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

M.C. Dean; Fremont (CA); On-site; USD 114,640 - 171,960; Full time

Benefits offered by this job

Paid time off

Tuition reimbursement

401(k) Retirement Plan

Medical, dental, and vision insurance

Paid maternity leave

Job summary

A leading technology firm in Fremont, CA is looking for a Core Infrastructure System Administrator to join their global technology team. The role involves maintaining enterprise technology application systems and ensuring security and availability. Ideal candidates should have a degree, relevant certifications, and system admin experience. Competitive salary range of $114,640 - $171,960 annually along with excellent benefits including 401(k), paid time off, and tuition reimbursement.

Qualifications

• 5+ years of progressive experience in system administration.
• Experience with team management and multi-disciplinary teams.
• Minimum of Security + Certification or equivalent.

Responsibilities

• Maintain production systems and ensure system security.
• Install and configure Windows and Linux servers.
• Document functions and troubleshooting processes.

Skills

System administration

Programming Physical Access Control Systems

Team management

Windows patching

Time management

Proficient in MS Office Suite

Education

Bachelor's Degree

Associates Degree

HS Diploma or Equivalent

Tools

Windows

MS Excel

MS Word

MS Visio

MS PowerPoint

Job description

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

paid time off, tuition reimbursement, 401(k), retirement plan

United States, California, Fremont

Mar 18, 2026

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 7,000 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.

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

Key Requirements:

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, CONUS and OCONUS locations.

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 $171,960.00 /Yr.