M.C. Dean, Inc

Oct 29, 2026

System Administrator 1

United Kingdom

London, England, United Kingdom

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 System Administrator 1 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

What you’ll do: In this role you will be working as part of a team to monitor, maintain, and test Physical Access Control, CCTV, PSIM and other electronic security systems and support implementation, troubleshooting and maintenance of Information Technology (IT) systems in support of the endpoint devices. The position provides Tier 1 helpdesk support.

Main responsibilities include but are not limited to:

Provide assistance to end users in accessing and using IT systems.

Answer Help desk phone calls; triage initial phone calls providing support and determine when escalation is required.

Utilize technology-based problem tracking system (i.e., ticketing system) to document helpdesk phone calls; document troubleshooting steps prior to completing ticket and or escalating to next level of support.

Monitor Enterprise system status for problems such as network outages and or degraded services; provide initial troubleshoot notify proper Sr. Level administrators when required.

Support daily operations to include monitoring and reviewing system logs.

Support configuration and management of Windows operating systems and install/load operating system software.

Support desktop hardware and operating system set-up, imaging software loading, and antivirus updates.

Support execution of IAVA updates and patching to ensure compliance with Information Assurance (IA) standards.

Support application of Security Technical Implementation Guides (STIGs) to Windows based operating systems (servers and workstations).

Support installation, configuration, and maintenance of 3rd party applications.

Performs root cause analysis on significant issues at appropriate level of support.

Support preventive maintenance actions including system back-ups, error log reviews, database size analysis, and integrity checks.

Stay current with technological developments and make recommendations for ways to take advantage of new and emerging technology.

Contribute to technical documentation such as standard operating procedures (SOP) and as builds for both technical and non-technical audiences.

Perform all duties under direct supervision.

Qualifications

Education/Experience

BS degree and 0+ Years of progressive experience or

HS Diploma or Equivalent and 6+ Years of progressive experience

Requires some system administrator experience in performing triage on system problems, resolving system problems, analyzing system data to prevent problems, implementing new workstations, and system extensions.

Demonstrated understanding of Windows patching and vulnerability remediation.

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, holidays and on-call as needed.

Requires minimum of IAT Level II certification (e.g., Security+).

Demonstrated background working with multidisciplinary teams.

Demonstrated time management and organization skills to meet deadlines and quality objectives.

Able to use MS Excel, Word, Visio, and PowerPoint.

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.

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.

Languages

System Administrator 1

Overview

About M.C. Dean

Why Join Us?

Responsibilities

Qualifications

Education/Experience

Abilities

What we offer

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