I would like to know we can use forged certificates for any job?

Praise be to Allah, the Lord of the World; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.

Everyone who is qualified and capable to work in a given field is permitted to practise according to his specialization and his knowledge, even if he does not have degree. If working without having certificate is permitted in religious matter such as teaching Shari'a, giving Fatwa and other subjects related to Shari'a then doing so is more appropriate in worldly matters. These days people rely upon certificates to attest to a person's qualifications, thus it is not permitted to cheat or deceive them. The Prophet (Sallallahu Alaihi wa Sallam) said: "He who deceives is not of me" [Reported by Imam Muslim ].
Know that if having genuine certificate is a condition to be accepted for work then it is not permissible to provide a forged certificate. If the people you want to work with consider the certificate a symbolic matter and experience is what is important for them, then you are allowed to work there.
Allah knows best.