GET TO KNOW US

Treeline Construction, Inc. is a California-based small business offering general and engineering construction services, with a specialized focus on historic preservation, structural rehabilitation, and seismic retrofitting. We bring decades of experience serving public and private clients, including municipalities, local governments, and long-term partners such as the National Park Service.

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Our team is known for its collaborative, solutions-driven approach. We work closely with owners, architects, engineers, and stakeholders to meet the unique needs of each project—always striving to deliver the most appropriate, efficient, and cost-effective outcomes. We go the extra mile to understand the specific constraints of each site and have built lasting relationships by consistently delivering thoughtful, high-quality work.

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Treeline has earned a strong reputation for successfully completing complex rehabilitation projects across California, often in challenging climates and sensitive environments. Our long-standing experience with historic structures allows us to offer deep insight into failure causes—ranging from waterproofing and thermal movement to advanced structural deficiencies—and to apply those insights to long-term, resilient solutions.

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We offer early-phase constructability recommendations and value engineering strategies tailored to each project. Our internal library of detailed cost data, gathered from years of field experience, allows us to estimate with accuracy and suggest meaningful alternatives during project negotiation.

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Treeline is proud to hold both a Class A Engineering License and a Class B General Construction License. Our deep commitment to the long-term health of our National Parks is at the core of our work, and we are honored to contribute to their legacy through thoughtful, preservation-focused construction.

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Leadership

Brian Ketron
President
Brian serves as Treeline’s Project Supervisor, Safety Officer, and Quality Control Manager. With over three decades in the construction industry and a General Contractor license since 2009, Brian brings hands-on expertise to every phase of construction. He has overseen a wide range of federal contracts—new construction, repair, replacement, and preservation—with an emphasis on projects for the National Park Service. Brian holds certifications in Construction Quality Management (CQM) and jobsite Safety and brings a meticulous, safety-first mindset to all projects under his supervision.

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Jenna Chandler
Vice President & Secretary/Treasurer
Jenna leads contract & business administration at Treeline as, overseeing contracts, payroll, compliance, reporting, and invoicing. Since entering the construction industry in 2004, Jenna has managed municipal, state, and federal projects with a focus on regulatory precision and accountability. Her recent work with the National Park Service has further solidified Treeline’s reputation for dependable and compliant project execution.

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Gary Linowski
Founder, Vice President
Treeline’s founder, Gary Linowski, brings over 50 years of experience in the field. Known for his innovative problem-solving in seismic retrofit and preservation, Gary is a member of the Timber Framers Guild and specializes in log, timber, and Japanese joinery. His portfolio includes the retrofit of a Bernard Maybeck building, structural reinforcement of a vertical mine shaft at Meteor Crater, and more than 17 years of work on preservation projects in Yosemite National Park.