I worked with Jacobs as Full time employee - Quality Inspector Jacobs Employee Review

I am a Full Time employee of Jacobs, without of the advance notification , just a week in advance the Jacobs issued a Company Convenience Leave of absence letter to me for signing , it means that Company put me on employment with only 4 days of prior notification , I thought the Jacobs as Big and International Company , but when I face with this situation of this company it made me to feel very uncomfortable, it means the Jacobs does not think about Job security of employees they Just think about their benefits , I worked with very small companies before Jacobs, but I never face with the situation anywhere