I can see…Mining as it is manual labor.
Enchanting for blowing things up, and extracting the magic from it.
Inscription because Runeforging.
Skinning? Maybe Jewelcrafting?
But like…I can’t see a Super Zombie picking flowers or making machinery or sticthing robes.
What does a Death Knight actually do besides fight? Basically nothing right?
like, can you imagine a Death Knight doing a pet battle? playing a card game? 
Enchanting and Inscription.
Herbalism and mining.
Gotta strip mine the earth of life!
None, you are dead. Why would you want to work?
The most metal answer! \m/
Mining and blacksmithing since you’re metal armor.
I always figure it should be mining and skinning, because as “A Living Machination of Death and Destruction”… would they really have time for the book learning it takes to learn a trade? And you’re right, I can’t see them picking flowers.
kinda what I was thinking lol. that or enchanting if only for the aspect of breaking things to extract the magic to use elsewhere.
Could argue that they do Engineering for machines of war. Picking flowers to turn into poisons or some such with alchemy. Stitching robes would probably be a hobby inbetween mass murders. Blacksmithing would be a given.
Amazing I never thought about looking into this because I’ve never player a Death Knight… But searching this site, none of these seem to indicate any of these professions were ever designed with a death knight in mind.
What I was searching for is something that helped the death knights minions. So I suspect something like Inscription because you can craft your own glyphs.
Goblin engineering for blowing things up
Alchemy for making combat potions and toxic phials
Blacksmithing for practical uses such as crafting weapons
Inscriptions since they already work with runes (runeforging)
Mining to gather ore for blacksmithing
Not leatherworking or tailoring.
Herbalism gives me some amusement when I go to gather herbs and wind up with a lovely flowered hat and flower basket (herbalism gear). It looks so out of place, but sometimes it’s good to have a laugh.
on second thought, maybe Tailoring might make a little bit of sense, if only for First Aid and bags.
other things fit more, but I can’t completely rule Tailoring out, I guess.
“Good news everyone!”
Skinning.
definitely Skinning, as it allows the DK to sate its Eternal Hunger in a purposeful way, rather than just pure wanton slaughter of bandits or whatever.
and also to make some gold here and there.
This character is an assistant manager at a Hot Topic
Blacksmith and Enchanting
Gotta be able to maintain your own equipment, and we do runeforge stuff which makes sense enchanting wise
DKs don’t sleep and there is a library in Acherus and 3 wings, 1 for each school of magic. plenty of time in between fighting for study, research, and pet battles.
eng/ach
the mental image of a DK doing Pokemon…
i have a whole collection of undead pets