National oil giant Saudi Aramco plans to upgrade the security in its offshore facilities and has received bids for the work from defense companies, Reuters reported.

The contract includes installing long range integrated security systems at nine offshore sites in the Gulf.

The American Raytheon Co, Germany’s Rheinmetall AG, Leonardo’s Selex ES Saudi Arabia, and General Dynamics applied for the tender, Oil Price stated.

As the company stated, Aramco “considers the security of its employees and facilities a top priority and are of the utmost importance. Accordingly, Saudi Aramco is currently evaluating the bids. It is expected that the national oil firm will award the security contract by the end of 2017 or the beginning of 2018.