1968 - 1971:
GDF S.A. - Air Conditioning Installation Company.
1971 - 1974: EMECRA S.A. - Air Conditioning Installation Company.
1974 - Studio Eng. German Grinberg & Associates. Now, Studio Grinberg Engineering Consultants.
Start up position: Senior Project Designer, later on taking charge of the Project Design Department of the Studio.
From 1980 onwards, as a consequence of his increasing participation he became an Associate of the Studio. Currently acting as HVAC, heating and mechanical installation manager.