TBH - if you can do it yourself - I would - less hassle getting it done and you will know its done properly
Any tubing would be fine (corrugated?) as long as it wont "collapse internally" under the weight of the concrete otherwise a cable "re-pull" if needed in the future , might be problematic.
You may need to cut the tubing length-ways (Stanley knife?) to be able to push the cable inside and then finish it off neatly with a run of waterproof gaffer tape to cover the "slit".
-------------------- John --------------------
I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router +2 Airport Express's. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.
It's just that I'm somewhat leery of burying cables or pipes under concrete, so it's worth seeing if there's a workaround and VM is accustomed to routing cables around all kinds of obstacles and should be helpful in finding a good solution.