A company specializing in electricity systems and industrial construction, part of the publically traded ACS group, based in Madrid.

The company won a tender of NIS 2 Billion to execute the electrification of Israel’s railway network, including the A1 Tel Aviv Jerusalem fast train. The Tel Aviv Jerusalem fast train is the largest infrastructure project built in Israel and the train's route crosses the green line in two areas into the Palestinian territory. For more information about the A1 project, see Who Profits' report Crossing the Line: The Tel Aviv Jerusalem Fast Train

SEMI will convert to electricity 420 km of existing and planned railways and will establish transformers' stations and control systems. The entire electrification project in the Israeli Railways is due to end in 2021.

The first train route that is converted to electricity is the A1 Tel Aviv Jerusalem train route. The works on this route began in August 2016, when the first SEMI vehicles arrived at the Ashdod port. In November 2016, the company initiated digging and fencing works in section A of the project (in the area of the Latrun enclave, which is located in No man's land), and in December 2016 it installed electricity poles in the area. During April 2017, the company was documented conducting electrification works in tunnel no. 1 of the A1 train route.

According to a new professional report that was handed to the Israeli Ministry of Transportation, the A1 train route will become operational by the end of 2018.