Level 3 Infrastructure Engineer

Are you ready to grow your career at a values-driven, family first MSP? DTC is looking for their next Level 3 Infrastructure Engineer. The L3 Infrastructure Engineer will diagnose and resolve the most advanced incidents, designing stable and secure network architectures, and support field teams with expert-level guidance. This is a hybrid role based in Sparks, MD.

• Robust benefits package including PTO, 401k, healthcare, dental, and vision.
• Salary range of $110-130k annually.
• Hybrid work environment that supports work/life balance.
• Opportunities for continued growth, learning, and creativity.

• Network & Security Leadership:
  Act as the top escalation point for complex networking and firewall issues, leading design, deployment, optimization, and security hardening across multi-tenant environments.
• Advanced Incident Resolution:
  Resolve high-severity incidents as final escalation, perform root cause analysis, and drive long-term preventive and scalable solutions.
• Proactive Infrastructure Optimization:
  Monitor environments, implement preventive maintenance, improve alerting and baselines, and support automation for reliability, performance, and security.
• Client & Project Support:
  Serve as a senior technical contact for clients, contribute to system design and project execution, and support hybrid and cloud deployments.
• Team Enablement & Documentation:
  Mentor support teams, collaborate across departments, and maintain high-quality technical documentation and knowledge bases.

• 5+ years in IT systems administration or advanced support roles, with 2+ years in a Tier 3 escalation-level position, and at least 1 year of experience with a Managed Services Provider (MSP)
• Advanced networking and firewall experience, preferably with Ubiquiti/Uni Fi and Cisco.
• Strong knowledge of VLANs, routing protocols, VPN technologies, wireless design, and network diagnostics.
• Hands-on experience with virtualization platforms, cloud platforms (e.g., AWS, Azure), and RMM and MDM platforms.
• Familiarity with backup and disaster recovery tools (Veeam, Datto).
• Scripting abilities (Power Shell, Bash) for diagnostics and automation.
• Proactiveness, and comfort being in a leadership role. This role does not have direct reports, but is the most senior escalation point on the support team and is responsible for guiding and decision making on tough problems.
• Ability to participate in an on-call rotation.

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