Senior Systems & Network Engineer (L3)

Prime System Solutions

Philippines

On-site

PHP 900,000 - 1,500,000

Full time

3 days ago

Be an early applicant

A complete application in a minute

Tailored resume and cover letter, ready to send.

Get past ATS filters

Benefits offered by this job

HMO Coverage

Work-From-Home Setup

Career Growth & Certification Support

Government-Mandated Benefits (SSS, etc

Job summary

Prime System Solutions in the Philippines is seeking a Senior Systems & Network Engineer (L3) to act as the highest technical escalation point for enterprise IT across multiple client environments. You will design, implement, and support complex hybrid infrastructures, focusing on security, reliability, and automation.

Responsibilities span Windows Server, Active Directory, Azure, virtualization, networking, and cloud modernization.

Qualifications

Bachelor's degree in Computer Science, Information Technology, Engineering, or related field; equivalent professional experience.
5–8+ years of experience in Systems Administration, Network Engineering, Infrastructure Engineering, or a senior MSP environment.
Extensive experience with enterprise Microsoft, networking, virtualization, and cloud technologies and MSP environments.

Responsibilities

Design, implement, and maintain enterprise Windows Server environments (2012–2025).
Architect and manage Active Directory, Azure AD, DNS, DHCP, PKI, File Services, and Group Policy.
Design and administer hybrid Microsoft 365 and Azure environments.
Plan and execute infrastructure upgrades, migrations, and modernization projects.
Design, deploy, and troubleshoot enterprise LAN/WAN, VPNs, VLANs, and high-availability architectures.
Administer VMware vSphere/ESXi, Hyper-V, and clustered environments.
Manage backup and disaster recovery solutions (Veeam, Azure Backup, Datto).
Develop automation scripts using PowerShell and other scripting technologies.

Skills

Windows Server

Active Directory

Azure

VMware

Networking

PowerShell

Security

MSP experience

Education

Bachelor's degree in Computer Science, IT, Engineering

Tools

Cisco

Meraki

SonicWall

Fortinet

Palo Alto

Ubiquiti

Veeam

Datto

Job description

Senior Systems & Network Engineer (L3)

Company : Prime System Solutions
Job Type : Full Time
Location : Philippines

Job Description - Senior Systems & Network Engineer (L3)

Description

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 management.
Collaborate 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