Jimmy has delivered solutions ranging from shrink–wrapped products to enterprise e–commerce applications for Fortune 100 customers. He is an active member in the .NET community, leading open source projects, giving technical presentations, and facilitating technical book clubs.

Jimmy is a member of the ASPInsiders group, the C# Insiders group, and received the "Microsoft Most Valuable Professional" (MVP) award for ASP.NET in 2009-2012. Jimmy is also the creator and lead developer of the popular OSS library AutoMapper.