I'd say most of the coaches would be safe for 2019.
UQ- Heenan probably has the job for life if he wants it. His sides have shown repeatedly over a long period of time that they respond well to his methods. It does help having quality players such as Dalglesh, Gale, Korczyk, Foley etc but in saying that he is able to bring players into the squad that do their job and do it very well. Will be going no where, rusted on for a long time to come.
GPS- Matho has been outstanding and has brought the club back to where we were a couple of years ago both on and off the field. Only way he won't he around next year is if he gets headhunted for higher honours. Not having Gormo this season has had a few challenges but bringing players through like Gicquel (the kid is a freak), Treleaven & Nicholson shows he can spot talent and develop them into Premier Grade Players. Players such as Freeney, Burke Ricko, King have all flourished under his coaching. Very safe in the role for the next few years at least.
Souths- ET has done well getting the club back into the four. Relationship with Buzz is strained at times apparently so Picone might not be around next season as his agency work might take priority. Has done well with the stable managing the players and will see what happens comes finals. If they don't make the GF though it will be seen as a disappointing season especially now with the inclusion of Hunt. Safe if they make the GF, but still safe.
Easts- Connellan has bounced back exceptionally well after the disappointment of 2017. His side is really well drilled and playing great footy. The likes of Reddy, Gunn and Wright have all made a fantastic impact to the side's performance but he has done very well bringing young players through. They have a tough few weeks to finals but I'd expect them to make the four and could be a real smokey of taking the flag. Will be going nowhere, highly respected at Tigerland.
Bond- Anderson is another who has done above expectation this season. The Bond side is playing very entertaining footy and it could be touch and go if they make the four. Could come down to their final match against Norths. Players such as Nucifora, Sargent, Slipper, Manu have been great and Ford has been a standout and probably the best player in the comp this year. Watch out if the crack the Four. Locked in for sure, my tip for 2019's flag.
Norths- Fogarty has had a pretty noticeable impact with the Eagles since his arrival a few years back. No longer are they considered the easy beats of the comp and are a highly competitive unit. Probably missing two or three Premier Grade Players. Losing Tonga at the start of the season and Chitterden, and Tuapou at the start of the second round has knocked a bit of class off the side but players such as Vuki, Jones, Campbell and Chapman have all shown strong improvement under the Norths program. Best man for the job.
Wests- Byron has probably under achieved this year after making the 4 last season. Has been at the club for a number of years now when things were pretty grim so it would be nice if he could be given another season to deliver finals. Really strong roster with players such as Lynch, Wihongi, Dillon, and Andersen all having strong seasons. Should be safe if loyalty counts.
Sunnybank- Virtue could be under a little pressure to keep his job. The dragons have definitely underperformed in 2018. After just missing out on a GF birth last season they could potentially get the spoon. Lucas was missed greatly once he left for 20s duties and the side seems to be not playing with the same freedom as previous seasons. Will be interesting to see what they do come end of the year. Under the most pressure.
Brothers- Marshall would have to be unlucky to be given the flick after this year. Pretty obvious that they have blooded a number of younger players in a view to the following years to come. They haven't been that awful this season just a tad unlucky. Wilson has been exceptional this year and is playing well above his years and the likes of Lawson and McReight will be very influential players in the years to come. Would be mad to punt him, proven winner.