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Our Team

George Bronstein, Owner
Michelle Baker, Marketing and Office Support
Francisco Patron, Superintendent

George Bronstein, Owner

georgeGeorge Bronstein is the owner of Sandstone construction, a general contracting company based in Carmel Valley, San Diego that specializes in commercial and residential construction, including home remodeling, commercial tenant improvements and small to medium-size commercial developments.

A seasoned professional in the construction industry with more than 20 years of experience, George brings a strong commitment to excellence and quality to each and every job.

During the early years of his career, George worked for some of the most reputable general contractors in the industry, including Morley Builders, J.A. Jones Construction, Rudolph and Sletten, and Lusardi Construction. Along the way, George helped build some of Los Angeles most recognized buildings, including the Cathedral of the Lady of the Angels in downtown Los Angeles, the Santa Monica Public Safety Facility in Santa Monica, and the Kaiser Sunset Hospital in Hollywood (click on link below for project bios)

A graduate of the University of Miami with a degree in Civil Engineering, George has held the title of California Professional Engineer since 1995 . George has also taken several classes towards his long-term goal of obtaining a Masters Degree in Construction Management from USC’s Viterbi School of Engineering.

A native of Peru, George is fluent in English and Spanish.  He resides in Carmel Valley, San Diego with his wife and their three children.

View George’s past projects.

Michelle Baker, Marketing and Office Support

MichelleMichelle Baker advises Sandstone Construction on strategic plans for growth and business development and has years of experience facilitating the growth of various construction companies.  She has extensive knowledge of construction and construction management.

Michelle is also an attorney and helps with contracts , everything involving the office, and assists George with project management and procurement.

Francisco Patron, Superintendent


Francisco Patron supervises our in-house crew, coordinates with our subcontractors, and makes sure the projects run like clockwork, are organized, tidy and safe.  He has 30 years of construction experience and shares George’s commitment to high standards.  Francisco has a can-do attitude and is loved by all our customers.  He always goes the extra mile, brings a positive attitude, wears a smile daily, and makes us all better.