There is no such thing as a career that is more “Christian” than another—every job is an opportunity to glorify God. The Bible teaches that whatever we do, we should work diligently and with integrity, as though we are serving Christ directly. Christians are called to be a light in the world, using their unique spiritual gifts to bless others in all types of work. God prepares different paths and purposes for each of us, and we honor Him by faithfully following His leading in our careers. As long as the work is moral and lawful, any career can become a platform for ministry when it is done with excellence, love, and a heart focused on Christ.
Rather than try to find a "Christian" career, we should seek to live out the fullness of who God has made us to be. For some, this may mean working in a ministry setting. For others, it may mean something completely different. Whatever career we choose through seeking God’s guidance, we should work diligently in a way that brings honor and glory to God. Wherever we are guided by God is a chance and place for us to bring the influence of Christ to those around us.
It should be mentioned that "careers" that are illegal or immoral, such as prostitution, dealing drugs, or work in the pornography industry, would be excluded. But aside from these and other immoral or illegal careers, Christians can consider most any career—attorney, actor, air traffic controller, baker, builder, counselor, child care worker, designer, doctor, engineer, entrepreneur, financial advisor, human resource officer, nurse, pilot, plumber, scientist, teacher, writer, stay-at-home mom, etc. The goal is to seek God's will for one's life, follow Him where He leads, and then do one's job in a way that brings Him honor and reflects His character.