At McKernan Inc. we pride ourselves on having what our field team refers to themselves as: The Best Door Crew in the Business. The loyalty and dedication of our installation professionals is truly what we consider to be our greatest asset, as we perform all labor in-house and subcontract none of our work out. We specialize in the furnishing and installation of commercial doors, frames and hardware throughout Southern California. When the project necessitates, we have the experience and expertise to act as your single point of responsibility for a design-build scope of work.