Here is my 2 cents

1. Ensure that the documentation, queries etc are in the appropriate version control system.
2. Escalate to the functional manager the technical member reports to.
3. If the situation occurs again after 1 and 2, ask for a replacement resource that might be a better fit for the maintenance effort.

Here is my 2 cents:

• 1. Ensure that the documentation, queries etc are in the appropriate version control system.
• 2. Escalate to the functional manager the technical member reports to.
• 3. If the situation occurs again after 1 and 2, ask for a replacement resource that might be a better fit for the maintenance effort.