The positions were all on the SERCO web site last week, as well as Total Jobs and AviationJobsearch. They expired last Friday.
I too thought it odd.
Senior ATCO (s)
Assistant (s)
Ground Officer
Note the plural !!!!!!
I cannot recall the description of the last position but NAVPI is actually 100% correct.
The Ground Officer position was probably more to do with Serco terminology covering possibly Beluga operations.
Navpi , my sources at Hawarden suggest they are expanding operational hours.