Manuel retired from Compaq Computer Corporation in 1999, where he was Senior Vice President in charge of the International Division.
He was a member of the Corporate Strategy Team and was responsible for the manufacturing, marketing, sales, service and support of all Compaq products in the Latin America and Caribbean region; he had 14 subsidiaries, 1 manufacturing facility and 6 service centers reporting to him. The division had 1,800 employees and annual sales of $3.4 billion.
He also supervised the Global Accounts Group, responsible for the marketing, sales and support of all Compaq products and services to the top 100 corporate customers on a worldwide basis.
From 1986 to 1990, he was the Vice President of Government, Communications and Services Line of Business for Unisys Corporation.
From 1976 to 1986 he was President of Parra Myers Associates a company with operations in the United States and Latin America specializing in the development of integrated systems for the transportation sector and public utilities.
At various times, he has been a consultant for the United Nations Development Program, the World Bank and the Inter-American Development Bank.
Manuel served as Mobilize.Net Corporation's founding Chairman of the Board from 2012 through 2020, where he continues to serve on the Board of Directors.