Senior Systems Administrator

Job Type


Full-time

Description

We are seeking an accomplished Senior Systems Administrator to serve as a senior technical resource within our IT organization. This role owns the design, administration, and continuous improvement of our enterprise IT infrastructure including on-premises systems, cloud environments, identity platforms, cybersecurity operations, and core network services. The ideal candidate brings deep technical breadth, a strong security mindset, leadership through influence, and the maturity to operate independently on complex, high-impact initiatives while mentoring the broader IT team.

Infrastructure Leadership:

• Serve as the senior technical authority for all enterprise infrastructure including Windows Server, Linux, virtualization, storage, and backup systems

• Design, implement, and maintain scalable, highly available infrastructure architecture across on-premises and cloud environments

• Lead infrastructure projects from architecture through deployment: hardware refreshes, data center operations, cloud migrations, and platform upgrades

• Establish and enforce infrastructure standards, naming conventions, and configuration baselines across all managed systems

• Own capacity planning, lifecycle management, and technology roadmap input for infrastructure platforms

Cloud & Identity:

• Serve as the senior administrator for Microsoft Azure/Entra ID including hybrid identity, SSO, MFA, Conditional Access, and Privileged Identity Management (PIM)

• Manage and optimize the Microsoft 365 tenant at an advanced administrative level: Exchange Online, SharePoint, Teams, Intune, and Microsoft Defender

• Lead cloud strategy execution including IaaS/PaaS adoption, cloud cost governance, and architecture decision-making

• Design and maintain network security architecture: firewall rules, VLANs, SD-WAN, VPN, and Zero Trust network access principles

Security & Compliance:

• Work with IT leadership on enterprise cybersecurity operations programs including EDR, SIEM, vulnerability management, and incident response

• Lead patch management strategy and execution across all endpoints, servers, and network devices

• Work with IT leadership conducting regular security assessments and drive remediation of identified vulnerabilities

• Develop and maintain security policies and procedures aligned with NIST CSF or equivalent frameworks

• Support internal audits, external assessments, and regulatory inquiries from an IT infrastructure perspective

Team Leadership & Mentorship:

• Provide technical mentorship and day-to-day guidance to the IT Support Specialist team

• Conduct architecture reviews for infrastructure changes proposed by junior staff

• Develop and maintain comprehensive technical documentation including architecture diagrams, runbooks, SOPs, and change logs

• Lead root cause analysis (RCA) for major incidents and drive post-incident reviews and remediation

• Serve as the primary IT operational decision-maker in the IT Director's absence

Automation & Continuous Improvement:

• Develop and maintain PowerShell and scripting solutions to automate repetitive administrative tasks, reporting, and compliance checks

• Identify and drive opportunities to improve IT operational efficiency and strengthen security posture

• Evaluate and recommend emerging technologies to IT leadership with well-reasoned business cases

• Manage strategic vendor relationships for infrastructure, cloud, and security services

Requirements

Required Qualifications:

• 6+ years of progressive IT infrastructure and systems administration experience with demonstrated senior-level ownership

• Expert-level proficiency in Windows Server (2016/2019/2022): Active Directory, Group Policy, DNS, DHCP, DFS, and certificate services

• Advanced Microsoft Azure administration: Entra ID, Intune, Defender, or equivalent cloud security platform

• Deep expertise in VMware vSphere (vCenter, ESXi, vSAN) or Microsoft Hyper-V at scale

• Strong networking skills: routing, switching, VLANs, BGP/OSPF fundamentals, firewall policy management, VPN, and SD-WAN

• Proven PowerShell scripting and automation capabilities

• Demonstrated experience leading infrastructure projects and mentoring junior IT staff

• Strong written communication skills and ability to produce clear technical documentation

Preferred Qualifications:

• Microsoft Certified: Azure Administrator Associate (AZ-104) or Azure Solutions Architect Expert (AZ-305)

• VMware Certified Professional (VCP-DCV) or equivalent

• CompTIA Security+ or equivalent security certification

• Microsoft Certified: Identity and Access Administrator (SC-300) or Security Operations Analyst (SC-200)

• Experience with SIEM platforms such as Microsoft Sentinel or Splunk

• Familiarity with Zero Trust architecture principles and implementation

• Experience with infrastructure-as-code tools such as Terraform, Bicep, or Ansible

• ITIL v4 Foundation or Managing Professional certification

The compensation package for this role includes a base salary, commission, and equity. MaxCyte also offers a comprehensive benefits package including health, dental, vision, life, and disability insurance and generous time off.


MaxCyte is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, sex, sexual orientation, gender identity, religion, national origin, disability, veteran status, age, marital status, pregnancy, genetic information, or other legally protected status.