IT Senior System Administrator

Partner ESI; Torrance (CA); On-site; USD 85,000 - 100,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Vision insurance

Vacation and sick time

401(k) plan with a company match

Job summary

Partner Engineering and Science, Inc is seeking a Senior IT System Administrator to support, secure, and improve its Microsoft-centered environment. The role requires hands-on experience with Microsoft 365, Teams, networking, security, and server infrastructure.

SharePoint and Power Platform are a plus. The ideal candidate solves problems, strengthens governance, and ensures reliability across cloud and on-premises systems.

Qualifications

• 5+ years of systems administration experience in a multi-office environment.
• 5+ years managing Microsoft environments and Microsoft 365 services.
• Strong knowledge of Windows Server, SMB, TCP/IP, DNS, DFS, and core networking.
• Experience administering Microsoft 365 services including Teams, SharePoint Online, Entra ID, licensing, security and compliance.
• Understanding of Teams, SharePoint Online, Power Platform, Copilot, Entra ID, and security/compliance capabilities.
• Experience with firewalls, routers, switches, SSL, VPN, IDS/IPS, endpoint security, and security frameworks.
• Knowledge of cloud services such as Azure and AWS.

Responsibilities

• Administer, maintain, and support cloud and on-premises infrastructure including servers, network devices, storage, and security devices.
• Manage Microsoft 365 services (SharePoint, Teams, Power Platform, Entra ID) and related licensing and security.
• Troubleshoot hardware, software, network, and end-user issues promptly and professionally.
• Analyze IT systems to identify improvements, automation, governance, and security opportunities.
• Plan infrastructure upgrades, patches, configurations, and security enhancements.
• Monitor performance, availability, and security to pre-empt issues.
• Support disaster recovery and business continuity planning.

Skills

Microsoft 365 administration

Windows Server & networking

Security & governance

SharePoint Online

Power Platform

VMware/Hyper-V

Azure/AWS familiarity

Troubleshooting

Documentation

Tools

Veeam

Meraki

PowerShell

SharePoint Online architecture

Job description

At PARTNER, success starts with the right mindset: connection, compassion, and curiosity. Whether consulting with clients or collaborating with colleagues, these principles guide how we work. We deliver engineering, environmental, and energy consulting, plus design services across the Americas, Europe, and beyond. As a leader in Commercial Real Estate (CRE), we’re 1,600+ professionals strong in 40+ offices. Our mission is simple: create the best home for talented professionals. If you value delivering exceptional experiences through problem-solving, coordination, and a mindset of care for clients and colleagues, you’ll feel right at home. That approach has earned us recognition on ENR’s Top 500 Design Firms, Inc. 5000’s Fastest-Growing Companies, and Zweig’s Best Firms to Work For. Here, your ideas matter, your impact is real, and your work helps shape the future. Check out this role and join our team of talented professionals.

Partner is seeking an experienced Senior IT System Administrator to support, secure, and improve its Microsoft-centered technology environment. This role requires strong hands-on experience with Microsoft 365, Teams, networking, security, and server infrastructure. Experience with SharePoint and Power Platform is a plus. The ideal candidate is a proactive problem solver who can troubleshoot complex issues, recommend practical solutions, strengthen governance, and help ensure the reliability, performance, and security of both cloud and on-premises systems.

ESSENTIAL DUTIES AND RESPONSIBILITIES

• Administer, maintain, and support cloud and on-premises infrastructure, including servers, network devices, storage, firewalls, switches, routers, and related systems.
• Manage Microsoft 365 services, including SharePoint, Teams, Power Platform, Entra ID, licensing, security, compliance, and collaboration tools.
• Troubleshoot and resolve hardware, software, network, communication, and end-user technology issues in a timely and professional manner.
• Analyze existing IT systems and processes to identify opportunities for improvement, automation, governance, security, and operational efficiency.
• Plan and implement infrastructure upgrades, system enhancements, patches, configuration changes, and security improvements.
• Monitor system performance, availability, and security to identify and address potential issues before they become critical.
• Support disaster recovery and business continuity planning to help ensure systems can recover from disruptions or outages.
• Maintain accurate documentation for infrastructure, assets, configurations, change control processes, and operational procedures.
• Collaborate with IT leadership, network administrators, cybersecurity resources, software developers, database administrators, vendors, and other stakeholders to deliver reliable technology services.
• Provide clear training, guidance, and support to end users to help them use technology systems and applications effectively.
• Stay current with emerging infrastructure, security, collaboration, and Microsoft 365 technologies, and recommend solutions that improve productivity and service quality.

