If you'd like someone to serve on your thesis committee, you should know how to ask them. After all, they probably won't have time to sign up for a committee right away. If they say no, they may be too busy or may have some personal issues with you, but they'll be there to evaluate your work in the future.
It's important to work with your mentor to choose committee members. You should ask them about different professors and listen to their advice about which ones might be the best fit for you. Professors often talk about each other, and they may mention you to their peers. Take note of how each professor reacts when you mention their name to them.
If you have a good relationship with your thesis committee chairman, you can approach him or her and ask for their help. By talking to your thesis committee chairman, you will get a second opinion and demonstrate that you're prepared to write your thesis o r go for thesis help service. It also shows that you trust their expertise and can work with others.
Before you approach someone about joining your thesis committee, you should do some research on them. Do some background checks on their CVs and research their past work. Find out if they have any research experience related to your subject.