Where do we begin? First of all, there is no overtime. don't be fooled with how it is described. Lieu hours are held at ransom and very rarely given in the manner in which they should. By forcing the engineers to come home on a weekend limits their liability to give lieu days, however you will be expected to work a significant number of hours during the week, up to and exceeding regularly your weekly contracted hours.
HR are a mess. Its no surprise that some many people leave and the turnaround is high. The policies are set up to exploit employees and are detrimental to health and safety, morale, and reputation of a company. HR have no clue about their own policies and when challenged, the concerns are ignored and swept under the carpet, rather than reforming, despite losing high numbers of senior management on the back of said policies.
The product concept is tremendous and has a high potential for success. However decisions made to just send the units and fix them later is only going to cause problems for customers and eventually they will lose faith and of course tell an already institutionalised industry to avoid it for fear of delay and COF.
Due to the high demands of the working hours and stress that is placed on the integration and field engineers, Rapiscan are at huge risk of losing the small handful of engineers (who are exceptional at what they do) and losing this base of knowledge that is not spread across the departments.
In particular, if one specific employee was to leave, the company would be in a tremendous mess for a significant period of time until someone else can get up to speed, and really, they don't pay this person nearly enough to keep his services.