Excel & HubSpot specialist

We have an Excel file listing >30.000 wind farms worldwide. This has been prepared and then imported into Hubspot so that we can communicate with energy companies based on which turbine models they own. A friend's son did this before but now has a full-time job. However, he wrote a long manual for how it is done. We need an Excel & HubSpot specialist who can take over this task. Hubspot hasn't been updated for a while, so first, we want you to make our database up to date and then maintain it.