Senior Systems & Network Engineer – L3

This is a fully remote position, open to applicants in Philippines.

📋 Description

• The **Senior Systems & Network Engineer (L3)** acts as the primary technical escalation point for intricate infrastructure, cloud, network, and security challenges across various client environments. This position is accountable for designing, implementing, optimizing, and supporting enterprise-grade IT infrastructure, ensuring high availability, security, scalability, and operational excellence.

• As an L3 Engineer, you will spearhead complex troubleshooting initiatives, conduct in-depth root cause analysis (RCA), and pursue long-term solutions instead of temporary fixes. You will work alongside internal engineering teams, mentor junior engineers, and engage in infrastructure modernization projects that encompass Microsoft 365, Azure, VMware, networking, cybersecurity, disaster recovery, and automation.

• This role demands outstanding technical knowledge, strong analytical capabilities, and the capacity to manage multiple enterprise environments within a Managed Service Provider (MSP) framework.

• Key Responsibilities Infrastructure Engineering

• - Design, implement, and sustain enterprise Windows Server environments (2012–2025).

• - Architect and oversee Active Directory, Azure Active Directory (Entra ID), DNS, DHCP, DFS, PKI, Certificate Services, File Services, and Group Policy.

• - Design and manage hybrid Microsoft 365 and Azure environments.

• - Plan and execute infrastructure upgrades, migrations, consolidations, and modernization projects.

• - Conduct capacity planning, performance tuning, and infrastructure optimization.

• Enterprise Networking

• - Design, deploy, and troubleshoot enterprise LAN, WAN, SD-WAN, VLANs, VPNs, routing, switching, wireless networks, and high-availability architectures.

• - Configure and support Cisco, Meraki, SonicWall, Fortinet, Palo Alto, Ubiquiti, and similar enterprise networking platforms.

• - Troubleshoot complex routing protocols, VPN tunnels, firewall policies, NAT, ACLs, QoS, and network segmentation.

• - Support multi-site and Site-to-Site VPN environments.

• Microsoft Technologies

• - Administer Microsoft 365, Exchange Online, SharePoint Online, Teams, OneDrive, Defender, and Intune.

• - Design Conditional Access policies, MFA, Autopilot deployments, compliance policies, and endpoint security.

• - Conduct advanced Exchange administration, including hybrid Exchange environments.

• - Design and manage enterprise Group Policy Objects (GPOs) and security baselines.

• Virtualization & Cloud

• - Design and manage VMware vSphere, ESXi, vCenter, Hyper-V, and clustered virtualization environments.

• - Oversee storage, snapshots, HA, DRS, vMotion, replication, and virtual networking.

• - Design and support Microsoft Azure infrastructure, including virtual networks, virtual machines, storage, identity, backup, monitoring, and governance.

• - Assist with cloud migration and hybrid cloud initiatives.

• Security & Compliance

• - Implement Zero Trust security principles and best practices for identity management.

• - Configure Microsoft Defender, Sentinel, Azure Security Center, Conditional Access, and endpoint security solutions.

• - Conduct vulnerability assessments, security remediation, patch management, and hardening activities.

• - Investigate security incidents and support incident response and remediation efforts.

• - Ensure compliance with industry standards and security best practices.

• Backup & Disaster Recovery

• - Design and maintain backup and disaster recovery solutions using Veeam, Datto, Barracuda, Azure Backup, and similar technologies.

• - Conduct backup validation, recovery testing, replication monitoring, and disaster recovery planning.

• - Carry out periodic recovery drills and document recovery procedures.

• Automation & Process Improvement

• - Develop automation scripts using PowerShell and other scripting technologies.

• - Enhance operational efficiency through automation, standardization, and process optimization.

• - Create documentation, knowledge base articles, SOPs, and infrastructure standards.

• - Identify recurring issues and implement lasting corrective actions.

• Troubleshooting & Escalations

• - Act as the final escalation point for complex infrastructure, networking, virtualization, and cloud issues.

• - Conduct advanced Root Cause Analysis (RCA) and implement permanent solutions.

• - Lead major incident investigations and post-incident reviews.

• - Coordinate with vendors, Microsoft, hardware manufacturers, ISPs, and third-party providers during critical incidents.

• Leadership & Collaboration

• - Mentor and coach L1 and L2 engineers through technical guidance and knowledge sharing.

• - Participate in technical reviews, project planning, and change management.

• - Collaborate with cross-functional teams to complete infrastructure projects on schedule.

• - Maintain accurate technical documentation and ensure compliance with ITIL best practices.

⛳️ Requirements

• - Bachelor’s degree in Computer Science, Information Technology, Engineering, or a related field (or equivalent professional experience).

• - 5–8+ years of experience in Systems Administration, Network Engineering, Infrastructure Engineering, or a senior MSP setting.

• - Extensive experience supporting enterprise-level Microsoft, networking, virtualization, and cloud technologies.

• - Strong experience working within Managed Service Provider (MSP) environments supporting multiple clients.

🏝️ Benefits

• - 🏥 HMO Coverage

• - 📋 Government-Mandated Benefits (SSS, PhilHealth, Pag-IBIG, 13th Month Pay)

• - 🏠 Work-From-Home Setup

• - 🌍 Work with International Clients and Enterprise Environments

• - 🚀 Career Growth & Leadership Opportunities

• - 📈 Continuous Technical Training & Certification Support

• - 🤝 Collaborative Engineering Culture

• - 💻 Company Equipment Provided (after 3 months)