This was followed by public occasions such as the "Eidgenössisches Schützenfest", a Federal shooting match, in Bern in 1910, where Securitas formed a detachment with the local fire-brigade and police forces.

With the Schweizerische Landesausstellung, the Swiss National Exhibition in 1914 in Bern, the company was awarded a contract: 200 guards provide area surveillance and access control.

Despite the outbreak of World War I, with its loss of manpower due to general conscription, Securitas AG was established throughout Switzerland by this time.

To bypass staff shortages due to general conscription, the guards' wives took over their husbands' nightly rounds.

Even at the so-called "Miracle of Bern", where Germany became world champion against its adversary Hungary, Securitas guards were on duty at the press center and other special access points.

In 1964, the National Exhibition EXPO in Lausanne took place, where 300 male and, as a milestone in company history, also female employees provided security services.

In addition to a busy Bee Gees concert in February 1968, the Interessengemeinschaft Telekommunikation und Systeme TUS was founded.

In 1989, one of the guard's main tools, the control watch, was replaced by an electronic reading device, which allowed for much easier data analysis.

In 1996, Samuel Spreng was appointed as General Manager by the board of directors and took over the operational leadership of the Securitas Group on January 1, 1997.

In 2003, according to Swiss public television, Securitas sent an agent to spy on the activist organization ATTAC on behalf of Nestlé, one of the largest multinationals in Switzerland.