[3] A former employee in the structural division of State Division of Architecture, Sauer served in World War II as a commander in the Navy Seabees, exploring a suitable site in the Pacific Northwest where an air base made of ice could be constructed (the project was canceled) before being stationed in Japan to oversee reconstruction projects until he was discharged, when he returned to Sacramento to start his own firm.

[15] In 2011, California Governor Edmund G. Brown Jr. appointed Kit Miyamoto to the Alfred E. Alquist Seismic Safety Commission.

[17] The company was also involved in structural seismic redesign of LAX’s iconic Theme Building and the Griffith Observatory in Los Angeles.

[18][19] In February 2020, Miyamoto opened an office in Ponce, Puerto Rico to assist with damage assessments and reconstruction efforts after the January 2020 earthquake.

[24] After earthquakes or other natural disasters occur, they provide technical advice and damage assessments to aid in the restoration and resilience of affected areas.

[28] In a partnership with Pan American Development Foundation (PADF), Miyamoto International arrived shortly afterward to aid local professionals in the reconstruction.

[29][30] The United Nations Office for Project Services (UNOPS) worked with the Haitian government and Miyamoto International in Port-au-Prince to assess the extent of the structural damage.

[31] Miyamoto International also trained locals in masonry and structural engineering so they could repair their homes or rebuild new quake-resistant buildings.

[44] On March 11, 2011, an earthquake measuring 9.0 occurred off Japan's east coast, resulting in a tsunami that claimed the lives of 15,883, and damaged the cooling system at the Fukushima Dai-ichi nuclear power plant.

A team of disaster response experts from Miyamoto International was dispatched to assess trekking routes on the foothills of Mount Everest and to rural villages 20 km outside Kathmandu's capital.

[59] After assessing building collapses and failures, the team identified poor construction quality and lack of code enforcement for widespread destruction.

[60] On September 8, 2023, a magnitude 6.8 earthquake struck the Atlas Mountains south of Marrakech, Morocco, killing an estimate of 2,900 people.

[65][66] 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 In 2004, Miyamoto won the Best Use of New Technology in Retrofit/Alteration Certificate of Merit Award from the Structural Engineering Association of California for their work on the Stockton Hotel.

[71] In 2008, the company received the award for Best Low-rise Office Building from the Precast/Pre-stressed Concrete Institute for their design work on the Golden 1 Credit Union Headquarters in Sacramento, California.

[72] In 2008, they also won a Large Project Certificate of Merit from SEAOC in the Retrofit/Alteration category for their work on Griffith Observatory in Los Angeles.

[73] In 2009, they received a President's Award in the Large Rehabilitation category from the California Preservation Foundation for work on Globe Mills in Sacramento.

[77] In 2010, the company was also recognized for their work on the Eisenhower Medical Center with the AIA North Chapter Citation Award for Commercial Architecture.