IT Systems Administrator

Posted Yesterday
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Torrance, CA, USA
In-Office
99K-129K Annually
Senior level
Defense
The Role
Administer and secure hybrid on-premises and Azure Government/Microsoft 365 GCC High environments. Manage Windows servers, identity, endpoints, storage, backups, applications, and infrastructure performance while providing Tier II/III support. Monitor and respond to security alerts, implement hardening and DISA STIG baselines, maintain CMMC evidence and compliance documentation, support incident response, and collaborate on systems planning, migrations, and lifecycle upgrades. Provide mentoring, documentation, automation, and planned or emergency support.
Summary Generated by Built In
Intellisense Systems, Inc. is a privately held, Southern California-based technology innovator with a proven track record of developing and deploying innovative products that successfully operate in the most extreme environments. We solve tough, mission-critical challenges for our customers in the aerospace, defense, and commercial markets, delivering the full data continuum from sensing and embedded processing to video integration, displays, and data/video recording and storage for airborne and ground vehicle platforms. Our portfolio also includes environmental and maritime sensing and smart power management systems, engineered to the highest levels of safety certification and built with embedded cybersecurity and advanced encryption capabilities.
We are seeking a self-motivated, experienced IT Systems Engineer to support and secure our hybrid Microsoft environment, including Azure Government and Microsoft 365 GCC High. This person will split their time between infrastructure and cybersecurity work and Tier II/III support and will be flexible enough to shift focus as business needs change. 
Location: Torrance, CA (Onsite)
Responsibilities:
Infrastructure and Cybersecurity Responsibilities (70-80%) 
  • Monitor, administer, maintain, and troubleshoot on-prem environment, including Active Directory, GPOs, File and Print services (PaperCut), Active Directory Certificate Services (AD CS), NPS/RADIUS, Windows Server 2016–2025, Hyper-V cluster, and Veeam backups
  • Monitor, administer, maintain, and troubleshoot cloud environment, including Azure Government IaaS, Entra ID, SharePoint, and other Microsoft 365 GCC High applications 
  • Administer and optimize workloads hosted in Azure Government, including Azure Virtual Desktop, virtual networking, and site-to-site VPN connectivity
  • Assist efforts to migrate local file storage to SharePoint  
  • Responsible for local and cloud Server and Application performance 
  • Manage endpoints through Intune, including Settings Catalog configuration, compliance policies, and remediation scripts for hybrid-joined devices
  • Use NinjaOne RMM for patch management, scripting, and remote support
  • Administer endpoint security, including CrowdStrike Falcon EDR and BitLocker encryption
  • Support engineering and lab applications, including MATLAB, Zemax OpticStudio, OceanView, SolidWorks, and IBM DOORS, along with their license servers
  • Analyze, diagnose, isolate, and identify system problems. Create short-term solutions to alleviate problem symptoms. Identify root causes and create and/or execute long term remediation plans
  • Conduct implementations that include configuring, installing, and updating servers and applications based on standards 
  • Participate in systems planning and help develop Systems roadmap 
  • Contribute to systems maintenance efforts and perform system hardening 
  • Plan and perform Windows Server lifecycle work, including in-place upgrades and post-upgrade validation
  • Responsible for monitoring and maintaining NetApp storage, Dell servers (including iDRAC out-of-band management), UPS/power systems, and other appliances at the data center
  • Work closely with MSSP to continually monitor and analyze system activity to identify malicious activity
  • Triage and respond to security alerts from CrowdStrike Falcon, the MSSP, and Microsoft 365/Entra ID. Take containment actions such as isolating hosts, disabling accounts, and revoking sessions, following the incident response plan
  • Document and escalate incidents (including event’s history, status, and potential impact for further action) that may cause ongoing and immediate environmental impact
  • Implement and maintain DISA STIG baselines and validate them with SCAP scans. Maintain the System Security Plan (SSP) and Plan of Action and Milestones (POA&M) for vulnerabilities identified during risk assessments, audits, and inspections 
  • Collect and maintain evidence for CMMC Level 2 assessments, including in Vanta
  • Document security implementations and support ongoing compliance with IT security policies and configuration guidelines
 
