January 29,2010

Letter of Recommendation for John Therrell

I hired John Therrell as an SE intern on Avanade’s Infrastructure QA team in January of
2008. During his internship I was his direct supervisor up until my departure from
Avanade in June of2008.

In a largely Microsoft environment, John provided support for our physical and virtual
server environments ranging from hardware installations to software deployment and
troubleshooting. He was a valued team member who brought an attention for details to
his work. John worked well with our cross functional teams and had many opportunities
to assist these teams in an Infrastructure QA capacity. The feedback I received from
other team members was positive and I was happy to have John represent our team with
technical project efforts.

Some projects and/or tasks of note that John played a role in include: Vista bitlocker
deployment testing, writing and executing test cases for Infrastructure QA projects, and
assisting with the migration of Microsoft Virtual Server 2005 virtual machines to a
clustered Hyper-V environment.

John’s professional manner and willingness to collaborate added to his value as a team
member. It was a pleasure working with John and I am happy to provide this letter of
recommendation and to see his career continuing in the Information Technology field.

Regards,

Brent Sommerseth
Avanade QA Infrastructure Team Lead/Supervisor 2006-2008