Shinra Inc.

The Shinra Electric Power Company, also called simply Shinra Inc., is a mega-corporation that acts as the main antagonistic force in Final Fantasy VII (even tough Sephiroth is considered the main villain).

The company
Shinra is a powerful corporation that rules the entirety of Gaia. They have a complete monopoly over the Mako Energy, which is used as a power resource by the entire planet. The company acts as the government and military, having a word at anything and everything that happens in the planet. They keep people in-line by providing people with the basic necessities, such as food and electricity, and have their own well-trained military force to fight off any resistance to their rule. The company is very well organized, having a president and a board of directors, each of them responsible for a department of the company.

President Shinra
Shinra is the founder of the company, acting as the President. Being the President, he has complete control over the company, and all directors answer directly to him.

Rufus
Rufus was the son of Shinra, acting as the Vice-President of the company. After Shinra is murdered by Sephiroth, Rufus assume control of the company.

Heidegger
Heidegger was the highest officer of the company, responsible for the Department of Public Relations and Safety Maintenance. He had control over the military force of the company and the elite SOLDIER squad.

Professor Hojo
Hojo was a scientist, responsible for the Department of Science and Research. He was in charge of the Mako Research and the JENOVA Project, used to create the perfect SOLDIER's by injecting them with Jenova cells and Mako Energy.

Scarlet
Scarlet was responsible for the Department of Weapons Development, which did exactly what it's name suggests. She was responsible for creating all of Shinra's weapons and robots, as well as the Sister Ray Cannon in Junon.

Reeves
Reeves was responsible for the Department of Urban Development, which was in charge of administrating and maintaining all cities. Secretly, Reeves was the one controlling the Cait Sith robot to keep an eye on AVALANCHE.

Palmer
The incompetent Palmer was responsible for the Department of Space Exploration. The department was created to explore space, but it failed miserably. However, it was not abolished, since it could still have some use.

The Turks
The Department of General Affairs, better known as The Turks, was a division of elite agents of Shinra, responsible for carrying covert operations for the company, such as espionage and assassinations, also serving as escorts and bodyguards for Shinra's executives. The Turks reported directly to Heidegger. The group was composed by Tseng, who acted as their leader, as well as Reno, Rude and Elena.