Windows Systems Administrator (12-month contract)

Nomura is seeking a Windows Systems Administrator to join the Windows infrastructure sub‑group of our Global Digital Workspace team and contribute to infrastructure support for the Nomura Group affiliate company Instinet Incorporated. The Digital Workspace team provides engineering, maintenance and support for Instinet’s Windows, Active Directory, and VMware systems, globally. This role is primarily focused on the team’s responsibilities involving server administration, Active Directory vulnerability patching, VMware infrastructure maintenance, and other infrastructure services while other team members are assigned to focus on first‑level support for the desktop environment.

Essential Role Duties and Responsibilities:

• Active Directory vulnerability management
• Review vulnerabilities and available remedies
• Assess interoperability in a heterogeneous environment including legacy systems
• Manage deployment risk through log analysis, reporting and available controls
• Deploy, verify and support security patch and other vulnerability remediation tasks

VMware infrastructure support

• Build, upgrade and patch VMware ESXi systems
• Monitor and manage ESXi server capacity
• Develop and maintain relevant documentation and runbooks

Collaborate across Digital Workspace and technology infrastructure teams to support work required to relocate Instinet infrastructure to new data centre locations.

General Windows Server Systems Administration & Support

• Windows Server security patching
• Capacity and configuration management
• Installs, adds, changes and support

This position is focused on developing and supporting our global Windows Server infrastructure with a focus in Active Directory Management, VMware, Support Escalation and After Hours Change Implementation. In this role you will be responsible for developing, implementing and supporting technology solutions delivered to Instinet’s corporate users and production Windows environment in a global teamwork environment.

Minimum Technical Experience:

• Active Directory Administration
• Performing administrative tasks in a multi‑domain environment
• User & Computer Administration
• Group Policy management & troubleshooting
• Experience managing AD Sites & Services
• Working knowledge and understanding of DNS & DHCP

VMware

• Experience building, upgrading and managing ESXi v7.0, 8.0 and vCenter
• Experience managing VMware services and features including SRM, DRS and Update Manager
• Performance monitoring and alerting

General Windows Server Systems Administration

• Deployment, management & support for Windows Server 2012, 2019+ systems.
• Windows Server patching
• Technical support for issues escalated from internal support groups and development teams
• Experience supporting a production environment, with change control procedures and after hours implementation
• Experience using a service‑based ticketing system (e.g. Jira Service Desk, ServiceNow, etc.)
• Windows File System Management (e.g. Access Control Lists, DFS, File Share Management)

Preferred Technical Experience:

• Citrix XenDesktop / Citrix Virtual Apps & Desktops
• Citrix Director VDA installation, configuration and troubleshooting
• Knowledge of Citrix NetScaler ADC and ADM

Office 365

• Exchange Online administration
• Mailbox creation & user management
• SMTP header analysis and related messaging technologies

Experience administering a mobile messaging platform (e.g. Mobile Iron, Workspace ONE, etc.) Troubleshooting mobile connectivity errors Understanding of mobile messaging architecture.

Job Knowledge, Qualifications & Education:

• Previous experience in Systems Administration managing production Active Directory and VMware VCenter and ESX infrastructure, including support, deployment, maintenance, upgrades, monitoring and troubleshooting.
• Experience supporting a production environment, including the use of change control procedures.
• Excellent verbal and written communications skills, including the ability to listen actively, participate in group discussions and take accurate and thorough notes.
• Strong attention to detail with a focus on quality and thoroughness.
• Able to learn through new experiences and willing to ask for guidance or assistance when needed.
• Technical certifications in Microsoft technologies, IT security and networking a plus.

Explore Insights & Vision

Identify the underlying causes of problems faced by you or your team and define a clear vision and direction for the future.

Making Strategic Decisions

Evaluate all the options for resolving the problems and effectively prioritize actions or recommendations. Inspire team members through effective communication of ideas and motivate them to actively enhance productivity.

Elevate Organizational Capability

Engage proactively in professional development and enhance team productivity through the promotion of knowledge sharing.

Inclusion

Respect DEI, foster a culture of psychological safety in the workplace and cultivate a "Risk Culture" (Challenge, Escalate and Respect).

Nomura Diversity Statement

Nomura is committed to an employment policy of equal opportunities and is fundamentally opposed to any less favourable treatment accorded to existing or potential members of staff on the grounds of race, creed, colour, nationality, disability, marital status, pregnancy, gender or sexual orientation. If you require any assistance or reasonable adjustments due to a disability or long‑term health condition, please do not hesitate to contact us. Nomura is an Equal Opportunity Employer.