Respond within 2 hours. "Great -- Ryan Powell, PE, CMRP is our technical lead. Would [date/time] work for a 20-minute call?" CC Ryan on calendar invite. Update DB to "Intro Call Scheduled".
Keep to 2-3 sentences. "ARPE provides MI, PSM compliance, and reliability engineering for process facilities. Ryan Powell (PE, CMRP) leads the technical side. A quick call would be the best way to see if there is a fit." Do NOT send proposals.
"Understood -- appreciate you letting me know. If anything changes down the road, we are here." Update DB stage to "Nurture". Credits refunded if no response in 90 days.
Send a free connection request with a brief note. Do NOT send a second InMail to the same person.