The A127 into and out of Southend has just had some improvements made to the bottlenecks at Progress Road and Cuckoo Corner. The M25 has, and is going through major (controversial) widening works either side if the exit.
If you choose to use the A13, then Saddlers farm is also going through multi million pound improvements.
Even on the busiest summer days before this work, it only took 20 minutes to get from the Rayleigh Weir to a position 3 miles past the Airport.
The on site train station will be served by 8 trains per hour to Liverpool Street (via Stratford), and the 2nd Southend - London C2C line into Fenchurch Street is only about a £5 cab ride away.
Bristol Airport has worse access, along with Bournemouth, Cardiff and no doubt others I haven't used in order to judge.
Remember they are only looking to service around 2m pax per annum by 2020.
As for the position, they are looking for ATCO''s with ratings.