KNOWLEDGE, SKILLS, AND ABILITIES

• Strong customer-service mindset with a professional, approachable, and solutions-oriented communication style.
• Ability to work independently and collaboratively with minimal supervision while managing priorities and meeting deadlines.
• High attention to detail, strong organizational skills, and a commitment to accurate, high-quality work.
• Strong analytical and problem-solving skills, with the ability to research technical issues and develop practical recommendations.
• Passion for continuous learning and staying current with evolving technologies, security practices, and infrastructure trends.

QUALIFICATIONS

• Minimum of 5 years of recent systems administration experience, preferably in a multi-office or geographically dispersed environment.
• 5+ years of hands-on experience managing Microsoft environments and Microsoft 365 products and services.
• Strong knowledge of Windows Server operating systems, Microsoft 365, SMB, TCP/IP, DNS, DFS, and core networking protocols.
• Experience administering Microsoft 365 services, including Teams, SharePoint Online, Entra ID, licensing, security, compliance, and collaboration platforms.
• Strong understanding of Microsoft Teams, SharePoint Online, Power Platform, Microsoft Copilot, Entra ID, Microsoft 365 licensing, and security and compliance capabilities.
• Experience with firewalls, routers, switches, SSL, TCP, VPN, IDS/IPS, endpoint security, and network security frameworks.
• Working knowledge of cybersecurity principles and Microsoft security technologies.
• Experience with storage arrays, backup solutions, off-site replication strategies, and disaster recovery planning.
• Experience with VMware or Hyper-V server virtualization.
• Knowledge of cloud services such as Microsoft Azure and AWS.
• Strong analytical, communication, and organizational skills, with the ability to work effectively with peers, clients, end users, and management.

Preferred Qualifications

• Experience with Veeam, Meraki, VMware, SharePoint Online architecture and administration, Microsoft Teams administration, Power Platform, Microsoft Copilot, and PowerShell scripting.
• Experience integrating Microsoft 365 with third-party enterprise systems.
• Knowledge of PowerShell scripting, automation, and process improvement.
• Microsoft certifications are preferred, such as Microsoft 365 Certified: Enterprise Administrator Expert, Microsoft Certified: Teams Administrator Associate, or Microsoft Certified: Power Platform Fundamentals.
• Flexibility to support urgent issues outside normal business hours when necessary; after-hours and weekend work are expected to be rare.

COMPENSATION

Salary range: $85,000 - $100,000. This is what we reasonably expect to pay for the role

The pay scale for this role considers a wide range of factors when making compensation decisions, including, but not limited to, skill sets, experience and training, licensure and certifications, and other business and organizational needs. Please note, the disclosed pay scale estimate has not been adjusted for the applicable geographic location where the position may be filled.

You may also be eligible to participate in a discretionary incentive bonus program which is dependent on various factors, including, but not limited to individual and organizational performance.

BENEFITS

• Health insurance
• Dental insurance
• Vision insurance
• Vacation and sick time
• 401(k) plan with a company match

It is Partner Engineering and Science, Inc's (The Company) policy is to provide equal employment opportunity for all applicants and employees. The company maintains a work environment that is free of harassment, discrimination, or retaliation based on an individual’s race (including, but not limited to, hair texture and protective hairstyles such as braids, locks, and twists), color, religion, religious creed (including religious dress and grooming practices), national origin, ancestry, citizenship, physical or mental disability, medical condition (including cancer and genetic characteristics), genetic information, marital status, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), gender (including gender identity and gender expression), age (40 years and over), sexual orientation, veteran and/or military status, protected medical leaves (requesting or approved for leave under the Family and Medical Leave Act or the California Family Rights Act), reproductive health decision making, domestic violence victim status, political affiliation, or any other status protected by federal, state, or local laws.

We will consider qualified applicants who have criminal histories in a manner consistent with the law.

We collect personal information from you in connection with your application for employment with Partner Engineering and Science, Inc. For details on what personal information we collect and the purposes for which we collect it, please visit:

Equal Opportunity Employer
This employer is required to notify all applicants of their rights pursuant to federal employment laws.For further information, please review the Know Your Rights notice from the Department of Labor.