I have been doing Linux System Administration for over 20 years. I have administered and developed mail servers, web servers, routers, firewalls, proxies, file servers and embedded devices running Linux.
Strong Linux and system administration skills, familiarity with all the technologies required to complete the task. Strong grasp of mail servers, mail flow, Linux security and email security.
Can advise on SPF, DKIM and DMARC configuration for your mail servers and domains to enhance the reputation of your (legitimate) emails and improve deliverability.
I *AM* the person for this job. You will get clear communication and prompt, professional service.