The Commission dates back to 1954 when Civil Service Commission was established by British Colonial Government following Holmes Commission Report, 1948; Civil Service Commission was advisory to the Governor in matters of appointments; At independence in 1963 it was enshrined in the constitution and renamed Public Service Commission; Independence Constitution had Regional PSC’s but abolished in 1964 following constitutional amendments; It is the oldest Constitutional Commission and its mandate has expanded over the years. The Commission then constituted of a chairman, a deputy chairman and fifteen members all appointed by the President. The Commission, since then, has handled matters of human resource management in the public service especially the civil service and local authorities. Constitution of Kenya, 2010 promulgated on 27th August 2010 reconstituted the Commission with a redefined and expanded mandate and a lean membership.For appointment to this grade, a candidate must have a Diploma in the following disciplines: Petroleum Geoscience, Industrial Chemistry, Analytical Chemistry, Environmental Chemistry, Chemical Engineering, Applied Technology( Technical & Applied Physics), Earth Science, Petroleum Operations or Cartography & GIS from a university recognized in Kenya. Duties and Responsibilities This is the entry and training grade for this cadre. An officer at this level will work under the guidance of a senior officer. Duties and responsibilities will include:- participating in collection and compilation of petroleum data; participating in updating petroleum and technical databases; participating in labeling and sample preparation for analytical work; and undertaking analysis on rock, water, oil and gas; participating in petroleum geoscientific field surveys; and assisting in maintenance of laboratory and survey equipment for geoscientific petroleum activities.