Executive Bios

William H. Lyon

William H. Lyon

Executive Chairman and Chairman of the Board

Mr. Lyon currently serves as Executive Chairman and Chairman of the Board. He first joined the company in 1997 and has served in varied capacities, including Assistant Project Manager, Project Manager, Director of Corporate Development, Executive Vice President and Chief Administrative Officer. He has also held the positions of President and Chief Operating Officer, Chief Executive Officer and President of William Lyon Financial.

Mr. Lyon is active in the Orange County community and serves as a Board Member for the Commercial Bank of California as well as Pretend City Children’s Museum. He served actively on The Bowers Museum Board of Governors until 2014 and is currently an honorary member. He earned a dual Bachelor’s of Science degree in Industrial Engineering and Product Design from Stanford University.


Matthew R. Zaist

Matthew R. Zaist

President and Chief Executive Officer

As President and Chief Executive Officer, Mr. Zaist is responsible for the management of the company's overall strategic objectives and operations. Mr. Zaist continues to lead as as a member of the Executive Committee and Chairman of the Land Committee. In his prior capacity as President, Mr. Zaist oversaw and managed William Lyon Homes’ IPO in 2013 and before that its recapitalization efforts in 2011 as well as the company's expansion into Colorado, Oregon and Washington. He joined the company in 2000.

Mr. Zaist is a member of the Executive Committee for USC’s Lusk Center for Real Estate. He earned a Bachelor’s of Science degree from Rensselaer Polytechnic Institute in Troy, New York.


Brian W. Doyle

Brian W. Doyle

Executive Vice President and Chief Operating Officer

Mr. Doyle joined the William Lyon Homes team in 1997 and has served in various division leadership roles including Division President of Southern California, Regional President of California and EVP of Operations culminating with his promotion to Executive Vice President and Chief Operating Officer. In his current position he oversees the operations of the company’s seven markets across the Western region to drive operational excellence and growth.

Mr. Doyle's career has spanned more than 25 years in the real estate industry. Prior to joining William Lyon Homes, Mr. Doyle served in several Sales and Marketing leadership positions with California Pacific Homes, the FDIC and Pacific Scene, Inc. Mr. Doyle earned a Bachelor's of Arts degree in Economics from California State University Long Beach.


Colin T. Severn

Colin T. Severn

Senior Vice President and Chief Financial Officer

Mr. Severn joined the William Lyon Homes team in 2003 and served in various accounting and finance roles, culminating with his promotion to Senior Vice President and Chief Financial Officer in 2009. In his current position he oversees the company's accounting, finance, treasury and investor relations functions and is a member of the Land Committee.

Mr.Severn’s career has spanned more than 20 years in real estate accounting and finance, including positions with an international accounting firm and other homebuilding corporations. He earned a Bachelor’s of Art degree in Business Administration with concentrations in Accounting and Finance from California State University, Fullerton and is a Certified Public Accountant in the state of California.


General William Lyon

General William Lyon

Chairman Emeritus

General Lyon has enjoyed an illustrious, distinguished career as a successful businessman, decorated member of the military and an active supporter of the community. He first entered the homebuilding business in 1954 and his companies have since produced more than 100,000 residential units spanning more than 60 years. In recognition of his many achievements, General Lyon was inducted into the California Building Industry “Hall of Fame” in June 1985. He was also the Chairman, President and CEO of AirCal, a regional airline in 1982 which later merged with American Airlines in 1987.

General Lyon flew in World War II and Korea. He has been decorated with numerous awards and honors, including the Distinguished Service Medal, Legion of Merit and the Distinguished Flying Cross. He also served under President Gerald R. Ford at the Pentagon as Chief of the Air Force Reserve from 1975 to 1979, retiring as a Major General of the United States Air Force Reserve.

General Lyon is a much-admired and respected member of the community and his extensive list of board affiliations serves as a testament to his commitment to serve the greater community.  His past service includes former Director and Chairman of the Board for the Segerstrom Center for the Arts. He was the founding Chairman of the Orangewood Children’s Foundation and past Chairman of the Boy Scouts of America, Orange County Council.