Ronald J. Mittelstaedt has been President and Chief Executive Officer of Waste Connections since April 2023. ​ From July 2019 to that date, Mr. Mittelstaedt served as Executive Chairman of Waste Connections. ​From its formation in 1997 to July 2019, Mr. Mittelstaedt served as Chief Executive Officer of Waste Connections. ​Mr. Mittelstaedt has served as a director of Waste Connections since its formation and serves on the Executive Committee. Mr. Mittelstaedt was elected Chairman in January 1998 and served in that capacity until stepping down to serve as President and Chief Executive Officer in April 2023. ​He also served as President of Waste Connections from its formation through August 2004. Mr. Mittelstaedt has more than 30 years of experience in the solid waste industry. He serves as a director of SkyWest, Inc. Mr. Mittelstaedt holds a B.A. degree in Business Economics with a finance emphasis from the University of California at Santa Barbara.

Darrell W. Chambliss has been Executive Vice President and Chief Operating Officer of Waste Connections since October 2003. From October 1, 1997, to that date, Mr. Chambliss served as Executive Vice President – Operations of Waste Connections. Mr. Chambliss has more than 30 years of experience in the solid waste industry. Mr. Chambliss holds a B.S. degree in Business Administration from the University of Arkansas.

James M. Little has been Executive Vice President – Engineering and Disposal of Waste Connections since July 2019. From February 2009 to that date, he served as Senior Vice President – Engineering and Disposal of Waste Connections. Mr. Little served as Vice President – Engineering of Waste Connections from September 1999 to February 2009. Mr. Little held various management positions with Waste Management, Inc. (formerly USA Waste Services, Inc., which acquired Waste Management, Inc. and Chambers Development Co. Inc.) from April 1990 to September 1999, including Regional Environmental Manager and Regional Landfill Manager, and most recently Division Manager in Ohio, where he was responsible for the operations of ten operating companies in the Northern Ohio area. Mr. Little is a certified professional geologist and holds a B.S. degree in Geology from Slippery Rock University.

Patrick J. Shea has been Executive Vice President, General Counsel and Secretary of Waste Connections since July 2019. From August 2014 to that date, he served as Senior Vice President, General Counsel and Secretary of Waste Connections. Mr. Shea served as Vice President, General Counsel and Secretary of Waste Connections from February 2009 to August 2014. He served as General Counsel and Secretary of Waste Connections from February 2008 to February 2009 and Corporate Counsel of Waste Connections from February 2004 to February 2008. Mr. Shea practiced corporate and securities law with Brobeck, Phleger & Harrison LLP in San Francisco from 1999 to 2003 and Winthrop, Stimson, Putnam & Roberts (now Pillsbury Winthrop Shaw Pittman LLP) in New York and London from 1995 to 1999. Mr. Shea holds a B.S. degree in Managerial Economics from the University of California at Davis and a J.D. degree from Cornell University.

Mary Anne Whitney has been Executive Vice President and Chief Financial Officer since February 2021. From July 2018 to that date, Ms. Whitney served as Senior Vice President and Chief Financial Officer of Waste Connections. From February 2018 to July 2018, Ms. Whitney served as Senior Vice President - Finance of Waste Connections. From March 2012 to February 2018, Ms. Whitney served as Vice President - Finance of Waste Connections. From November 2006 to March 2012, Ms. Whitney served as Director of Finance of Waste Connections. Ms. Whitney held various finance positions for Wheelabrator Technologies from 1990 to 2001. Ms. Whitney holds a B.A. degree in Economics from Georgetown University and an M.B.A. in Finance from New York University Stern School of Business.

Matthew S. Black has been Senior Vice President – Chief Accounting Officer of Waste Connections since February 2023. ​ From January 2017 to that date, Mr. Black served as Senior Vice President and Chief Tax Officer of Waste Connections. ​From March 2012 to January 2017, Mr. Black served as Vice President and Chief Tax Officer of Waste Connections. ​From December 2006 to March 2012, Mr. Black served as Executive Director of Taxes of Waste Connections. ​ Mr. Black served as Tax Director for The McClatchy Company from April 2001 to November 2006, and served as Tax Manager from December 2000 to March 2001. ​From January 1994 to November 2000, Mr. Black held various positions, including Tax Manager, for PricewaterhouseCoopers LLP. ​ Mr. Black is a Certified Public Accountant and holds a B.S. degree in Accounting and Master’s degree in Taxation from California State University, Sacramento.

Robert M. Cloninger has been Senior Vice President, Deputy General Counsel and Assistant Secretary of Waste Connections since February 2022. From August 2014 to February 2022, Mr. Cloninger served as Vice President, Deputy General Counsel and Assistant Secretary of Waste Connections. From February 2013 to August 2014, Mr. Cloninger served as Deputy General Counsel of Waste Connections. From February 2008 to February 2013, Mr. Cloninger served as Corporate Counsel of Waste Connections. Mr. Cloninger practiced corporate, securities and mergers and acquisitions law with Schiff Hardin LLP in Chicago from 1999 to 2004 and Downey Brand LLP in Sacramento from 2004 to 2008. Mr. Cloninger holds a B.A. degree in History from Northwestern University and a J.D. degree from the University of California at Davis.

