No matter who your boss is, you are really working for God.
"22 Slaves, obey your earthly masters in everything. Don't do it just to please them when they are watching you. Obey them with an honest heart. Do it out of respect for the Lord. 23 Work at everything you do with all your heart. Work as if you were working for the Lord, not for human masters. 24 Work because you know that you will finally receive as a reward what the Lord wants you to have. You are serving the Lord Christ." (Col 3:22-24, NIrV).
This above verse shows that as much as apostles, prophets, evangelists, pastors and teachers work for God and receive a reward, equally those who work for various corporations, businesses, educational institutions, etc also work for the Lord and will receive a reward for their service. In other words, you are placed as a christian in a secular environment so that you can be a witness, testimony and a great example of the life of God working within you. This will attract others to follow Jesus and live like you do. If you are living like this, sure the reward for you is already being added up on your account in heaven by our Lord Jesus Himself. As much as a minister of the word of God serves Christ, you who work in the market places also equally serve Christ and both have rewards according to the faithful continuance of their work till death do us part from the planet earth. Praise the Lord!