Does Romans 10:9 require a person to give a public testimony before the congregation to be recognized as a believer?

Les explains Paul's words in Romans 10:9 as saying, in effect, that if you will confess with your mouth that Jesus is Lord. He does not agree with Lordship Salvation, feeling it smacks of works. But when a person enters in by faith, experiences the new birth, becomes a child of God, is forgiven, sanctified, glorified, baptized into the Body, and indwelt by the Holy Spirit, then Christ becomes Lord of that life. That follows as naturally as daylight follows dark. Les recalls being associated with a situation where, before anyone could be recognized as a believer or a candidate for church membership, they had to go in front of the whole congregation and tell their testimony. This was the verse used. Les does not feel that is what the verse is saying. It is not saying that to be proclaimed as a believer you must get up in front of a congregation of 300–400 people and give your testimony; that is not what the book says. But when you have entered into a salvation experience, you will not keep it to yourself.