Chief Financial Officer

Executive Vice President and Chief Financial Officer

Prior to Summit Materials, Brian was the Executive Vice President and Chief Financial Officer of Bausch + Lomb. Brian also served at Tomkins PLC., the industrial, automotive, building products and engineering manufacturing conglomerate in several key senior management roles as President of its Worldwide Power Transmission business, Senior Vice President of Business Development, and Chief Financial Officer. He was also the former President of Gates Unitta Asia, a Tomkins PLC and Japanese joint venture based in Osaka. He began his career as staff accountant in the Glasgow office of Deloitte & Touche LLP. He earned his Bachelor of Accountancy from Glasgow University and qualified as a Scottish Chartered Accountant.

Karli Anderson - Executive Vice President, Chief Environmental, Social & Governance Officer and Head of Investor Relations

Karli Anderson

Executive Vice President, Chief Environmental, Social & Governance Officer and Head of Investor Relations

Executive Vice President, Chief Environmental, Social & Governance Officer and Head of Investor Relations

Karli Anderson joined Summit Materials in 2019 after having served as Vice President at Royal Gold, Inc. a precious metals stream and royalty company from 2013 to 2018. Prior to that, Ms. Anderson served in senior investor relations roles at Newmont Mining Corporation and Coeur Mining, and was Chair of the Board of the Denver Gold Group for six years. Ms. Anderson currently serves on the Board of Westwater Resources (NASDAQ:WWR), where she is Chair of the Compensation Committee, and a member of the Audit and Environmental, Health and Safety Committees. Ms. Anderson received her MBA in finance from the Wharton School at the University of Pennsylvania and her Bachelor of Science degree from Ohio University. Ms. Anderson is also an NACD governance fellow.

Chris Gaskill - Executive Vice President, Chief Legal Officer and Secretary

Chris Gaskill

Executive Vice President, Chief Legal Officer and Secretary

Executive Vice President, Chief Legal Officer and Secretary

Chris Gaskill joined Summit Materials in 2015 and has served in various roles of increasing responsibility, most recently as Senior Vice President and Deputy General Counsel. Prior to joining Summit Materials, Mr. Gaskill served in senior legal roles at The Western Union Company and Cardinal Health, Inc. He began his career at Simpson Thacher & Bartlett, LLP in New York City. Mr. Gaskill has a Bachelor of Arts in Government and Legal Studies from Bowdoin College and received his Juris Doctor from the University of Virginia School of Law.

Deon MacMillan - Executive Vice President, Chief People Officer and Head of Corporate Communications

Deon MacMillan

Executive Vice President, Chief People Officer and Head of Corporate Communications

Executive Vice President, Chief People Officer and Head of Corporate Communications

Deon MacMillan joined Summit Materials in March of 2021 after serving as the Chief Human Resource and Communications Officer for Ardent Mills, a leading flour and grain supplier, from 2014 to March 2021. At Ardent Mills, Ms. MacMillan was responsible for the organization and design of the human resource function and the external and internal communication strategies for the company. From 2012 through 2014, Ms. MacMillan consulted on a wide range of HR-related matters with publicly traded multi-national corporations through her consulting firm, MacMillan Consulting. From 2013 to 2015, Ms. MacMillan served as an Associate Consultant at Lominger (Korn Ferry) and was the Vice President Human Resources, Customer Sales, and Experience at Thomson Reuters from 2010 to 2012. Prior to Thompson Reuters, Ms. MacMillan held various positions across multiple organizations and with increasing levels of responsibilities, focused on Human Resources, communications, and general change management. Ms. MacMillan received her Bachelor of Arts in Business Administration with an Emphasis in Human Resources and her MBA from the University of Alaska.