Security Engineer

Closer Consulting; Lisboa; Remote; EUR 49,000 - 67,000; Full time

Job summary

Closer Consulting is seeking a Security Engineer to join the team in Lisbon, Portugal. The role targets 1–3 years in Systems Administration, with hands-on Windows Server and Linux experience and solid networking knowledge in enterprise settings.

Applicants should bring basic cybersecurity understanding, strong problem-solving skills, and English at B2 level or higher. The position supports remote work with a home office kit and a clear career plan with training opportunities.

Qualifications

• 1–3 years of experience in Systems Administration, Infrastructure Support, or a similar technical role.
• Hands-on experience with Windows Server administration and troubleshooting.
• Practical knowledge of Linux, including command-line usage and system diagnostics.
• Solid understanding of networking fundamentals (TCP/IP, DNS, DHCP, routing, and network connectivity).
• Basic knowledge of cybersecurity, including patch management, system hardening, and vulnerability management.
• Strong analytical and troubleshooting skills with a structured approach to problem-solving.
• English proficiency at B2 level or higher.

Skills

Windows Server

Linux

Networking fundamentals

Cybersecurity basics

Analytical skills

English proficiency (B2)

Tools

PowerShell

Bash

Python

Job description

Mutual Respect, Empathy, Innovation and Professional Pride. Do you see yourself within these values?

Founded in 2006 under the mission "To Challenge Complexity", Closer Consulting is a Data Science company specialized in Business Intelligence, Advanced Analytics and Artificial Intelligence.

Developing projects in the most diverse industries – Banking, Telecommunications, Healthcare, Retail, Energy, Insurance, Aviation, among others –, we have created an environment where the brightest enquiring minds feel at home, providing our people the means, opportunities and support they need to thrive and innovate.

We are now looking for a Security Engineer willing to accept new challenges in our Closer team.

Are you the one?

• 1–3 years of experience in Systems Administration, Infrastructure Support, or a similar technical role.
• Hands-on experience with Windows Server administration and troubleshooting.
• Practical knowledge of Linux, including command-line usage and system diagnostics.
• Solid understanding of networking fundamentals (TCP/IP, DNS, DHCP, routing, and network connectivity).
• Basic knowledge of cybersecurity, including patch management, system hardening, and vulnerability management.
• Strong analytical and troubleshooting skills with a structured approach to problem-solving.
• English proficiency at B2 level or higher.

Nice to Have

• Scripting and automation skills using PowerShell, Bash, and/or Python.
• Experience with monitoring, logging, and event analysis tools.
• Knowledge of Incident, Problem, and Change Management processes.
• Experience working in enterprise environments with critical infrastructure or high security requirements.

We believe we are the ones too, by:

• Providing a multidisciplinary Team.
• Giving a home office kit with everything you need to perform remotely.
• Ensuring a career plan alongside professional growth.
• Providing you with a custom training plan.

Oh… and by the way, we also have:

• Several challenging complex projects.
• Stimulating teams and leaders.
• World-class Clients and Partners.

Closer is a company that values diversity and inclusion. We are committed to fostering an environment where everyone is treated with dignity and respect, regardless of race, gender, beliefs, sexual orientation, physical or mental disability, or other personal characteristics. At Closer, we embrace the unique perspectives and experiences that everyone brings, and we believe that it is a fundamental driver for the success we've achieved.