Both jobs will require offshore exposure otherwise you will not know what your crew is doing and facing daily while carrying out your work. Don't go for the money alone as you'd be stuck going offshore forever and trust me you don't want to be in your 40's and be asked to do things by manager who barely hit 30s. As far as career development is concerned being formerly of SLB and having offices and friends in Halliburton, Weatherford and Baker Hughes, SLB is better and you can see that from the cross sectional of population and the management level balances. As for pay package for experts Baker and Halliburton pays well. I can't comment on Transocean since I only have people in the support function there, pay is not bad for the support staff for Transocean but the operator/client pays better.