Helpdesk Support Tier II & III (20-30%) 
  • Serve as Tier II/III support for helpdesk tickets, stepping into Tier I when needed.
  • Work closely with Tier I to resolve issues and train in new technologies
  • Follow and maintain technical documentation, procedures, and policies, and suggest improvements.
  • Mentor junior members of the team 
  • Perform other tasks as assigned by management 

Requirements:
  • 5+ years of progressive experience administering enterprise Windows Server and Microsoft Azure environments
  • Skilled in Active Directory, GPO, Windows Servers, PowerShell Scripting, DNS, and Veeam 
  • Experience with Entra ID, Conditional Access, Intune, SharePoint, Exchange Online, Microsoft 365, general storage, Veeam and Server technologies  
  • Microsoft certifications such as AZ-104, AZ-500, SC-300, or MD-102, or CompTIA Security+, a plus 
  • Cybersecurity such as SIEM, Intune, Entra Conditional Access, and MFA experience a plus 
  • Experience with Linux (Ubuntu), an ITSM ticketing platform, and documenting procedures in a shared knowledge base such as Notion a plus
  • Experience administering and governing enterprise AI tools a plus
  • Team player, proactive, reliable, and self-motivated individual who is always striving to optimize and automate 
  • Available for planned support and/or emergencies 24x7 
  • Working knowledge of NIST SP 800-171, CMMC Level 2, and CUI handling requirements under DFARS 252.204-7012 (NIST SP 800-53 familiarity a plus) 
  • Experience with Azure Government or Microsoft GCC High environments preferred
  • This position requires U.S. citizenship and the ability to obtain and maintain a U.S. Government security clearance

Compensation: $99,000 - $129,000 (Base salary for this position will vary based on your skills, qualifications, and experience)
REQ. #26053
 

Skills Required

  • 5+ years of progressive experience administering enterprise Windows Server and Microsoft Azure environments
  • Experience with Active Directory, Group Policy, Windows Server, PowerShell scripting, DNS, and Veeam
  • Experience with Entra ID, Conditional Access, Intune, SharePoint, Exchange Online, Microsoft 365, storage, Veeam, and server technologies
  • Availability for planned support and emergencies 24x7
  • Working knowledge of NIST SP 800-171, CMMC Level 2, and CUI handling requirements under DFARS 252.204-7012
  • U.S. citizenship
  • Ability to obtain and maintain a U.S. Government security clearance
  • Microsoft certifications such as AZ-104, AZ-500, SC-300, or MD-102, or CompTIA Security+
  • Experience with SIEM, Intune, Entra Conditional Access, and MFA
  • Experience with Linux Ubuntu
  • Experience with an ITSM ticketing platform
  • Experience documenting procedures in a shared knowledge base such as Notion
  • Experience administering and governing enterprise AI tools
  • Familiarity with NIST SP 800-53
  • Experience with Azure Government or Microsoft GCC High environments
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The Company
HQ: Torrance, CA
125 Employees
Year Founded: 2018

What We Do

Intellisense Systems, Inc. is a leading provider of advanced sensing and display solutions supporting a data continuum from acquisition to visualization. We enhance our hardware with software that adds intelligence to our systems and can turn raw data into useful information for improved decision making and process automation. Intellisense Systems offers both off-the-shelf products and custom development services. These services include research and development, requirements analysis, design, systems integration, prototyping, production, testing, field support, and training. Headquartered in the South Bay area of Los Angeles, we occupy over 100,000 square feet across two facilities. Our manufacturing capabilities include electronics fabrication, unit qualification testing, systems integration, and volume production with full quality assurance. Intellisense Systems is qualified across engineering, accounting, and manufacturing to serve both government and commercial customers.

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