Semac Construction S.A. was established in 1992 in Greece. It has over 2 decades of experience in the oil & gas / industrial sector. The last 20 years was involved in construction of several major projects in Greece, in the field of Oil & Gas, Road Tunnels and Metro Stations. Today is one of the leading engineering & construction companies in the Oil & Gas, Petrochemical, Power and Heavy Industry sectors.

Over 20 Years Milestones

1992  Electromakedoniki Ltd. was established in 1992
1994  A new Automation department was created
1997  Electromakedoniki changed name as Semac Elekromakedoniki S.A.
2004  The company moved to new company-owned building in industrial area of Thessaloniki. Semac Electromakedoniki S.A. was divided in two companies, Semac Construction S.A. & Semac Automation S.A.
2009  Semac Group completed its new 2000m2 facilities adjacent to the existing ones
2012  Semac Construction expanded its activities in the area of Middle East


  • Instruments. Calibration and installation
  • Prefabrication and erection of Piping
  • Steel Structures. Prefabrication and erection
  • Equipment construction
  • Electrical substations construction
  • Electrical Equipment installation
  • Skids design, construction and testing


Semac Construction S.A. is active in the sector of electromechanical projects in fields such as:

  • Oil & Gas
  • Power Generating Plants
  • Steel Industry
  • Road Works
  • Submerged Tunnels
  • Infrastructure Projects
  • Biological WasteWater Treatment
  • Buildings / Structures


Our strategy for the future is to develop independent equipped dynamic task forces, consisting from our engineers, foremen and technicians in the range of the company expertise, in order to provide and respond efficiently to any construction challenge assigned to us worldwide.

Human Resources

Human Resources for Semac Construction rep-resent both, a strategic choice and a major investment. Company’s personnel higher academic background combined with training on special sectors is a guaranty for the accomplishment of most demanding requirements of industrial projects in competent and efficient manner.


The establishment (built on self owned facilities) consists of administration building, light structures building and a separate building for heavier mechanical activities fully equipped. We also have a Branch establishment in Mandra Athens with administration offices and construction factory fully equipped in order to support our construction sites at Southern Greece within the spirit of the company values.


Semac Construction S.A. is based in Northern Greece at Thessaloniki’s Industrial Zone near to the port, close to the main railway station of Sindos, on the Egnatia road leading in easy way either to the airport of the city or to the national road towards Athens and even to Turkey,Bulgaria, FYROM and Albania.