Christian podcasts?

That's great that you are listening to Christian podcasts at work. I am not sure what to recommend that is close to the preaching style of Steven Furtick's. Maybe Dr. Tony Evans.

A lot of Christian talk radio programs are syndicated as podcasts. You could look into that.

For example, Catholic Answers Live was pretty instrumental in helping me make up my mind to convert and it can be found on iTunes.

Core Christianity. White Horse Inn. Wretched Radio.

I tend to listen to podcasts through the app on my phone. Here's two Christian ones I'd recommend.

The Brant and Sherri Oddcast: Hosted by radio host Brant Hansen and his friend and producer, Sherri (whose last name I can't remember off the top of my head), this podcast features a lot of discussion about God's goodness and mercy. There's also some humor and animal-related news in there as well.

Cooper & Cary Have Words: James Cary is a preacher and comedy writer who lives in Somerset, England. Barry Cooper is an author and screenwriter who lives in Port Orange, Florida. Both are Christians with a deep love for God. This podcast deals with both current events and theology, and I enjoy it quite a bit.

I can't really listen to any because I am picky about what they ar teaching. Thankfully my church is working on turning all their services and what not into audio form so I can listen when I am out exercising and happen to miss church.