Senior IT Systems Engineer

About this role

Who is Nexxen?

Flexible advertising, unified by data. Nexxen empowers advertisers, agencies, publishers and broadcasters around the world to utilize data and advanced TV in the ways that are most meaningful to them. Our flexible and unified technology stack comprises a demand-side platform (“DSP”) and supply-side platform (“SSP”), with the Nexxen Data Platform at its core. With a global footprint, you can be part of a team that is transforming advertising through our creative, flexible, and unified solutions.

Why join the Nexxen team?
With a global footprint, you can be part of a team that is transforming advertising through creative, flexible, and unified solutions. Our employees live the Nexxen Way through the 3Cs: Customer Centric, Curious Mindset, and Collaborative with No Ego.

This role will be based in the New York City office. Our team follows a hybrid schedule working in-office three days a week and remotely for the rest. This is an exempt position.

Each day can be different here at Nexxen, but some of the things you can expect to be doing daily are:

The Role
The Senior IT Systems Engineer serves as a senior technical leader responsible for the design, administration, security, reliability, and operational excellence of Nexxen's enterprise technology platforms across cloud, SaaS, and on-premises environments. This role leads infrastructure strategy, drives modernization initiatives, strengthens security and compliance controls, and serves as a key escalation point for complex technical issues.

Working with substantial autonomy, the Senior IT Systems Engineer partners across business and technical teams to deliver highly available, secure, and scalable technology solutions while improving operational efficiency through automation, standardization, and process improvement.

What you will do

Infrastructure Engineering & Operations

- Design, implement, and support enterprise infrastructure across AWS, Azure, Microsoft 365, SaaS platforms, and on-premises environments.

- Lead infrastructure modernization, platform standardization, migration, and lifecycle management initiatives.

- Design and support highly available, scalable, and resilient systems, including disaster recovery and business continuity capabilities.

- Perform capacity planning, performance optimization, proactive monitoring, and operational health management.

- Lead complex troubleshooting efforts, root cause analysis, and post-incident remediation activities.

- Serve as the highest-level escalation point for infrastructure, networking, cloud, and identity-related issues.

Identity & Access Management

- Architect and administer Active Directory and Microsoft Entra ID environments.

- Lead enterprise identity initiatives including SSO, SCIM provisioning, MFA, and identity lifecycle management.

- Implement and maintain RBAC, privileged access controls, and least-privilege security models.

- Partner with application owners to integrate enterprise authentication and access governance solutions.

Microsoft 365, Automation & Collaboration

- Administer and optimize Microsoft 365 services including Exchange Online, SharePoint Online, Teams, and OneDrive.

- Develop automation solutions using PowerShell, Microsoft Graph, APIs, and cloud-native technologies.

- Implement AI-enabled operational efficiencies while maintaining governance, security, and compliance controls.

- Support and integrate enterprise collaboration platforms including Microsoft 365, Slack, and Jira Cloud.

Network & Security Engineering

- Administer and optimize enterprise network infrastructure, including Cisco Meraki and Palo Alto Prisma Access/GlobalProtect environments.

- Design and maintain secure remote access, VPN, segmentation, firewall, and network security architectures.

- Implement security controls across cloud, identity, endpoint, and network environments.

- Lead vulnerability management, patch management, endpoint protection, and remediation programs.

- Assess infrastructure and technology risks and recommend appropriate mitigation strategies.

Compliance, Governance & Operational Excellence

- Define and maintain backup, retention, recovery, logging, and business continuity standards.

- Support SOX, SOC 2, and other regulatory or audit requirements through control validation and documentation.

- Develop and maintain architecture documentation, runbooks, operational procedures, and engineering standards.

- Lead large-scale projects, technology migrations, integrations, and strategic initiatives.

- Mentor engineers and contribute to technical leadership, knowledge sharing, and continuous improvement efforts.

What you will bring

- 7+ years of experience in systems engineering, infrastructure engineering, or related enterprise IT roles.

- Demonstrated experience managing complex enterprise environments across cloud, SaaS, and on-premises platforms.

- Strong expertise with:

- AWS cloud infrastructure and services

- Microsoft 365 and Entra ID

- Active Directory and identity services

- VMware administration

- Enterprise networking, routing, switching, firewalls, VPNs, and high-availability architectures

- Experience implementing and supporting:

- SSO

- MFA

- SCIM provisioning

- RBAC and access governance

- Advanced PowerShell scripting and automation experience utilizing APIs and Microsoft Graph.

- Strong knowledge of cybersecurity principles, vulnerability management, risk management, and compliance frameworks.

- Experience leading infrastructure projects, migrations, and operational improvement initiatives.

- Proven ability to perform advanced troubleshooting and root cause analysis across infrastructure, networking, cloud, and SaaS technologies.

- Strong documentation, communication, and cross-functional collaboration skills.

Preferred Qualifications

- Industry certifications in AWS, Microsoft, VMware,…