Senior Systems & Network Engineer (L3)

Prime System Solutions

Philippines

On-site

PHP 1,000,000 - 1,800,000

Full time

19 hours ago

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Benefits offered by this job

HMO Coverage

Work-From-Home Setup

Career Growth & Leadership

Job summary

Prime System Solutions is seeking a Senior Systems & Network Engineer (L3) to act as the highest technical escalation point for complex infrastructure, cloud, network, and security issues across multiple client environments. You will design, implement, and support enterprise IT while ensuring availability, security, and scalability.

You will lead root cause analysis, mentor junior engineers, and drive long-term solutions, collaborating with internal teams on modernization projects involving

Qualifications

Bachelors degree in CS/IT/Engineering or equivalent experience.
5–8+ years in Systems Administration, Network or Infrastructure Engineering in MSPs.
Experience with enterprise Microsoft, networking, virtualization and cloud.
MSP environment experience serving multiple clients.

Responsibilities

Serve as highest technical escalation for complex infrastructure, cloud, network, and security issues.
Lead troubleshooting, perform RCA, and drive permanent resolutions.
Mentor L1/L2 engineers and collaborate on projects.
Support modernization projects across Microsoft 365, Azure, VMware, and security.
Coordinate with vendors and Microsoft during critical incidents.

Skills

Root Cause Analysis

Mentoring

Technical leadership

Analytical thinking

Cross-functional collaboration

Problem solving

Education

Bachelor's degree in Computer Science or related

Tools

ConnectWise

Kaseya

Datto RMM

NinjaOne

N-able

IT Glue

ServiceNow

Job description

Intune
Microsoft Defender

The Senior Systems & Network Engineer (L3) serves as the highest technical escalation point for complex infrastructure, cloud, network, and security issues across multiple client environments. This role is responsible for designing, implementing, optimizing, and supporting enterprise-grade IT infrastructure while ensuring high availability, security, scalability, and operational excellence.

As an L3 Engineer, you will lead complex troubleshooting efforts, perform deep root cause analysis (RCA), and drive long-term solutions rather than temporary fixes. You will collaborate with internal engineering teams, mentor junior engineers, and participate in infrastructure modernization projects involving Microsoft 365, Azure, VMware, networking, cybersecurity, disaster recovery, and automation.

This role requires exceptional technical expertise, strong analytical skills, and the ability to manage multiple enterprise environments within a Managed Service Provider (MSP) setting.

Key Responsibilities

Infrastructure Engineering

Design, implement, and maintain enterprise Windows Server environments (2012-2025)
Architect and manage Active Directory, Azure Active Directory (Entra ID), DNS, DHCP, DFS, PKI, Certificate Services, File Services, and Group Policy
Design and administer hybrid Microsoft 365 and Azure environments
Plan and execute infrastructure upgrades, migrations, consolidations, and modernization projects
Perform 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
Perform advanced Exchange administration, including hybrid Exchange environments
Design and manage enterprise Group Policy Objects (GPOs) and security baselines

Virtualization & Cloud

Design and administer VMware vSphere, ESXi, vCenter, Hyper‑V, and clustered virtualization environments
Manage 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
Support cloud migration and hybrid cloud initiatives

Security & Compliance

Implement Zero Trust security principles and identity management best practices
Configure Microsoft Defender, Sentinel, Azure Security Center, Conditional Access, and endpoint security solutions
Perform vulnerability assessments, security remediation, patch management, and hardening activities
Investigate security incidents and assist with incident response and remediation
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
Perform backup validation, recovery testing, replication monitoring, and disaster recovery planning
Conduct periodic recovery drills and document recovery procedures

Automation & Process Improvement

Develop automation scripts using PowerShell and other scripting technologies
Improve operational efficiency through automation, standardization, and process optimization
Build documentation, knowledge base articles, SOPs, and infrastructure standards
Identify recurring issues and implement permanent corrective actions

Troubleshooting & Escalations

Serve as the final escalation point for complex infrastructure, networking, virtualization, and cloud issues
Perform advanced Root Cause Analysis (RCA) and implement permanent resolutions
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 managementCollaborate with cross-functional teams to deliver infrastructure projects on time
Maintain accurate technical documentation and ensure adherence to 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 environment
Extensive experience supporting enterprise-level Microsoft, networking, virtualization, and cloud technologies
Strong experience working in Managed Service Provider (MSP) environments supporting multiple clients

Technical Requirements

Microsoft Technologies