1. Understanding the client's business requirements: I will work closely with the client to understand their specific business requirements and the data they want to extract from their MS SQL Server database.

2. Designing the SQL query: Based on the client's requirements, I will design a custom SQL query that will extract the desired data from the database.

3. Testing the query: I will test the SQL query to ensure that it is accurate, and efficient, and returns the desired data.

4. Delivering the query: Once the SQL query has been tested and validated, I will deliver it to the client in a format specified by the client, such as a SQL script or a document.