He's head of IT in a big company (Energy Industry), "B", and I'm in company "C". We met 3 years ago in company "A" which was also a huge energy company.

In his scope there are internal financial apps, I suppose they are doing more or less doing the same thing as in company A, meaning:

• Manage bills of expenses / expense accounts
• Manage and monitor corporate budgets (by departement / or projects / or directors)
• Manage workflow of validation processes for corporate investments
• Manage property portfolio of the group

He said "hey I remember you were into BTC, do you know how these technologies could help my business?" But there is a big difference between holding a couple of btc and alts and being a fintech crypto consultant!

I don't know much about his needs or problem he's trying to solve, we barely talked, he just mentionned the fact "I'd like to innovate"...
So can you guys think of some specific crypto technology or blockchain services designed for companies? Any hint would be welcome.

I think this is a terrible idea! It sounds like a manager who's heard of something and wants it, even though he has no idea what it does and what it's used for.
In general, if you can do something without a blockchain, you should do it without a blockchain.

BTC itself will be of no use to your case " provided i understood you well", maybe invest some of the company holdings into bitcoin ? aside from that i can't think of any possible way that you or your company will benefit from BTC for the time being.

The only thing that you might make use of is the smart contact implemented on ETH or EOS.

you can pretty much implement all the points mentioned in your post on a smart contract, if you have a running app that keeps records of all the data, you can migrate it to a Dapp on the block-chain.

He actually needs to know how he's going to use blockchain for his company. For energy industry, there are a bunch of companies in the energy industry that uses blockchain. Check and research Terawatt (for now, the only one I know though I said bunch) for how they use blockchain to innovate their process.

Most of the times a company would fall into ERC-20 eth smart contracts because it is easier to use. Quick hint you will need so many resources and they will be hard to find. *blockchain developers

I'm supposed to have lunch with him sometimes this week, so I will know more about his needs.

Which companies have implemented ETH? How they did it?

Okay what is a huge energy company?

Let’s say it has holdings in hydro power.

What does this huge energy company do with excess power produced when rivers are flowing fast due to rainfall?

If they have a deal with a mining farm they can sell excess power at floating amounts.

I consulted with a farm build that did this.

Your comment above said "as a general rule, stay away blockchain if you can", not "in the specific situation where your needs aren't clearly defined, stay away"

The title sounds on point, will check out thank you

In the first place in my opinion, I do not know how can you connect the company into blockchain technology? Perhaps, the first thing that you should know by now is, you need to what is blockchain  really all about and and what is its usages together with it features too. Though, I believed that holding bitcoin and altcoins can't be the same. But there are some companies now in the other country they connected into blockchain technology.

Can you be more specific and name some market solution or companies which have implemented such technology