|December 1983||Joined Banco Bradesco SA|
|January 1985||Senior Manager, Arthur Andersen (Accenture)|
|March 1996||System Director, Toshiba America Electronic Components, Inc.|
|December 1997||Solution Service Vice President, i2 Technologies Japan, Inc.|
|May 2004||Vice President & CIO (Chief Information Officer), Nissan Motor Co., Ltd.|
|April 2006||Corporate Vice President & CIO, Nissan Motor Co., Ltd.|
|April 2014||Senior Corporate Vice President & CIO, Nissan Motor Co., Ltd.|
|June 2017||Statutory Auditor, Nissan Motor Co., Ltd.
*Mr. Guiotoko has resigned from the office as Statutory Auditor of Nissan Motor Co., Ltd. as of May 11, 2018.
|March 2019||Outside Director (Audit & Supervisory Committee Member), Coca-Cola Bottlers Japan Holdings Inc.
Executive Officer, Global Chief Digital Officer, Nishimoto Co., Ltd.
|March 2020||Director, Global Chief Digital Officer, Nishimoto Co., Ltd. *|
|March 2023||Outside Director, Coca-Cola Bottlers Japan Holdings Inc. *|