Let's Talk
David Sook

David Sook

Senior Vice President - Sales Manager - Equipment Finance
First Business Specialty Finance, LLC
subsidiary of First Business Bank
Brookfield, WI (Southeast Wisconsin)

David Sook joins the Equipment Finance team at First Business Bank with more than 25 years of experience in equipment finance, covering a wide variety of industries including healthcare, technology, and municipal markets. Most recently, David was helping clients nationally in the municipal equipment finance market, leveraging both direct end-user and vendor relationships. With a variety of positions in equipment finance in sales, sales management, asset management, and managing documentation and operations aspects of the business, David is expertly positioned to help your business.

David is a Wisconsin native and holds a bachelor’s degree in corporate finance from Arizona State University. In his free time, David enjoys camping, kayaking, hiking, and trail running.


Consumer Bill Payment clients may see a one-time pop up message when accessing the Bill Payment section of Online Banking informing you about heightened Virtual Card payment security.

Read More ›


Access to our Remote Deposit Capture system is intermittently unavailable; users may not be able to access it at this time. We are working to restore access as possible. If you have questions, please contact us at:

  1. Wisconsin Region: 608-232-5938
  2. Kansas Region: 913-717-6464