WCA Team Bios

Meet the Team


Matt Spencer

Chief Operating Officer

  • Matt is the Chief Operating Officer (COO) of WCA and he provides leadership to safety, collection operations, sales and marketing, landfill operations, and fleet and procurement activities of the company
  • Matt has over ten years of management experience in the solid waste management industry where he has successfully implemented and supervised performance programs that deliver outstanding operational results and superior customer service.
  • Prior to joining WCA, he served as General Manager of Landfill and Hauling Operations for Republic Services, where he was responsible for profit and loss as well as all departments within the business unit. 
  • He has served in multiple roles for Waste Management, including Senior District Manager, Area Safety Manager, and Route Manager.
  • Matt holds a Bachelor’s Degree in Journalism and Mass Communication from the University of South Carolina.  


Dianna Cervantes

Chief Financial Officer

  • Dianna Cervantes is the Chief Financial Officer for WCA and provides leadership for the accounting, financial planning, treasury and risk management operations of our company.
  • Dianna has more than 16 years of financial leadership experience, including over ten years in the waste industry, where she has served as a business partner to operational leaders and led teams responsible for accounting, budgeting, financial reporting, performance analysis, and capital investment management.
  • Prior to joining WCA, Dianna served as Vice President and Chief Accounting Officer with Rockwater Energy Solutions in Houston, Texas, where she led more than 40 accountants, managed the external audit and proved to be a leader who was skilled at identifying and executing upon SG&A cost reduction opportunities.
  • She is a Certified Public Accountant, and holds a Bachelor’s degree in Business Administration from the University of Hawaii.


Michael Roy

Senior Vice President and General Counsel

  • Mike is the Senior Vice President – General Counsel of WCA, a position he has held since joining WCA in December 2007. In such capacity, he has primary responsibility over all of WCA legal affairs and leads the Human Resources/Benefits/Risk Management department.
  • Mike also serves as Secretary of WCA and Vice President and Secretary of WCA’s subsidiaries.
  • Mike was formerly Senior Vice President, General Counsel and Secretary of Sterling Bank and Charter Bank, Houston-based public bank holding companies.
  • Mike was a corporate securities and M&A attorney with two Houston law firms prior to joining Charter Bank, at which time he was the youngest General Counsel of a public financial services company.
  • In his 15 plus years as general counsel of three public companies, Mike has handled over 40 acquisitions, 10 capital financings and a myriad of other transactional matters.
  • Mike also was the founder and CEO of Independence Bank, N.A., a start-up Houston community bank.
  • Mike received his Doctorate of Jurisprudence from the University of Houston Law Center and holds a Bachelor of Arts from Northwestern University.


Tony Pilkington

Vice President - Sales & Marketing

  • Tony Pilkington is an accomplished Senior Sales Executive with progressive and extensive experience of 26 years working in the waste industry and industrial companies.
  • Before joining WCA in January 2018, Tony served as the Vice President, Industrial Sales for Mobile Mini – Tank and Pump Division where he excelled at providing direction in business growth, revenue management, sales generation, and marketing.
  • Tony also has extensive experience in the solid waste industry. He served as Vice President of Sales for Republic Services, Inc. for nearly 10 years.
  • Tony is known and respected for combining strong sales generation expertise, sales optimization and sales process with proven management experience to facilitate business development initiatives.
  • Tony holds a bachelor’s degree from the University of Utah in Economics and holds a Six Sigma Certification (Green Belt and Lean Sigma).


Daniel Goldstein


Dan is the Vice President of Business Development for WCA, where he leads all phases of mergers & acquisitions, divestitures, and strategic planning.

Before joining WCA, Dan served as Vice President of Mergers & Acquisitions at Stericycle, where he successfully negotiated and closed transactions in the medical waste, hazardous waste, and document destruction business units. 

Dan also drove millions of dollars in annual savings as the Director of Strategic Sourcing by building cross-functional supplier relationships and maximizing internal resources to reduce organizational spend and coordinate Stericycle’s corporate procurement policies.

He holds a Master's Degree in Business Administration with a concentration in Finance and Entrepreneurship and a Bachelor’s Degree in Economics from the University of Illinois.


Robert Bartee

Vice President - Environmental Health and Safety

  • Robert Bartee is the Vice President of Environmental Health and Safety. He joined WCA in October of 2001 as the Director of Safety.
  • Robert also held various Environmental, Safety, and Health positions with Browning-Ferris Industries in Texas and Louisiana.  
  • From October of 1999 until September 2001, he was the Division Safety Manager for Waste Management in Fort Worth, TX.
  • Robert is a Certified Safety Professional and received a Bachelor of Science degree in Occupational Safety and Health from Southeastern Oklahoma State University.
  • He has over 18 years of experience in the solid waste management industry.  


Jason Saunders

Vice President - Fleet & Procurement


Jason Saunders is the Vice President of Fleet & Procurement.  His experience spans over 20 years in leadership roles for global mining organizations and national waste management companies. 

Prior to joining the waste industry, Jason’s responsibilities included managing a multi-billion dollar international mining fleet across the US, Chile, Peru, Indonesia and the Democratic Republic of Congo. 

His deep knowledge of operations, maintenance, process optimization, procurement and resource management developed him into a fleet thought leader in the waste industry and an advisory member for a major truck manufacturing organization.

Jason holds Bachelor of Science degrees in both Electrical & Mechanical Engineering from the University of Illinois.  He also has several graduate certificates for Leadership & Management, Operational Improvement, and is a Six Sigma Blackbelt.



Marcos Elizondo

Vice President - Landfill Operations & Engineering


Marcos has worked in the solid waste industry for over 24 years and has worked in the design, permitting, construction and operation of landfills, transfer stations, and recycling facilities.  He has lasting experience in P&L management, implementation of post-collection business growth plans, oversight, and management of capital investment for projects and infrastructure development. 

Marcos specializes in all aspects of planning, development, and operation for solid waste facilities with an emphasis on optimization of operations, landfill footprints and the implementation of new technology for designs such as alternate final covers, liners, and leachate management systems.  He has extensive experience in the evaluation of post-collection acquisitions by performing environmental due diligence and financial pro forma reviews. 

Marcos has worked on projects and operations for post-collection facilities in the United States, Mexico, Central America, South America, and the Caribbean. Prior to joining WCA, Marcos worked for Republic Services, Waste Management and SCS Engineers in different roles such as Region Director of Engineering, Projects Director, Area Engineer, General Manager, District Manager for Landfill Operations. 

Marcos has a bachelor’s degree in Civil Engineering and completed major coursework towards a Masters in Management from the University of Texas at San Antonio.  


Carrie Miller

Vice President - Human Resources

  • Carrie Miller is the Vice President - Human Resources for WCA and provides leadership to WCA’s commitment to delivering innovative benefits, opportunities, and solutions to our valued employees.
  • Carrie has over 15 years of HR management expertise including strategic planning, talent attraction and retention, training and development, policy administration, legal compliance, and employee relations.
  • Prior to joining WCA, Carrie served as the Senior Director of Human Resources for Key Energy Services in Houston, Texas, where she directed duties for more than 20 HR Directors, Managers, Recruiters, and support staff. 
  • Carrie served as the Human Resource lead for three acquisitions.
  • She holds a Bachelor's degree in Human Services and Psychology from Alaska Pacific University.