Alejandra Argudin

Alejandra Argudin

CAPP, LEED AP, Chief Executive Officer

Alejandra “Alex” Argudin was appointed Chief Executive Officer (CEO) of the Miami Parking Authority (MPA) on March 4, 2020.  The first woman to occupy the role, Argudin, has been with the Authority for 15 years.  In her capacity as a CEO, Alex implements the strategic plan that charts a path forward for the organization and evaluates the success of the Authority in reaching its goals by seeking opportunities to foster economic development, growth, and prosperity for the residents of Miami-Dade County.

Alex serves as a Chair-Elect of the Executive Committee of the International Parking and Mobility Institute. She is chairperson of the WOW Center and a member of the Greater Miami Chamber of Commerce Transportation Committee.  Alex is also the Vice-Chair of the Board of Directors of the Coconut Grove BID and a board member of the Affordable Homeownership Task Force for the City of Miami.

Alex is a graduate of Florida International University with a Master’s degree in Business Administration.  She holds the Certified Administrator of Public Parking designation and is a U.S. Green Building Council, Leadership in Energy & Environmental Design Accredited Professional (LEED AP).

If you have questions about parking issues in the City of Miami, just
Ask the CEO!

Scott Simpson

Chief Financial Officer

Mr. Simpson joined MPA in February 2006. He was previously Director of Finance for the City of Miami. He joined the City in October 1998 as Assistant Finance Director. Before that, he served as Chief Accountant for the City of Winter Park, Florida. He also worked as an accounting manager and controller in private industry for a number of years. Mr. Simpson graduated from North Carolina State University with a B.A. in Accounting. He is licensed as a CPA in the state of North Carolina and is a member of the American and Florida Institutes of Certified Public Accountants as well as the Government Finance Officers’ Association of the United States and Canada.

Angela Hernandez

Angela D. Hernandez

Director of Human Resources

Ms. Angela Hernandez is a seasoned Human Resource professional that has extensive experience in the public and private sectors. Ms. Hernandez is charged with managing the human capital strategy, training and development, and long-term strategic planning for the Authority. In this capacity, Ms. Hernandez has led a shift in organizational design and spearheaded the development of new employee benefit programs, wellness events, strategic recruitment initiatives, and various committees.  

Ms. Hernandez possesses a bachelor’s degree in Human Resource Management from St. Thomas University. In addition, Ms. Hernandez retains memberships with the Society of Human Resource Management (SHRM) and the American Society of Training and Development (ASTD). 

Roland Galdos

Roland Galdos

Senior Executive Advisor

Mr. Galdos joined the MPA in January 2017. Prior to joining the MPA, he served as the Deputy City Attorney for the City of North Miami since October 2006. Before that, he served as the Assistant General Counsel for Prestige Builders Group; and then as an Assistant City Attorney for the City of Miami. Mr. Galdos’ education includes a Juris Doctorate degree from Nova Southeastern University; a Master of Business Administration degree from St. Thomas University; Bachelor of Business Administration degrees in Finance and Business Organization from the University of Miami. Mr. Galdos is a member of the Washington, D.C. Bar and the Florida Bar. He is a Florida Supreme Court Certified County Court Mediator and is admitted to the United States Supreme Court, the United States Court of Appeals (Eleventh District), and the United States District Court (Southern District of Florida).

Henry Espinosa

Henry Espinosa

Director of Information Technology

Mr. Espinosa provides leadership for the continued development of secure, technology-driven transformations in the organization.


The primary responsibilities include:

  • Governance and policy
  • Resource allocation
  • Process automation and innovation

Prior to joining the Miami Parking Authority, he served as the Director of Information Technology for the City of Pembroke Pines Charter School District, and acted as a technology consultant for a variety of companies like CompUSA and Burger King Corporation. He is a PCI-DSS Certified Internal Security Assessor with strong focus on data security. He is a graduate of the University of Florida.

Margarita Carmenates

Margie Carmenates


Mrs. Carmenates is an experienced accounting professional with more than twenty five years of service in the public and private sectors. Before joining Miami Parking Authority, she was a Manager with an audit, tax and advisory services firm, where she served a wide range of clients. Previously, she worked as assistant controller for a publicly held oil and gas company. She also worked in the audit practice of KPMG Peat Marwick in Miami.   Mrs. Carmenates is a Certified Public Accountant licensed in the State of Florida. She is a graduate of Florida International University with a Bachelor of Accounting, and is also a member of the Florida Government Finance Officers Association.

Angel Diaz

Angel Diaz

Director of Parking Operations

Mr. Diaz started his career in parking for the Miami Parking Authority as a frontline employee in 1993. He worked in his capacity of meter collector, facility supervisor and operations manager. Throughout the years, he has managed the parking contract for the cities of Richmond Virginia and Santa Monica California. In Richmond, he oversaw 80 employees and was responsible for 8,000 parking spaces with an $18 million budget. During his tenure in Santa Monica, Mr. Diaz was responsible for 15,000 parking spaces, a staff of 75 employee and an operating budget of $60 million.

Mr. Diaz has 25 years of parking experience managing municipal parking and is certified through the International Parking Institute and The University of Virginia as a Certified Administrator of Public Parking (CAPP).