Certification attestation is required to prove the authenticity to apply for qatar employment visa.

you need follow this process for attestation in india:
1) get it attested from Mantralaya and
2) get it attested from Qatar embassy in india.

there are plenty of agents who can do this from india. if you do it personally it will 2-3 days max.

i could tell you this because my husband did it for his degree.