The only people ever baptized in the New Testament were those who had come to personal faith in Jesus Christ as Savior and Lord.  Because baptism "pictures" your experience of becoming a new person in Jesus, it makes sense that you should only be baptized after you have had this experience.
As you may know, many other traditions baptize infants upon their parents' faith.  This is a beautiful dedication of a child to God, but this practice has no New Testament precedent.  Dedicating a child to God is a wonderful commitment, but baptism is not the best biblical means to accomplish it.  In the Bible, people are baptized only after they have made a personal commitment to Christ as Savior and Lord.
So, what is our church's practice regarding receiving into membership people who have been baptized in other churches?   If your baptism followed your personal salvation experience, and was done by immersion, we would certainly add no other requirements.  Typically, one of our staff ministers would talk with you regarding your faith and baptism experience, and prepare you to join our fellowship. 
If you have not been baptized by immersion as a believer, we would like to share this ministry with you.  This is not a legalistic requirement for church membership, but a biblical and public demonstration of your personal faith.  If you have been baptized as an infant, know that your immersion as a believer in no way invalidates the faith your parents demonstrated when they dedicated you to God.  Rather, it completes their dedication as you make their faith your own public commitment.
If you have further questions about the ministry and witness of baptism, please speak to one of our staff members.  We would be honored to help as you consider this vital and joyful witness of faith.