Technology Department - Infrastructure, Cloud & Security Engineer

CACI Limited; Greater London; On-site; GBP 28,000 - 36,000; Full time

Job summary

CACI Limited in London is seeking a Junior Infrastructure, Cloud & Security Engineer to join the Infrastructure, Cloud & Security team within the Technology function. You will gain hands-on experience across cloud, network and security, working with AWS, Linux, networking and security technologies.

This role offers a path to grow your IT career by supporting and securing enterprise infrastructure, contributing to projects, and developing practical skills through mentoring and collaboration with

Qualifications

• Understanding of TCP/IP networking fundamentals.
• Knowledge of routing, switching, VLANs, DNS and DHCP.
• Basic understanding of firewalls, VPNs and network security principles.
• Familiarity with Linux operating systems.
• Understanding of Windows Server and Active Directory fundamentals.
• Awareness of AWS and cloud computing concepts.
• Understanding of common cybersecurity threats and security best practices.
• Strong troubleshooting and analytical skills.
• Excellent communication and teamwork skills.
• A proactive attitude and enthusiasm for learning.

Responsibilities

• Assist with administration and monitoring of AWS cloud environments.
• Support network infrastructure across Cisco Meraki platforms.
• Help manage firewalls, VPNs and network security controls.
• Support Linux server administration, patching and monitoring.
• Assist with incident investigation and infrastructure troubleshooting.
• Contribute to vulnerability management and security improvement initiatives.
• Support ISO27001 compliance activities and security best practices.
• Produce technical documentation and operational procedures.
• Contribute to infrastructure upgrades and technology projects.

Skills

TCP/IP

Routing & Switching

Firewalls & VPNs

Linux OS

Windows Server

AWS Cloud

Cybersecurity basics

Troubleshooting

Communication

Teamwork

Learning attitude

Tools

Cisco Meraki

Job description

Technology Department - Infrastructure, Cloud & Security Engineer

London W14 8TS, UK

Job Description

Posted Wednesday 12 August 2026 at 00:00

About the Role

We're looking for a Junior Infrastructure, Cloud & Security Engineer to join our Infrastructure, Cloud & Security team within CACI's central Technology function.

This is an excellent opportunity for someone early in their IT career who is passionate about cloud technologies, networking and cybersecurity. You'll work alongside experienced engineers, supporting and securing enterprise infrastructure across cloud, network and on-premises environments while developing your skills in AWS, Linux, networking and security technologies.

What You'll Be Doing

You'll support the delivery, maintenance and security of CACI's infrastructure services, including:

• Assisting with the administration and monitoring of AWS cloud environments
• Supporting network infrastructure across Cisco and Meraki platforms
• Helping manage firewalls, VPNs and network security controls
• Supporting Linux server administration, patching and monitoring
• Assisting with incident investigation and infrastructure troubleshooting
• Contributing to vulnerability management and security improvement initiatives
• Supporting ISO27001 compliance activities and security best practices
• Producing technical documentation and operational procedures
• Contributing to infrastructure upgrades and technology projects

What We're Looking For

• Understanding of TCP/IP networking fundamentals
• Knowledge of routing, switching, VLANs, DNS and DHCP
• Basic understanding of firewalls, VPNs and network security principles
• Familiarity with Linux operating systems
• Understanding of Windows Server and Active Directory fundamentals
• Awareness of AWS and cloud computing concepts
• Understanding of common cybersecurity threats and security best practices
• Strong troubleshooting and analytical skills
• Excellent communication and teamwork skills
• A proactive attitude and enthusiasm for learning

Experience

We welcome experience gained through employment, apprenticeships, education, home labs or personal projects in areas such as:

• Networking
• Cloud technologies
• Infrastructure support
• Cybersecurity

Experience or exposure to any of the following would be advantageous:

• Check Point firewalls
• AWS or Azure cloud services
• VPN technologies
• Web Application Firewalls (WAF)
• Scripting and automation (Bash, Python or PowerShell)
• Monitoring and security tools
• Infrastructure-as-Code concepts

We're interested in candidates working towards or holding certifications such as:

• CompTIA Network+
• CompTIA Security+
• AWS Solutions Architect Associate

Why Join Us?

At CACI, you'll have the opportunity to learn from experienced specialists, work with modern cloud and security technologies, and develop your career within a collaborative and innovative technology team.

CACI is proud to be an equal opportunities employer. Embracing the diversity of our people, we are on a journey to build a truly inclusive work environment where no one is treated less favourably due to ethnic origin, age, sex, gender identity, veteran status, religion or belief, sexual orientation, marital status, and disability or health condition, actively working to prevent discrimination.

As a Disability Confident employer, we will;

• Provide reasonable adjustments in the recruitment process where requested (contact a member of the recruitment team on 020 7602 6000 to discuss individual requirements further).
• Offer people with health conditions and disabilities, meeting the minimum criteria for a role, an interview.
• Our people are unique and we encourage, and support them, to be confident in contributing to our inclusion journey.