David G. Eddie has been Senior Vice President – Performance Optimization since February 2023. ​ From January 2011 to that date, Mr. Eddie has served as Senior Vice President and Chief Accounting Officer of Waste Connections. ​From February 2010 to January 2011, Mr. Eddie served as Vice President – Chief Accounting Officer of Waste Connections. ​ From March 2004 to February 2010, Mr. Eddie served as Vice President – Corporate Controller of Waste Connections. ​ From April 2003 to February 2004, Mr. Eddie served as Vice President – Public Reporting and Compliance of Waste Connections. ​From May 2001 to March 2003, Mr. Eddie served as Director of Finance of Waste Connections. ​ Mr. Eddie served as Corporate Controller for International Fibercom, Inc. from April 2000 to May 2001. ​From September 1999 to April 2000, Mr. Eddie served as Waste Connections’ Manager of Financial Reporting. ​From September 1994 to September 1999, Mr. Eddie held various positions, including Audit Manager, for PricewaterhouseCoopers LLP. ​ Mr. Eddie holds a B.S. degree in Accounting from California State University, Sacramento.

Eric O. Hansen has been Senior Vice President – Chief Information Officer of Waste Connections since February 1, 2019. From July 2004 to that date, Mr. Hansen served as Vice President – Chief Information Officer of Waste Connections. From January 2001 to July 2004, Mr. Hansen served as Vice President – Information Technology of Waste Connections. From April 1998 to December 2000, Mr. Hansen served as Director of Management Information Systems of Waste Connections. Mr. Hansen holds a B.S. degree from Portland State University.

Susan R. Netherton has been Senior Vice President – People, Training and Development of Waste Connections since February 2022. From July 2013 to February 2022, Ms. Netherton served as Vice President – People, Training and Development of Waste Connections. From February 2007 to July 2013, Ms. Netherton served as Director of Human Resources and Employment Manager of Waste Connections. From 1994 to 2007, Ms. Netherton held various human resources positions at Carpenter Technology Corporation, a publicly-traded, specialty metals and materials company. Ms. Netherton holds a B.S. in Elementary Education from Kutztown University and an M.B.A. from St. Mary’s College of California.

Rob Nielsen has been Senior Vice President – Operations of Waste Connections since July 2023. ​ From April 2002 to that date, Mr. Nielsen served as a Region Vice President of Waste Connections, including for its Southern, Western and Eastern Regions. ​From May 1999 to April 2002, Mr. Nielsen served as a District Manager of Waste Connections. ​Prior to joining Waste Connections in May 1999, Mr. Nielsen worked for Browning Ferris Industries as an Area Vice President of Recycling. Mr. Nielsen holds B.S. degree in Agriculture from University of Maine.

Dan Pio has been Senior Vice President – Operations of Waste Connections since July 2023. From June 2016 to that date, Mr. Pio served as a President of Waste Connections of Canada. From January 2016 to June 2016, Mr. Pio served as Chief Executive Officer and Chief Integration Officer of Progressive Waste Solutions Ltd. prior to its merger with Waste Connections. From October 2013 to January 2016, Mr. Pio served as Executive Vice President, Strategy and Business Development for Progressive Waste Solutions Ltd. From March 2010 to October 2013, Mr. Pio served as Vice President and Chief Operating Officer of BFI Canada. From January 2001 to October 2005, Mr. Pio served as Senior Vice President with Waste Management, Inc. and President of Waste Management of Canada. During his 35-year career in the solid waste industry, Mr. Pio also held senior level positions at USA Waste Services and Laidlaw Waste Systems. Mr. Pio holds a B.A. Economics degree from McMaster University.

Phil Rivard has been Senior Vice President – Business Development of Waste Connections since July 2023. ​ From April 2022 to that date, Mr. Rivard served as Executive Director and Head of M&A of Waste Connections. ​ From July 2001 to March 2022, Mr. Rivard served as a Regional Vice President of Waste Connections. From August 1999 to June 2001, Mr. Rivard served as a Divisional Vice President of Waste Connections. ​ From October 1997 to July 1999, Mr. Rivard served as a Business Development Manager of Waste Connections. ​ From July 1988 to September 1997, Mr. Rivard held various positions with USA Waste Services Inc., Sanifill, Inc. and Browning-Ferris Industries. Mr. Rivard worked as an external auditor at Touche Ross & Co. from June 1986 to June 1988. ​ Mr. Rivard holds a B.S. degree in Accounting from Metropolitan State University of Denver.