Our Staff

John Hammerschmidt


A third generation Californian, (and contractor!) John grew up in the Central Valley with dreams of becoming a farmer. He graduated from Cal Poly, San Luis Obispo, with a degree in Landscape Construction before moving to the Bay Area where he sold irrigation systems to Napa wineries, managed field operations for two landscaping firms (including his own) and two constuction companies. 

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He also did a stint as Customer Service and Operations Manager at a computer networking firm. In 1996, he founded Hammerschmidt Construction with the goal of providing superior service and project management to homeowners. He holds both Class A (Engineering) and Class B (General Contractor) California State Contractors’ licenses. He is also a Certified Kitchen and Bath Designer (CKBD), and a Certified Green Builder (CGB). John enjoys working with homeowners to design and build homes that are at the same time functional, beautiful, energy efficient, and easy-to-maintain. A long time member of the Western Horitculture Society, John enjoys fruit and vegetable gardening and cooking whatever he grows.


Lynn Hammerschmidt

A Palo Alto native, Lynn graduated from U.C. Berkeley and enjoyed a successful career as a marketing executive in four, Bay Area, medical start-up firms. She joined Hammerschmidt Construction in 1999 and oversees the “Business-of-the-Business” and assists homeowners in designing their homes and selecting finishes.


Joel Thorson
Office Manager

Joel came to Hammerschmidt Construction in 2009 and wears many hats in the company. He brings over 20 years of experience in Customer Service, Project Management and bookkeeping. Combined with his background in Real Estate and Contracts Administration he has been instrumental in keeping the office running efficiently.

Marvin Flor
Project Manager

From El Salvador and “Came to this beautiful country” at the age of 5 and married his high school sweetheart. We met Marvin while he was working for his Uncle on one of our projects.

Marvin has been working at Hammerschmidt Construction as “Project Manager” since 2019. He feels that it is a privilege to be part of the team and to manage our customers’ projects.

Josue Martinez

Born in Honduras, He loves soccer, music, and all kinds of outdoor activities. He loves learning and growing in the field of Remodeling. “The best thing about working with Hammerschmidt Construction is the way we treat each other. There is always respect, and a very positive attitude.

Mario Zamora
Remodeling Foreman

Born in the USA and raised in Uruapan, Michaocan, Mexico. He started working in construction industry as a carpenter helper in 2003 and as a remodeling foreman on the Hammerschmidt Construction team in 2019. He appreciates working with his fellow employees, sub-contractors and suppliers to successfully complete our clients’ projects.

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