Systems Administrator Sr
Confirmed on the employer's own hiring board on Nov 13, 2026. First seen by Alion on Nov 13, 2026. Dayforce scores B on the Alion truth index.
About the opportunity
The Senior Systems Engineer is responsible for the design, delivery, and operation of enterprise infrastructure supporting virtual desktop and application services. The role provides senior technical leadership for Omnissa Horizon 8 and related platform services across cloud and hybrid environments. This engineer ensures availability, performance, security, resiliency, and operational readiness while partnering with Cloud Hosting Operations, application, network, cybersecurity, and end-user computing teams.
Dayforce is a global human capital management (HCM) company headquartered in Toronto, Ontario, and Minneapolis, Minnesota, with operations across North America, Europe, the Middle East, and Africa (EMEA), and the Asia Pacific Japan (APJ) region. Our award-winning Cloud HCM platform offers a unified solution database and continuous calculation engine, driving efficiency, productivity, and compliance for the global workforce. Our brand promise – Makes Work Life Better™ – reflects our commitment to employees, customers, partners, and communities globally.
Location: This role is remote and can be performed in Canada or the United States.
What you’ll get to do
Horizon Platform Engineering: Design, implement, administer, and support Omnissa Horizon 8 virtual desktop and published application environments.
Horizon Architecture: Own the lifecycle and configuration of Horizon Connection Servers, Unified Access Gateways, Horizon Agents, desktop pools, application pools, entitlements, and policies.
Infrastructure Integration: Integrate Horizon with VMware vSphere, Active Directory, DNS, certificates, load balancing, storage, network services, and cloud infrastructure.
Availability and Recovery: Design and validate high-availability, backup, disaster recovery, and capacity strategies for Horizon and supporting infrastructure.
Performance and User Experience: Monitor platform health, session performance, logon times, capacity, and user experience; resolve root causes and improve service reliability.
Security and Compliance: Apply secure access, least-privilege, network segmentation, certificate, logging, vulnerability remediation, and hardening controls.
Automation and Lifecycle Management: Automate configuration, deployment, image lifecycle, and operational tasks through PowerShell, REST APIs, Terraform, Ansible, or equivalent tools.
Incident Leadership: Lead technical troubleshooting for complex infrastructure incidents, provide escalation support, and complete root cause analysis and corrective actions.
Cloud Infrastructure Operations and Technical Leadership: Operate Azure, AWS, Windows Server, VMware, and supporting infrastructure services; define standards, mentor engineers, maintain documentation, and coordinate change and maintenance activities.
Skills and experience we value
Bachelor’s degree in Computer Science, Information Technology, or a related field, or equivalent experience.
Seven or more years of progressive systems engineering or infrastructure operations experience in enterprise production environments.
Demonstrated hands-on experience designing, implementing, and operating Omnissa Horizon 8 or VMware Horizon environments.
Strong experience with Horizon Connection Server, Unified Access Gateway, Horizon Agent, desktop pools, published applications, and entitlements.
Strong experience with VMware vSphere, AWS, Azure, Windows Server, Active Directory, Group Policy, DNS, and certificate management.
Strong understanding of TCP/IP, DNS, VPN, load balancing, firewall policy, secure remote access, and troubleshooting across virtual desktop protocols.
Experience with enterprise storage, backup, recovery, and disaster recovery services for cloud and hybrid infrastructure.
Experience with monitoring, alerting, logging, performance analysis, capacity planning, and availability management in a 24x7 environment.
Experience with automation and infrastructure-as-code using PowerShell, REST APIs, Terraform, Ansible, or comparable tools.
Demonstrated ability to lead complex incident response, root cause analysis, change implementation, and technical problem resolution.
Strong communication, documentation, stakeholder management, and technical leadership skills.
What would make you stand out
Omnissa Horizon, VMware, Microsoft, AWS, or Azure certification is an asset.
Familiarity with SOC 2, ISO 27001, HIPAA, or similar security and compliance requirements is an asset.