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Temporary Weekend System Administrator Jobs in California

Vast

Senior IT System Administrator

Long Beach, CA

$90K - $122K/yr

Vast is looking for a Senior IT System Administrator , reporting to the System Administrator ... Willingness to work evenings and/or weekends to support critical mission milestones * Ability to ...

Freeform

IT System Administrator

Los Angeles, CA

IT SYSTEM ADMINISTRATOR Freeform builds AI-native manufacturing systems that unify software ... Willingness to work occasional weekends to support maintenance windows and critical operations  ...

Freeform

IT System Administrator

Los Angeles, CA · On-site

IT SYSTEM ADMINISTRATOR Freeform builds AI-native manufacturing systems that unify software ... Willingness to work occasional weekends to support maintenance windows and critical operations ...

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Infographic showing various Temporary Weekend System Administrator job openings in California as of July 2026, with employment types broken down into 1% As Needed, 82% Full Time, 13% Part Time, 1% Temporary, and 3% Contract. Highlights an 93% Physical, 3% Hybrid, and 4% Remote job distribution.

Core Infrastructure System Administrator (System Administrator 3)- Fremont, CA

M.C. Dean, Inc

Fremont, CA • On-site

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 16 days ago

M.C. Dean rating

7.5

Company rating: 7.5 out of 10

Based on 44 frontline employees who took The Breakroom Quiz

284th of 438 rated engineering

Job description

Overview
About M.C. Dean
M.C. Dean is Building Intelligence®. We design, build, operate, and maintain cyber-physical solutions for the nation's most mission-critical facilities, secure environments, complex infrastructure, and global enterprises. With over 9,000 employees, our capabilities span electrical, electronic security, telecommunications, life safety, automation and controls, audiovisual, and IT systems. Headquarters in Tysons, Virginia, M.C. Dean delivers resilient, secure, and innovative power and technology solutions through engineering expertise and smart systems integration.
Why Join Us?
Our people are passionate about engineering innovation that improves lives and drives impactful change. Guided by our core values-agility, expertise, and trust-we foster a collaborative and forward-thinking work environment. At M.C. Dean, we are committed to building the next generation of technical leaders in electrical, engineering, and cybersecurity industries.
We are seeking a Core Infrastructure System Administrator (System Administrator 3) to join our Security and Electronic Systems (SES) business Unit. As part of (SES) Strategic Business Unit you will be part of a team that designs, engineers, integrates, operates and maintains electronic security services inclusive of intrusion detection, access control, biometric authentication, video surveillance, audio visual, it systems, perimeter defense and command and control systems for federal, local and commercial customers across high-growth markets.
Responsibilities
Core Infrastructure System Administrator (Sys Admin 3) is a key member of the global technology team responsible for building and maintaining enterprise technology application systems
Essential Responsibilities and Activities Include but are Not Limited to:
  • Maintaining production systems, software, hardware, and end devices.
  • Installation, configuration, maintenance, and support of physical and cloud-based Windows and Linux servers.
  • Ensuring the security, integrity, and availability of systems.
  • Monitoring operational systems for errors and alerts.
  • Troubleshooting, adding, configuring, and removing various technologies related to access control, intrusion detection, emergency, video, and other security systems.
  • Document daily functions and troubleshooting process to create and revise playbooks.

Work Schedule:
  • This may require extended hours or weekend support.
  • On-site requirements are subject to change and could increase at any time.

Qualifications
Education:
  • Bachelor's Degree and 5+ Years of progressive experience or
  • Associates Degree and 8+ Years of progressive experience or
  • HS Diploma or Equivalent and 10+ Years of progressive experience

Requirements:
  • Requires system administrator experience in performing triage on system problems, resolving the system problems, analyzing system data to prevent problems, implementing new workstations, and system extensions.
  • Requires 2 + years of experience programming/administrating Physical Access Control Systems.
  • Demonstrated previous experience effectively managing small teams.
  • Demonstrated understanding of Windows patching and vulnerability remediation.
  • Demonstrated advanced knowledge of Windows active directory hierarchy and implementation.
  • Basic knowledge of large-scale networking, VLANS and routing.
  • Requires reliable attendance at customer site during work hours required by customer.
  • Requires the ability to work flexible shifts that include nights, weekends and holidays as needed.
  • Requires minimum of Security + Certification, CASP, or CISSP certification.
  • Demonstrated background working with multidisciplinary teams.
  • Demonstrated time management and organization skills to meet deadlines and quality objectives.
  • Proficient in MS Excel, Word, Visio, and PowerPoint.

Travel:
  • Up to 25% annual

What we offer:
  • A collaborative team inspired by the way engineering and innovation enhance customer outcomes, improve lives, and change the world for the better. We are driven by our core values of agility, expertise, and trust.
  • An opportunity to lead and build a business with the support of an industry-leading firm that has been in business for 75 years.
  • Investment in your skills and expertise through a combination of professional and technical training programs, including leadership training and tuition reimbursement.
  • Open and transparent communication with senior leadership as well as local office management.

We offer an excellent benefits package including:
  • A competitive salary
  • Medical, dental, vision, life, and disability insurance
  • Paid time off
  • Tuition reimbursement
  • 401k Retirement Plan
  • Military Reserve pay offset
  • Paid maternity leave

Abilities
  • Exposure to computer screens for an extended period of time.
  • Sitting for extended periods of time.
  • Reach by extending hands or arms in any direction.
  • Have finger dexterity in order to manipulate objects with fingers rather than whole hands or arms, for example, using a keyboard.
  • Listen to and understand information and ideas presented through spoken words and sentences.
  • Communicate information and ideas in speaking so others will understand.
  • Read and understand information and ideas presented in writing.
  • Apply general rules to specific problems to produce answers that make sense.
  • Identify and understand the speech of another person.

Pay Range
USD $114,640.00 - USD $157,630.00 /Yr.

What M.C. Dean employees say

Pay

Benefits

Hours and flexibility

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About M.C. Dean

Sourced by ZipRecruiter

M.C. Dean is Building Intelligence®. We design, build, operate, and maintain cyber-physical solutions for the nation's most recognizable mission-critical facilities, secure environments, complex infrastructure, and global enterprises. The company's capabilities include electrical, electronic security, telecommunications, life-safety, instrumentation and control, and command and control systems. M.C. Dean is headquartered in Tysons, Virginia, and employs more than 5,100 professionals who engineer and deploy automated, secure, and resilient power and technology systems; and deliver the management platforms essential for long-term system sustainability.

Industry

Engineering professional services

Company size

10,000+ Employees

Headquarters location

Tysons, VA, US

Year founded

1949

Social media

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