Senior MSP Engineering: 15+ domains, security recovery, multi-client infrastructure

Problem

Fifteen-plus client domains, all different stacks, risk profiles, support maturity, and infrastructure weaknesses. The work required fast diagnosis, careful prioritization, and practical fixes that improved uptime, security, and supportability — without disrupting the day-to-day business in any of the environments.

Constraints

• Multiple clients and competing priorities at the same time.
• Limited outage windows; cutovers had to be staged.
• Security improvements had to be practical, not theoretical — recommendations that actually got implemented.
• Documentation and repeatable support processes had to improve while active support work continued.
• Business owners needed clear risk explanations, not technical noise.

Role

Senior escalation engineer and network security engineer at Uptime Ontime LLC. Responsible for advanced troubleshooting, infrastructure projects, security recovery, documentation, vendor coordination, and mentoring junior technicians.

What I did

• Supported 15+ client domains across servers, networks, Microsoft 365, Active Directory, firewalls, VPNs, endpoints, backups, and cloud services.
• Maintained highly available client environments with 500+ days of uptime.
• Recovered compromised environments and implemented enterprise-wide security controls after incidents.
• Led security initiatives aligned with HIPAA, NIST, and FTC requirements.
• Acted as the escalation point for network outages, DNS / DHCP issues, identity and access incidents, email delivery problems, endpoint security events, and server failures.
• Migrated client phone systems from analog to VoIP, including vendor coordination and end-user transition.
• Improved documentation, repeatable support processes, backup validation, access controls, MFA rollouts, endpoint security, and patching practices.
• Resolved advanced service desk escalations and mentored junior technicians on the path to senior work.
• Worked directly with business owners, executives, vendors, and end users — defining needs and communicating risk in language each audience could act on.

Outcome

• Stronger infrastructure reliability across the client portfolio.
• Improved security posture across multiple environments — including post-incident hardening.
• Better escalation handling and documentation that survived the engineers who set it up.
• More repeatable support operations and a smoother on-ramp for junior staff.
• Six years of exposure to many real-world stacks — not just one company’s environment.

What it demonstrates

The ability to operate under pressure across diverse infrastructure environments, recover from security incidents, mentor technical staff, communicate with business leaders, and improve reliability across messy real-world systems — the core competencies for senior systems / network engineering and IT leadership work.