[pseudo0]

If you're not sure, you can always just use the person's given name instead of a pronoun. This works 100% of the time, while pronouns in a signature block aren't very helpful if you're referring to someone who got CCed but has not replied to an email chain.

[pseudalopex]

Often but not always. Given name is too informal in some situations. Completely avoiding pronouns can sound awkward too.

[pseudo0]

The OP mentioned the technology industry, which tends to be pretty informal. At least personally, the vast majority of my correspondence uses first names rather than honorifics. I agree that it can be a bit stilted, but it's better than awkwardly mixing up a person's gender.

[pseudalopex]

They said they worked in tech. They asked about industry generally.