Senior Network Administrator

Holt Renfrew offers you an inspiring, fashion-driven environment with opportunities to learn and grow. From our incredible partnerships with iconic luxury brands, to our commitments to corporate social responsibility, you will be inspired every day.A job at Holt Renfrew offers a competitive total compensation, a generous employee discount, pension, and health & dental benefits, tuition assistance, and continuous learning and development.The **Senior Network Administrator** maintains and supports the network for 24 hours, 7 days a week availability. The Senior Network Administrator - Security role is responsible for protecting our critical information assets and brand reputation via number of security technologies, process and governance. The role will ensure compliance with corporate and regulatory policies/standards & industry best practices, enhancing and enabling business initiatives.**Key Responsibilities:****Infrastructure Operations & Maintenance*** Maintain and administer on-premises and cloud-based infrastructure, including Windows and Linux servers, storage platforms, virtualization environments, and data centre/store virtual server estates.* Manage cloud email and collaboration platforms (e.g., Microsoft Exchange Online / M365), including configuration, security, and day-to-day operations.* Monitor system performance, capacity, and availability; respond to alerts and proactively tune systems to prevent service degradation and outages.* Perform regular system updates, patching, and firmware upgrades in alignment with formal change-management practices and maintenance windows.* Collaborate with network teams for switches, firewalls, VPNs, Wi-Fi, and secure remote access for staff and vendors.**Identity & Access Management*** Design, operate, and secure enterprise-wide identity platforms, including Active Directory, Azure AD, LDAP and related directory services.* Administer user and service accounts, groups, and security roles across identity platforms and business applications, ensuring least-privilege access.* Manage access provisioning and de-provisioning via identity management systems, including creation, issuance, review, and monitoring of user profiles, passwords, and access codes.* Protect systems by defining and enforcing access privileges, control structures, and segregation of duties, and by ensuring appropriate approvals, attestation, and periodic access reviews.**Security Architecture, Engineering & Governance*** Serve as a subject matter expert (SME) in information security, combining strong technical depth with business acumen to provide security assurance across the IT environment.* Develop, maintain, and continuously improve security technologies, processes, and governance frameworks to support a proactive security posture and the organization’s information security roadmap.* Implement and maintain baseline security configurations (system hardening, secure protocols, endpoint and server protection, encryption, and least-privilege models).* Enforce security governance by administering and tuning security technologies such as IPS/IDS, firewalls, endpoint protection/EDR, server patching tools, DLP, proxy and email filtering, and identity/security logging solutions.* Participate in Demand Intake, Architecture Review Board (ARB), and Change Advisory Board (CAB) meetings, providing security guidance, reviewing proposed solutions, and ensuring designs align with industry best practices and are sustainable.* Contribute security requirements and risk perspectives to IT and business projects, acting as the resident Security Specialist from design through implementation.**Security Monitoring, Incident Response & Problem Management*** Safeguard information system assets by identifying, analyzing, and resolving potential and actual security problems in a timely manner.* Investigate, triage, and respond to security alerts, violations, and exceptions to established controls, determining when issues should be escalated into formal incident management processes.* Provide timely incident resolution in line with SLA objectives, including clear communication, documentation of actions taken, and knowledge transfer to support teams.* Perform root-cause analysis for major security and infrastructure incidents and implement corrective and preventive measures to reduce recurrence.* Provide Tier 2 / Tier 3 support for complex infrastructure and security issues escalated by the service desk or business units.* Provide after-hours and on-call emergency security and infrastructure support as required by operational procedures.**Threat Intelligence, Risk & Compliance*** Stay current with information security trends, threat intelligence, intrusion techniques, vulnerabilities, and social engineering methods; translate this knowledge into practical controls and risk advice for the organization.* Assist with vulnerability management and remediation by applying patches, configuration changes, and compensating controls in coordination with security and infrastructure teams.* Ensure adherence to internal policies and relevant standards and regulations (e.g., password policies, data handling guidelines, access review requirements, PCI or similar frameworks where applicable).* Work with internal and external auditors to provide evidence, respond to findings, and lead or support remediation activities.* Identify security violations, control gaps, and process inefficiencies through periodic reviews and audits, and drive closure of gaps identified by third-party assessments, penetration tests, and vulnerability scans.**Backup, Recovery & Business Continuity*** Design, configure, and monitor backup and recovery solutions for servers, applications, and critical data across data centre and distributed environments.* Maintain and optimize backup/restore infrastructure, including off-site and disaster-recovery capabilities, to meet defined RPO/RTO targets.* Conduct regular backup verification and restore tests to validate recoverability and compliance with business continuity objectives.* Contribute to disaster recovery (DR) and business continuity planning, documentation, and periodic exercises, ensuring that infrastructure and security controls support agreed recovery strategies.**Documentation, Knowledge Management & Continuous Improvement*** Create and maintain up-to-date technical documentation for systems, configurations, security controls, procedures, architecture diagrams, and operational runbooks.* Develop and maintain security and operational process/procedure documentation to support consistent execution and onboarding of new team members.* Identify recurring incidents and inefficiencies, and propose automation, tooling, or process improvements to enhance stability, security, and operational efficiency.* Maintain professional and technical knowledge by attending educational workshops, reviewing relevant publications, and collaborating with internal and external security stakeholders and leadership.**The ideal candidate:*** Information Technology Degree/Diploma* MCSE Certified* CISSP (Certified Information Systems Security Professional) designation or actively in pursuit* CISM (Certified Information Security Manager) designation or actively in pursuit* Advanced knowledge of Active Directory, virtual server technologies (Hyper-V), Microsoft Server platforms, MS Exchange, backup technologies, network protocols/firewalls, Microsoft System Center Configuration Manager and best security practices and compliance rules and other identity and access management technologies* Be fully knowledgeable with practices and related tools for Data Centre Management and IT Operation functions (including ITIL, ITSM, and Change Management)* Have strong customer focus and relationship management skills* Have advanced technical skills for technology infrastructure management (including WAN, LAN, Server, Network Management,#J-18808-Ljbffr