Rare, a few things.
For Strurm, its alright if you simply don't have a history for him, but if you do and are keeping it secret I'll need it PMed to me.
For Druslius, you know that for Turians military service is compulsory right? All Turians born into normal Turian society serve in the military whether they like it or not, man and woman alike. He's still allowed to like it but he's not joining specifically because he likes it, he's joining because when you're Turian, thats what you do.
Dervish is the resident Turian expert, but I bellieve they enlist at fifteen and serve for fifteen years normally.
Other than that, his reason for founding a merc group is a little weak. ITs quite an impressive endeavour to set up an organised group like that, and if he is so law abiding and order loving, why go out to Omega and set up what is essentially a hit squad? It doesn't really make sense.
Finally, given that Turians serve in the military so much, and their military lives are generally quite active, he'd still be in pretty decent shape at 42, especially as it hardly seems that he'd let his body go to hell. Turians can easily make 100 usually, and as far as I know have lifespans that match humans roughly. For reference, that means 150 is about as old as they can get with genetic engineering and cybernetics.