Gmail SPF DNS & DMARC Implementation

I need an expert who can work on the SPF DNS and DMARC for Gmail. The main motive behind implementing it is to enhance the email deliverability of my domain. I have emails that are not being delivered and it's a problem. I require these email authentication methods for more than 10 email addresses associated with my domain.

Ideal Skills:
- Experience with Gmail's SPF DNS and DMARC
- Knowledge of email deliverability
- Ability to work with multiple email addresses

Key Tasks:
- Boosting email deliverability
- Implementing SPF DNS and DMARC for >10 emails