Personnel is working people.
We are personnel wherever and employer. If I am member in team and work there, I am personnel. Also, other member is same. If I establish my company and want to employ other people, I’m searching personnel.
Personnel is very important what you do. You have many personnel, you can work effectively. If I’m CEO and not good at Chinese, I have only to employ person can speak Chinese. In addition, I must pay money to him if I employ.
Contributor don’t participate in working in my team. But Contributor is person helping us. He can give money or support something. Also, I can be contributor and support various helping to other teams. In common, rich person is contributor when he gives donation. Beside money, people contributing their talent are contributor, too.
Bill gates contributes much money
Thefreedictionary : http://www.thefreedictionary.com/contributor
Dictionary : http://dictionary.reference.com/browse/contributor
Express personnel : http://caspersonnel.com.au/
Bill gates contributes much money : https://www.google.co.kr/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ved=0CAMQjxw&url=http%3A%2F%2F2proo.net%2F862&ei=2yvbVJPiOKGvmAWlnIGgAw&bvm=bv.85761416,d.dGY&psig=AFQjCNH6uLbovqO2p4YXS4pBwf-8T9LPVg&ust=1423736091011588&cad=rjt