What failure, poopyhead??

His instructions were either to destroy them or modify their development to make them less one-note emotionally. He didn't accomplish either, instead only imprisoning them for a millennium or so.

His instructions were flawed.

ow do I tell someone from my previous job agency that when/if my manager opens up the vendor position for me, I have chosen to go with a different agency?

So does that mean that you might want to work with that agency in the future? Will you be applying for the job through an agency, or what? How does it work?

His instructions were flawed.

I'm not really sure what other instructions you give for a Dalek adventure. Nuance is rare (though ninth Doctor "Dalek" managed pretty well). Still, it gave rise to one awesome adventure:

Time Lord: "ZOMG Daleks R teh suxxors! Do something about it, will you? kthxbye."
Doctor: "Invisible krav maga."
Harry and Sarah: t variously get shot at, tortured, enslaved in a radioactive rocket silo and at one point nearly eaten by a giant walking clam
Nyder: "Ceiling Nazi is watching you plotsturbate."
Davros: "YOU! ARE! MY! CREATIONS! DESTROY! THE! THALS! AND! THEN! CLEAN! YOUR! ROOM!"
Daleks: "THE! DOCTOR! HAS! GIVEN! US! A! TEENAGER! GENE! YOU! ARE! NOT! THE! BOSS! OF! US!"
Good Guys: "Bling to the rescue!"

Do you need to tell them anything? If it opens and they contact you, you could just say "thanks, I'm already aware of it" and let it go at that. If it doesn't, then you haven't hurt anything.

I might want to work with that agency in the future, since they're the ones who get the largest volume of contracts in the local tech industry.

If you click through these four photos, starting here you can see me skating.

I'm with brenda. Unless there is an open question about your future with them, maybe nothing needs to be said until there IS a question.

Will they find out who got hired, if you go with another agency? Because if not, you might just say "Thanks, I'll let you know when I'm interested in opportunities with you, I'd look forward to working with you again"? And maybe by the time you have to talk to them about it again, you'll be in a position to butter them up about whatever it is making you work with them again ("I really appreciate the way you have X set up, and like the way you do Y, but at the time, your Z wasn't as strong. I'm really excited that you've revamped your procedures and Z is really great now" or blah blah)

Tom Hardy says he has bowlegs. I...I have to do research. This is delightful. How could I not have noticed?