Fill in the fields on the left, copy the HTML on the right, paste into Gmail → Settings → Signature. No design team, no IT ticket. For IT/HR there's a bulk mode below for all 40 people at once.
notum.tech (logo + "Notum Technologies").
Cmd/Ctrl + V (Gmail recognises HTML automatically).firstName,lastName,position,phone,email,linkedin (one person per line, header on first line). Generates a list — copy each one or download all as .html files.