National Headquarters, Los Angeles Office
Jamie Valdivia
Executive Vice President
jaime@nationalitc.com
David Otterstein
Quality Manager
david@nationalitc.com
Jarrod Ferruccio
Chief Financial Officer
jarrod@nationalitc.com
Diana Monarrez
Manager, Certification Services
diana@nationalitc.com
Kathy Maka
Staff Psychometrician
kathym@nationalitc.com
Renee Yount
Medical Gas, STAR
renee@nationalitc.com
Ines Perez
Journey Level Plumber, Fitter, AC/Refrigeration, NBOPE,
Braze Continuity, West Virginia Fire Sprinklerfitter
ines@nationalitc.com
Metairie, Louisiana Office
Dana A. Colombo
Southern Regional Manager
dana@nationalitc.com
Donald (DJ) J. Berger
Southern Regional Representative
dj@nationalitc.com
Janel Mezzic
Certification, Medical Gas Maintenance
janel@nationalitc.com