The uniform on the left is a standard security uniform during the summer half of the year or security work inside buildings, while the one on the right is used during the winter and at night shifts. These two examples are just a few out of many possible variations.
Securitas is a security group based in Sweden. It was founded in 1934 and went international in 1983. The group has approximately 280,000 employees in 45 countries.
Updated picture, wasn't happy with the previous one. While the shirt looked good in the game, it turned out horrible on the picture.