Senior System Administrator

Confidential; Fairfield (CA); On-site; USD 100,000 - 130,000; Full time

Job summary

A dynamic technology organization in California is seeking a Senior Technical professional to manage systems administration and network infrastructure. The ideal candidate will have over 5 years of experience with expertise in Windows Server and Azure cloud environments, along with strong capabilities in problem-solving and communication. Responsibilities include managing daily service requests, ensuring compliance with SLAs, and developing technical documentation. This is a leadership position that demands a high level of technical proficiency and teamwork.

Qualifications

• 5+ years of experience in a similar position.
• At least one certification in Windows Server, Microsoft Office 365, or Microsoft Azure.
• Strong ability to manage projects and technical documentation.

Responsibilities

• Responds to daily service requests using Service Now.
• Manages on-premises and cloud infrastructure for SLA compliance.
• Produces accurate technical documentation.

Skills

Rubrik Backup

Active Directory Domain Services

Microsoft 365 Services

Azure Cloud Services

Communication Skills

Problem-Solving Skills

Information Security & Compliance

Education

Computer Science Degree or equivalent certifications

Tools

Cisco UCS

VMware vSphere

Microsoft Endpoint Configuration Manager (MECM/SCCM)

Job description

This is a Senior Technical Position that requires the candidate to have extensive practical working experience in systems administration and in-depth understanding and knowledge of network operating systems administration including Server OS, Active Directory, DNS, PKI, Microsoft EndPoint Configuration Manager, Server Monitoring, M365, Entra ID and Azure Cloud admin. This is a leadership position that requires a high level of hands‑on experience in a primarily Windows Server and Azure cloud environment. Geographically, the network includes 6 cities, 4 Data Centers and multiple branch locations, as well as two Azure tenants. Along with other team members this position will be responsible for the day‑to‑day operational responsibilities for supporting and securing the computer, storage and cloud infrastructure. Our on‑premises computer environment is mainly Cisco UCS / HX products so recent experience should include working on converged or hyperconverged virtualization platform.

Duties and Responsibilities

• Responds to daily service requests or trouble calls using the Service Now Ticketing system.
• Ability to communicate effectively with people at various levels of technical knowledge, from end‑user to Executive management.
• Excellent diagnostic and problem‑solving skills to troubleshoot problems and find solutions,
• Responds promptly to service outages, able to identify issues, analyze and evaluate root causes, and provide solutions to ensure services are operating efficiently
• Manages on‑premises and cloud infrastructure to ensure SLAs and QOS are met.
• Ability to manage several projects simultaneously from design to implementation
• Managing all stages in life cycle of computer and storage hardware/software including implementation, testing, maintenance, upgrades/refresh, and decommissioning
• Responds to critical outages and after‑hours incidents as needed
• Using Visio or similar tools, documents system topology and provides drawings as needed
• Produces clear, concise, and accurate technical documentation in Service Now knowledgebase
• Manages asset inventory of computer and storage equipment
• Works with various IT Service towers to resolve complex issues and/or project support
• Manages Rubrik backup systems, Rubrik experience a must

Education and Experience

5+ years of experience in a similar position and/or any combination of education and experience that clearly demonstrates the ability to perform the job duties of the position. At least one of the following certifications: Computer Science Degree, MCP or equivalent role‑based certifications in Windows Server, Microsoft Office 365 or Microsoft Azure

Knowledge, Skills, and Abilities

• Expert level of experience in Rubrik Backup, Active Directory Domain Services, to include FSMO roles, AD Functional Level upgrades, Domain Trusts, AD Site & Subnets, DFS & SYSVOL replication, GPO optimization, ADMX upgrades, LDAP queries, Dynamic DNS, SPNs, ICACLs, etc.
• High level of expertise in Entra ID / Azure AD, to include Entra Connect, SAML & OIDC SSO, Conditional Access policies, Privilege Identity Management, PIV and FIDO2 Smartcard, etc.
• Strong working knowledge of Microsoft 365 Services to include Exchange Online, SharePoint, OneDrive, MS Teams, Dynamics, Power BI, etc.
• Strong working knowledge of Microsoft PKI, Certificate Authorities, Templates, CRL etc.
• Excellent knowledge and experience with Azure cloud services in IaaS, PaaS and SaaS scenarios.
• Hands on knowledge working with VMWare vSphere and VMWare ESXi hosts.
• Hands on experience working with Cisco UCS platform, including UCSM and HX connect.
• Working knowledge of Microsoft Endpoint Configuration Manager (MECM/SCCM) and Intune MDM hybrid device management.
• Working knowledge of Rubrik CDM and/or RSC data management platform.
• Very strong focus on Information Security & Compliance best practice
• Well‑versed in ITIL concepts for ITSM and ITOM.
• Knowledge of SolarWinds Orion Suite is desirable - able to leverage network management tools in the identification and response to incidents and faults.
• Experience with Packet capturing and protocol analysis (TCP, UDP, ICMP, packet dissection).
• Able to Work with department members and interface with resources from other groups, able to manage critical situations and maintain positive relationships with colleagues and clients
• Excellent verbal and written communication skills.
• Creating topology drawings in Visio and maintaining comprehensive system documentation.
• Participate in the problem investigation of major incidents related to network services, provide recommendations to improve reliability and availability, or reduce recovery time.
• Able to function as technical lead on multiple high‑profile projects, balancing priorities and managing multiple urgent time demands.