L2/L3 Senior Administrator

Job ID: 113653
Location: Jersey City, New Jersey  [On-Site]
Category: Infrastructure
Employment Type: Contract
Date Added: 09/23/2026
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Role Summary
This position involves providing advanced technical support and administration for Windows 11 endpoint devices within a highly secure, 24×7 production environment. The senior administrator will oversee the full device lifecycle, ensuring platform stability, security compliance, and operational efficiency. The role requires a highly skilled professional capable of troubleshooting complex issues and working effectively within a critical enterprise setting.

Responsibilities

  • Administer Windows 11 endpoint devices throughout the entire device lifecycle, including enrollment, configuration, patching, and application deployment
  • Manage compliance policies and profiles using Omnissa Workspace ONE UEM (formerly AirWatch)
  • Troubleshoot complex OS, VPN, certificate, and policy-related issues to maintain endpoint stability
  • Support enterprise laptop fleet performance and security within a production environment
  • Participate in a 24×7 on-call support rotation to ensure continuous platform availability
  • Coordinate patch and application deployment cycles with minimal user disruption
  • Document platform standards, configurations, and operational procedures for ongoing reference
  • Collaborate with security, endpoint, and infrastructure teams to resolve platform issues and enhance security posture
  • Ensure adherence to security policies, operational protocols, and best practices in a regulated environment
  • Monitor and optimize the health and performance of Windows 11 endpoints in a fast-paced enterprise setting

Qualifications

  • 5+ years of experience supporting Windows endpoint environments in enterprise settings
  • Hands-on experience with Omnissa Workspace ONE UEM managing Windows 10/11 devices
  • Comprehensive knowledge of the full device lifecycle: enrollment, configuration, patching, application deployment, and compliance
  • Strong troubleshooting abilities related to OS, VPN, certificates, and policy issues
  • Working knowledge of Windows 11 endpoint administration and security considerations
  • Ability to operate within a 24×7 on-call rotation supporting critical production systems
  • Demonstrated security awareness and operational discipline in large-scale, regulated environments
  • Experience working in fast-paced, high-volume enterprise settings
  • Excellent collaboration and communication skills to coordinate with cross-functional teams

Publishing Pay Range: $70.13 – $78.46 hourly

This position is based in office and requires employee to work on-site.

About GDH:
At GDH, we believe in the power of people and the importance of caring. Our culture statement, “We care about people,” isn’t just a tagline – it’s the core of everything we do. GDH is a premier staffing and talent solutions company dedicated to helping businesses find the best talent and assisting job seekers in finding their dream jobs.

Who We Are:
GDH, founded in 2001, has grown into a leader in providing staffing solutions across various industries. We specialize in IT across several sectors, connecting top talent with leading enterprises. As a Best of Staffing firm recognized for excellence in client, employee, talent, and women’s services, we pride ourselves on our commitment to quality and service.

GDH Benefits

GDH offers a range of employee benefits that are designed to promote well-being and help maintain a healthy work-life balance. These comprehensive benefits cover various aspects of an employee’s life and aim to enhance their overall experience with the company. Our health benefits include three medical insurance options with access to KISx Card, Zero Card, and HealthJoy concierge services. Other plan offerings include dental, vision, life, disability, supplemental insurance, and pet insurance plans. Enjoy additional perks like holiday pay, 401(k) plan, direct deposit, an employee referral program, work-life balance benefits, a Wellbeats membership, a discounted gym membership program, and more!  For more detailed information on benefits, please go to GDH’s website under the tab for candidates.

GDH provides equal employment opportunities (EEO) to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, gender, sex (including pregnancy), sexual orientation, gender identity, national origin, age, disability, genetic information, marital status, ancestry, protected veteran status, military or uniformed service member status, or any other status or characteristic protected by applicable federal, state, and local laws. Applicants with disabilities who require an accommodation or assistance in applying and/or for interviewing, please contact our HR Department.

Please visit our notice of collection for California applicants.

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