AFL Staff & Departments

Executive Leadership Team

Becky Pfundheller
President & CEO
Link to Bio

Colleen Villanueva
Director of Operations
Link to Bio

Department Managers

Tiffany Williams
Quality Manager

Dr. Stephen Wuller, Ph.D., CFS
Chemistry Technical Manager

Joon Twayana-Nagaju
Microbiology Manager

Bill Centrella
Special Projects Manager

Cedric Holloway
I.T. Manager

Sheena Swing
Vendor Compliance Supervisor

Randy Pfundheller
Facility Manager

Darlene Childs
Sales Manager

Support Staff

Broadus Whiteside
Account Manager

Zenith Wise
Sales Support Specialist

Loan Tran
AR/AP Supervisor

Lesley Adame
AR Specialist

Edwin Srisan
Lead Chemist

Microbiology Supervisor

George Goff
Systems Administration

Selam Endeshaw
Quality Assistant

Joseph Houchins
Sample Management Lead Technician

Anna Phothisen
Logistics Specialist

Evelyn Harper


Chemistry Department


Microbiology Department


Sample Management Team


Vendor Compliance Team