@poster; forget about GTB Jumbo pay and go for government job where there is Job security, time and peace of mind. As an engineer, any career shift into banking may jeopardize your future career plan. You hardly see any one who leaves his/her profeessional career path for a banking that will tell you he/she is satified with it(Banking).
So you need a job that will give you time to develop your self into what you hope to become in the near future, probably a highly experienced and enterprised engineer. You may go for GTB job if you do not have any serious career plan before now. Leave the Banking Job for those that its meant for!
Money is not everything and likewise things are not the way we see them.
ONE GOOD QUESTION:
HAVE YOU EVER SEEN SOMEONE SAYING HE/SHE REGRETS EVER WORKING IN SAY AN OIL INDUSTRY IN TERMS OF HIS/HER CAREER PLAN?.
Lastly please remember to coomit your ways into God's hand and your plan shall be estabilished. (Proverb 3:6).
All the best.