Kathryn Cahill Thompson

Kathryn joined Cahill Contractors as a Project Engineer in 2007, becoming the fourth generation of the Cahill family to work in the construction business. Kathryn held positions in project management, preconstruction, and operations before taking on the CEO role in 2016.

Prior to Cahill, Kathryn worked in management consulting, nonprofit strategy consulting, and education. She is a member of the Board of Directors of the San Francisco Chamber of Commerce and serves on the Steering Committee for the annual Construction Industry Lunch-O-Ree benefitting the San Francisco Bay Area Council of the Boy Scouts of America.

M.B.A. – Stanford University Graduate School of Business

A.B., Economics/Geography; Engineering Sciences minor – Dartmouth College

LEED AP

Blair Allison

As President, Blair oversees all Cahill company operations and projects.  Blair has nearly 30 years of experience in the construction industry and has been with Cahill since 1996. Blair opened Cahill’s Oakland office in 2008 and grew Cahill’s East Bay work to be a core part of the company’s backlog. Blair is a licensed general contractor in the state of California.

B.S., Construction Management – Texas A&M University

LEED AP

Guy Estes

Guy joined Cahill in 1992 as a Project Engineer and now serves as Executive Vice President. Guy has deep experience in both preconstruction and construction, which he lends to support all Cahill projects.

M.S., Civil Engineering – University of California, Berkeley

B.S., Civil Engineering – Cornell University

LEED AP

Greg Gangitano

Greg joined the company in 2019 and is a vital part of the Cahill team.  As Vice President and Cahill’s General Counsel, he plays a crucial role in maintaining our exceptional standards in Risk Management. His proactive approach and expertise ensure that we navigate risk effectively, safeguarding the company’s interests and promoting a secure business environment.

Arash Baradaran

Arash provides executive leadership of projects through preconstruction and construction, while also helping lead Cahill’s preconstruction efforts in its San Francisco office. With a background in structural engineering, Arash has over 20 years of experience in the construction industry, including over 10 years at Cahill working on projects including multi-family apartments and condominiums, hospitality, and education.

M.S., Construction Engineering & Management – University of California, Berkeley

B.S., Civil Engineering – University of California, Berkeley

LEED AP

Matt Irwin

Matt provides executive leadership  to Cahill projects across all sectors while also leading Cahill’s self-perform efforts in concrete and wood framing. Matt joined Cahill in 2006 and has spearheaded successful education, multi-family residential, and renovation projects in San Francisco and on the Peninsula.

B.A., Architecture/ Minor in City Planning – University of California, Berkeley

LEED AP

Certified Green Building Professional

Nate Kaufman

Nate provides executive leadership of projects from business development through preconstruction and construction.  Additionally, Nate leads Cahill’s Oakland office and oversees Cahill’s BIM coordination efforts.  Having worked at Cahill in project management and estimating since 2005, Nate’s experience spans a wide range of market areas including residential, commercial, and occupied rehabilitation. 

B.S., Construction Management, Minor in Business Administration – California State University, Sacramento

LEED AP

Leadron Koo

Leadron has over twenty years of experience in the construction industry. Since joining Cahill as an Intern in 1997, Leadron has extensively worked both in project management and estimating. A well-rounded leader and collaborator, Leadron has managed projects across healthcare, multifamily, and education market sectors.

B.S., Civil Engineering- University of California, Berkeley

LEED AP

Mark Zaleski

With over 30 years of experience in the construction industry, Mark manages preconstruction and estimating for projects from early conceptual stages to final pricing. He assists clients with budgeting, bidding, site logistics, scheduling / phasing, constructability reviews, researching alternatives, and value engineering.   He also has extensive experience in green building and is a LEED Accredited Professional.

Mark is a former US Navy Civil Engineer Corps officer with naval training and was stationed in Monterey, California, and Italy. He is currently a member of the Oakland Catholic Diocese design review board and serves as Chairman  of his church’s finance council.

M.S., Civil Engineering (Construction Management) – UC Berkeley 

B.S., Civil Engineering (emphasis in structural) – UC Irvine

EIT from California, Tau Beta Pi Engineering Honor Society

LEED AP

Matt Dennig

As Project Executive, Matt leads major projects from preconstruction through construction, while also leading Cahill’s warranty and small projects teams. Matt has 22 years of Bay Area experience in the construction industry, including over 15 years at Cahill working on projects including senior housing, multi-family apartments, historic renovations, and education.

B.A., Economics – Sonoma State University

LEED AP

Michelle Jacobson

As Preconstruction Executive, Michelle serves as a lead partner to our clients through all stages of preconstruction. Michelle helps clients meet budget goals, analyze design alternatives, and resolve constructability issues so that projects are set up for a smooth and successful construction process. Michelle has 19 years of experience in construction across projects that include multi-family and senior housing, factory-built construction, historic renovations, and education.

B.S., Civil Engineering – California Polytechnic State University, San Luis Obispo

Rob Fregulia

Rob has over 28 years of experience in the construction and homebuilding sectors. As CFO at Cahill, he leads the accounting and finance functions with a strong emphasis on process improvement and team building. Rob’s commitment to delivering accurate and timely financial reporting enables the creation of meaningful forecasts and projections that align with and support the company’s goals and needs.

BS in Finance and MA in Economics, Cal State Hayward.

Mina Barzanian

With over 20 years of experience in the construction industry, Mina manages day-to-day operations within Cahill’s accounting department, oversees the accounting team, and ensures accuracy and efficiency in accounting across all Cahill projects and departments.

B.S., Mathematics – San Francisco State University

Minor in Managerial Accounting – University of California Berkeley Extension

Steve Wellman Jr.

Following in his father and grandfather’s footsteps, Steve joined Cahill in 1993 as a carpenter. Nearly 30 years later, he is now the General Superintendent.

As the General Superintendent, Steve manages superintendents on multiple jobsites while providing insight and thoughtful leadership by promoting best practices and encouraging continuous improvement in our approaches. Additionally, Steve facilitates coordination with other departments and interfaces with external stakeholders to ensure excellence across all Cahill operations.