Online application. Afterwards you get called by a (senior) recruiter who will "interview" you over the phone, asking several questions about the job itself and about you and how you could contribute in that job and to Securitas. Last couple of questions review your motivation to work for Securitas and in that specific function. If you do OK, you'll get invited for a face-to-face interview at their HQ in Brussels where they interview you using the STAR method.