When I worked for Grant Thornton in high school, I worked on several elements for their "United Voices for Equity" conference.
When I returned as a freelance designer, I was asked to create a handful of mock-ups for a potential logo. The company is no longer active, but while they were, they used design 1a.
During my last year with Grant Thornton I was asked to redesign the cover art for their podcast "FedHeads".