StealthGas (GASS) has hired two senior executives. Mr. Stavros Papantonopoulos has joined the company as Finance Manager. As a result, Mr. Harry Vafias will assume the role of interim CFO replacing Mr. Constantinos Sistovaris. Mr Papantonopoulos was previously employed by Goldman Sachs (GS). Dr. Diamantis Andriotis has joined the company as Chief Technical Officer, or CTO, to oversee the technical management of the growing fleet and vessels under construction.