Sr. Systems Administrator

Brown & Riding; Los Angeles (CA); On-site; USD 120,000 - 180,000; Full time

Job summary

Brown and Riding in Los Angeles seeks an experienced Senior Systems Administrator to support, maintain, and enhance our enterprise technology infrastructure.

This senior role focuses on reliability, security, performance, and scalability across critical systems, working with Windows/AD, virtualization, storage, cloud services, identity management, and cybersecurity.

Qualifications

• Bachelor's degree in Information Technology, Computer Science, or related field.
• 8+ years of experience administering enterprise infrastructure environments.
• Advanced experience with VMware, Microsoft server technologies, and enterprise storage platforms.
• Experience managing Storage Area Networks (SAN), storage arrays, replication technologies, and large-scale data environments.
• Microsoft, VMware, Cisco, Veeam, Fortinet or security-related certifications are highly desirable.
• Experience supporting hybrid cloud environments, including Microsoft Azure and AWS.
• Strong knowledge of cybersecurity frameworks, compliance requirements, and risk management practices.
• Exceptional troubleshooting, project management, and communication skills.

Responsibilities

• Design, implement, and maintain highly available server, storage, and virtualization environments.
• Administer and optimize storage infrastructure, including SAN technologies, storage allocation, performance tuning, replication, and capacity planning.
• Manage enterprise backup, recovery, business continuity, and disaster recovery solutions.
• Administer Microsoft Exchange, Microsoft 365, Entra ID, and Active Directory environments.
• Monitor infrastructure health, performance, security, and system capacity.
• Maintain and secure network infrastructure, including switches, firewalls, VPNs, and related technologies.
• Lead infrastructure upgrades, migrations, and modernization projects.
• Implement and maintain security controls aligned with industry best practices.
• Troubleshoot complex infrastructure, networking, storage, and application issues.
• Develop technical documentation, standards, procedures, and architectural diagrams.
• Mentor junior IT staff and serve as an escalation point for advanced technical issues.

Skills

Windows Server Administration

Active Directory

DNS

DHCP

Group Policy

Microsoft Exchange Server

Entra ID

VMware vSphere/ESXi

Veeam Backup & Replication

SAN storage

Data protection & DR

networking (TCP/IP, VPNs, Firewalls)

Microsoft 365 administration

PowerShell scripting

Cybersecurity

Education

Bachelor's degree in Information Technology/Computer Science

Tools

VMware vSphere

ESXi

Veeam Backup & Replication

SAN storage

Microsoft Exchange Server

Microsoft 365

Job description

Brown and Riding is seeking an experienced Senior Systems Administrator to support, maintain, and enhance our enterprise technology infrastructure. This is a senior-level technical role responsible for ensuring the reliability, security, performance, and scalability of critical business systems across our organization.

The ideal candidate will possess deep technical expertise across server infrastructure, virtualization, storage, networking, cloud services, identity management, and cybersecurity. This individual will serve as a key member of the IT team reporting to the CTO and play a critical role in infrastructure planning, implementation, troubleshooting, and modernization initiatives.

Core Technical Requirements

• Windows Server Administration
• Active Directory, DNS, DHCP, and Group Policy
• Microsoft Exchange Server and Exchange Online
• Microsoft Entra ID and Identity Governance
• VMware vSphere, ESXi, and virtual infrastructure management
• Veeam Backup & Replication
• Storage Area Networks (SAN), enterprise storage platforms, and data lifecycle management
• Data protection, retention, replication, and disaster recovery strategies
• Enterprise networking including TCP/IP, routing, switching, VPNs, firewalls, and wireless technologies
• Microsoft 365 administration and security
• Endpoint management and infrastructure automation
• Cybersecurity, vulnerability management, incident response, and security best practices
• PowerShell scripting and automation

Key Responsibilities

• Design, implement, and maintain highly available server, storage, and virtualization environments.
• Administer and optimize storage infrastructure, including SAN technologies, storage allocation, performance tuning, replication, and capacity planning.
• Manage enterprise backup, recovery, business continuity, and disaster recovery solutions.
• Administer Microsoft Exchange, Microsoft 365, Entra ID, and Active Directory environments.
• Monitor infrastructure health, performance, security, and system capacity.
• Maintain and secure network infrastructure, including switches, firewalls, VPNs, and related technologies.
• Lead infrastructure upgrades, migrations, and modernization projects.
• Implement and maintain security controls aligned with industry best practices.
• Troubleshoot complex infrastructure, networking, storage, and application issues.
• Develop technical documentation, standards, procedures, and architectural diagrams.
• Mentor junior IT staff and serve as an escalation point for advanced technical issues.

Preferred Qualifications

• Bachelor's degree in Information Technology, Computer Science, or related field.
• 8+ years of experience administering enterprise infrastructure environments.
• Advanced experience with VMware, Microsoft server technologies, and enterprise storage platforms.
• Experience managing Storage Area Networks (SAN), storage arrays, replication technologies, and large-scale data environments.
• Microsoft, VMware, Cisco, Veeam, Fortinet or security-related certifications are highly desirable.
• Experience supporting hybrid cloud environments, including Microsoft Azure and AWS.
• Strong knowledge of cybersecurity frameworks, compliance requirements, and risk management practices.
• Exceptional troubleshooting, project management, and communication skills.

Why Join Brown & Riding

This is an opportunity to work in a highly collaborative environment where you will have direct impact on the design, security, and evolution of our enterprise technology platform. The Senior Systems Administrator will be instrumental in supporting business growth while ensuring our infrastructure remains secure, resilient, and scalable.