Well, at least part of your job description. As I like to remind Christians, some, but not all, are called to be evangelists.
Ephesians 4:11 (ESV) And he gave the apostles, the prophets, the evangelists, the shepherds and teachers . . .
So you may or may not be an evangelist. But all are called to be ambassadors . . .
2 Corinthians 5:20 We are therefore Christ’s ambassadors, as though God were making his appeal through us. We implore you on Christ’s behalf: Be reconciled to God.
. . . and all are called to be defenders of the faith (“apologists”).
1 Peter 3:15–16 (ESV) but in your hearts honor Christ the Lord as holy, always being prepared to make a defense to anyone who asks you for a reason for the hope that is in you; yet do it with gentleness and respect, having a good conscience, so that, when you are slandered, those who revile your good behavior in Christ may be put to shame.
So if you claim the name of Christ you may or may not be an evangelist, but you are definitely an apologist and an ambassador. The only question is whether you are doing a good job. You will be very glad when God uses your efforts to be able to share his truths with someone who is seeking them.
As the Wintery Knight asks, Can you dispense with apologetics and just preach the gospel when evangelizing? I think they are intertwined, especially in our culture. If you don’t subscribe to his blog you should start.
See the Apologetics links to the right for some great resources. If I could only recommend one site it would be Stand to Reason. Scour the site, listen to the Podcast and read Tactics: A Game Plan for Discussing Your Christian Convictions and you’ll be in great shape. CARM.org is, great, too.
Also see these PowerPoint slides that I have used for a class at church called Defending Your Faith. You are welcome to use or adapt them. Now get to work!