Dr. Osama M. Shawa established Entechs by the year 1972 in San Francisco, California,. Entechs acquired since then a foothold in the area of Civil and Structural Engineering. Dr. Shawa has participated in prestigious and sophisticated jobs. These included a Federal Building in Alaska, some Nuclear Power Plants in USA, and earthquake resistant Piping Systems, Structures, and buildings. Progressive Computer software was used confidently.