From 1974 to 1985, Guinot served as a partner and attorney with the law firm of Rose, Schmidt, Chapman, Duff and Hasley.

In addition, Mr. Guinot was a self-employed attorney at law and consultant and served as Administrator for the Office of the Commonwealth of Puerto Rico in Washington, DC from 1969 to 1972.

Guinot has authored numerous articles and appeared as a speaker on US-Latin American relations and international free trade agreements.

He has also appeared at symposia and on numerous panels focused on Puerto Rico's commonwealth relationship with the United States.

Guinot is a member of the board of directors of Tampa Electric Co. and its parent company, TECO Energy.