Siems Shipyards

Siems Shipyards Corporation, commonly known as Siems Shipyards, SSC, or more rarely Siems Driveyards is one of the oldest and of the largest ship manufacturing corporations in the galaxy. It is part of the General Appliances Group, which appeared following Siems' merger with the Atlantis Corporation. Siems is one of the largest private Terran companies. It is based in Atlantis, Earth, but most shipbuilding operations happen on New Tyre. 
Siems Shipyards mainly sells products to the Terran Federation, but has recently expanded its operations to the Surben Republic as well. Siems is by far the largest military naval producer in the galaxy. It produces three times as many ships as its two largest competitors combined: the Mirdesh Syndicate of Shipbuilders and Xanadu Driveyards. It is the largest military contractor in the galaxy. Whilst the majority of its income came from shipbuilding, Siems' partner Atlantis Corporation produces infantry weapons and vehicles for the Terran Army. In effective terms, GA, which includes Siems and Atlantis, has a monopoly over defence contracts in the Federation. 
The company is based in the largest, most populated and oldest arcology on Earth, Atlantis. By the foundation of Siems, Atlantis already had around 70 million citizens, and is now home to over five times that amount. However, due to restrictions to Earth-orbit space operations, most of the companies shipbuilding happens on and around New Tyre. It has secondary headquarters located in Tyrum. It is the largest private employer on the planet. In 2719 it has initiated the construction of a ring around the planet, aiming to increase its shipbuilding output over twenty times over. 
Siems has historically been one of the most important companies of the TFR, having been involved in the production of ships which served in the First Contact War all the way up to the brand new Hades-class destroyers. The company is most famous for the Thor-class main battle frigate, which has been the backbone of the Terran Fleet since the late 2300s. SSC's revenue is almost entirely military in nature. Around 75% of the companies sales are direct military contracts, the rest being light weapon manufacturing for civilian ships and its private security branch. It has recently taken a contract to manufacture 567 Ursuul-Fa-class heavy frigates for the Surben Republic, and is the first Terran corporation to openly manufacture weapons for another nation (excluding allies). It is currently assigned to the completion of the three remaining Jupiter-class supercarriers scheduled to be complete by 2728, 2732 and 2740. It cooperates with many other companies to build its ships. The most notable of which is the Clarktech Corporation, which manufactures all shields and FTL drives for Siems ships. Clarktech also produces a great number of energy weapons for Siems. Clarktech's subsidiary, CDC Selvan is currently helping develop the Loki-class cyberwarfare frigate with Siems. Siems however has a long-time rivalry with the other major Terran ship manufacturer, Xanadu Driveyards. Whilst much larger than Xanadu, both companies have often been at odds and tried to steal contracts from each other. 
Siems has three divisions: Siems engineering, Siems Systems and Siems Security. Siems engineering is the main branch of the company, producing the hulls of ships and outfitting them with their equipment from other branches and companies. Siems Systems manufactures missiles and the electronic components for Siems ships. Siems Security is the private security force of the company. It is extremely well equipped and is sometimes even used by Terran officials as personal security. Other major companies such as Clarktech, TMP and even Xanadu Driveyards regularly use Siems Security to protect their installations and personnel. Siems, like most Terran large corporations has thousands of subsidiaries. Siems itself is a part of the General Appliances Group, which formed following its merger with the Atlantis Corporation.