System Administrator 1

M.C. Dean, Inc.; Greater London; Hybrid; GBP 38,000 - 60,000; Full time

Benefits offered by this job

Tuition reimbursement

Leadership training

Transparent leadership communication

Job summary

System Administrator 1 at M.C. Dean, Inc. in the United Kingdom seeks a hands-on IT professional to monitor and support electronic security and IT systems.

You will perform triage, patching, and problem analysis while maintaining Windows environments and security updates, ensuring continuous operations for federal, local, and commercial customers. You will work with intrusion detection, CCTV, PSIM, and other security technologies, providing user support, documenting steps, and contributing to

Qualifications

• BS degree or equivalent and relevant IT experience.
• HS Diploma with 6+ years progressive IT experience acceptable.
• Experience triaging system problems and proactive remediation.

Responsibilities

• Monitor and maintain physical access control, CCTV, and PSIM systems.
• Provide Tier-1 helpdesk support and initial triage of IT issues.
• Document troubleshooting steps in ticketing system and escalate as needed.
• Monitor enterprise system status and notify senior admins of outages.
• Support configuration and management of Windows OS and security updates.
• Assist in backups, logs review, and IA/STIG compliance tasks.
• Contribute to SOPs and technical documentation.

Skills

Windows patching

Vulnerability remediation

Networking basics (VLANS & routing)

End-user support

Windows OS administration

Documentation & SOPs

Effective communication

Education

BS degree or higher

HS Diploma or Equivalent with 6+ years experience

Tools

Ticketing system

MS Excel

MS Word

Visio

PowerPoint

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.

System Administrator 1

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.

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.

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.