Senior Data Center & Network Engineer

About the Role We are looking for an experienced Data Center Technician to join our growing team and support complex, multi-tenant data center environments. This role is ideal for a hands-on infrastructure professional with strong experience in networking, firewall administration, virtualization, and server infrastructure. You will be responsible for deploying, maintaining, securing, and troubleshooting customer and internal infrastructure across shared data center environments. In addition to hands-on infrastructure support, you will serve as a Level 3 technical escalation resource, helping resolve complex issues, supporting Service Desk technicians, and improving the reliability and performance of our systems. The ideal candidate is a strong problem-solver who can work independently, manage multiple customer environments, and provide advanced technical support in a fast-paced environment. Key Responsibilities Network & Firewall Administration - Configure, manage, and troubleshoot enterprise firewalls, including Fortinet FortiGate, SonicWall, Palo Alto, and Cisco Firepower/ASA. - Configure and maintain VLANs, trunk ports, Layer 2/Layer 3 networking, routing, switching, and network segmentation. - Implement and support site-to-site and multi-site VPNs. - Manage firewall policies, NAT rules, routing configurations, and virtual firewall environments, including VDOMs. - Maintain secure, reliable, and high-performing multi-tenant network environments. - Perform firmware upgrades, security updates, and network troubleshooting. Virtualization & Server Infrastructure - Deploy, manage, and troubleshoot VMware vSphere/ESXi and Microsoft Hyper-V environments. - Create and maintain virtual machines, templates, virtual networking, and storage configurations. - Perform host upgrades, migrations, maintenance, and performance monitoring. - Support Windows Server, Active Directory, DNS, and DHCP. - Troubleshoot physical server hardware, storage systems, and infrastructure performance issues. - Assist with backup, disaster recovery, and business continuity initiatives. Data Center Operations - Rack, stack, cable, install, and decommission servers, switches, firewalls, and storage equipment. - Configure and maintain physical infrastructure across customer and internal environments. - Monitor hardware health and troubleshoot equipment issues. - Maintain accurate network diagrams, equipment inventories, and infrastructure documentation. - Participate in infrastructure upgrades, technical projects, and scheduled after-hours maintenance. Level 3 Technical Support - Serve as a Tier 3 escalation resource for Service Desk and NOC technicians. - Troubleshoot complex issues involving networking, firewalls, VPNs, virtualization, Windows Server, storage, and backups. - Provide technical guidance and mentorship to Level 1 and Level 2 technicians. - Participate in major incident response, root cause analysis, and problem management. - Develop long-term solutions to prevent recurring technical issues. - Create and maintain technical documentation and knowledge base articles. Customer & Tenant Support - Support multiple customer environments within a shared data center infrastructure. - Diagnose and resolve complex infrastructure issues across networking, security, virtualization, and server platforms. - Work directly with customers and internal teams to implement solutions and resolve technical challenges. - Maintain a high level of customer service, system security, and technical accuracy. Required Qualifications - 5+ years of experience in data center operations, systems engineering, network engineering, an MSP, or enterprise infrastructure support. - Experience supporting multi-tenant data center, shared hosting, or colocation environments. - Strong hands-on experience with enterprise firewalls, VLANs, routing, switching, and VPN technologies. - Experience with VDOMs, virtual firewalls, or network segmentation in multi-tenant environments. - Hands-on administration of VMware vSphere/ESXi and/or Microsoft Hyper-V. - Experience providing Tier 3 support or serving as an escalation resource in an MSP or enterprise environment. - Working knowledge of Windows Server, Active Directory, DNS, and DHCP. - Experience with physical server hardware and SAN/NAS storage systems. - Strong troubleshooting, analytical, and problem-solving skills. - Ability to interpret network diagrams and technical documentation. - Excellent communication skills and the ability to work independently while supporting a team. Preferred Qualifications - Experience with Fortinet FortiGate and other Fortinet products. - Cisco networking experience. - Experience with Dell, HPE, or Lenovo server platforms. - Background in shared hosting, colocation, or managed infrastructure services. - Knowledge of backup, disaster recovery, and business continuity solutions. - Familiarity with Microsoft Azure and/or AWS. - Relevant certifications, such as: - Fortinet FCP or NSE - VMware VCP - Cisco CCNA - Microsoft Hybrid Administrator - CompTIA Network+ What We're Looking For We're looking for someone who enjoys solving complex technical problems and takes ownership of the environments they support. The right candidate will be comfortable working across networking, security, virtualization, and physical infrastructure while serving as a trusted technical resource for the broader IT team. You should be organized, customer-focused, detail-oriented, and comfortable balancing project work with escalated support requests. What Success Looks Like - Maintaining secure, stable, and high-performing infrastructure across multiple customer environments. - Resolving complex technical escalations efficiently and effectively. - Ensuring network, firewall, and virtualization configurations are secure and properly documented. - Providing technical guidance and support to other IT technicians. - Identifying opportunities to improve infrastructure reliability, security, and operational efficiency.