Senior Red Team Specialist – IT/OT Cybersecurity

Expleo Group

Senior Red Team Specialist focusing on IT/OT Cybersecurity at Expleo. Engaging in red teaming, vulnerability assessments, and improving security strategies within enterprise environments.

Posted 6/16/2026full-timeBucharest • 🇷🇴 RomaniaSeniorWebsite

Tech Stack

Tools & technologies

AWSAzureCloudDNSLinuxPythonTCP/IP

About the role

Key responsibilities & impact

Plan and execute red team engagements against enterprise IT and industrial OT environments
Simulate real-world attack scenarios including: Initial access, lateral movement, privilege escalation, Persistence, data exfiltration, and command-and-control
Conduct adversary emulation based on known threat actors (e.g., MITRE ATT&CK framework)
Test security controls across IT infrastructure (Active Directory, cloud, endpoints, networks) and OT/ICS systems (SCADA, PLCs, industrial networks)
Identify vulnerabilities in systems, applications, and network architectures
Develop and deploy custom tools, scripts, and payloads for offensive operations
Collaborate with Blue Team / SOC for purple team exercises
Produce clear, actionable reports with: Attack paths, Risk assessments, Remediation recommendations
Contribute to continuous improvement of detection capabilities and security strategies
Stay current on emerging threats, vulnerabilities, and attack techniques (especially IT/OT convergence risks)

Requirements

What you’ll need

Strong experience in Red Teaming / Offensive Security / Penetration Testing
Solid understanding of enterprise IT environments, including: Active Directory attacks, Windows/Linux systems, Networking (TCP/IP, DNS, VPNs), Cloud platforms (Azure/AWS preferred)
Experience or strong knowledge of OT/ICS security, including: SCADA systems, Industrial protocols (Modbus, OPC, DNP3, etc.), Segmentation and Purdue model
Familiarity with frameworks: MITRE ATT&CK (Enterprise & ICS), Cyber Kill Chain
Hands-on experience with tools such as: Cobalt Strike, Metasploit, Burp Suite, BloodHound, Mimikatz, Nmap, Red team automation frameworks
Scripting/programming skills (Python, PowerShell, Bash, or similar)
Strong analytical and problem-solving skill

Benefits

Comp & perks

Holiday Voucher
Private medical insurance
Performance bonus
Easter and Christmas bonus
Employee referral bonus
Bookster subscription
Work from home options depending on project

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Red TeamingOffensive SecurityPenetration TestingActive Directory attacksWindows systemsLinux systemsNetworkingCloud platformsOT/ICS securityScripting

Soft Skills

analytical skillsproblem-solving skills