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Engineer - VAPT (IT/OT, ICS & IIoT)

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Posted:6 days ago| Platform: Linkedin logo

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Remote

Job Type

Full Time

Job Description

Description

As an IT/OT Vulnerability Assessment and Penetration Testing (VAPT) Engineer, you will be engaged in identifying and mitigating security vulnerabilities across IT systems, Industrial Control Systems (ICS), and Industrial Internet of Things (IIoT) environments. Your work will involve rigorous security assessments of critical infrastructure, SCADA systems, PLCs, field devices, gateways, and cloud-connected IIoT platforms. You will simulate advanced adversary tactics to expose vulnerabilities and provide strategic remediation guidance. The role is suited for professionals with a deep understanding of both enterprise IT security and industrial/embedded system ecosystems.


Responsibilities

1-Vulnerability Assessment & Penetration Testing (IT + ICS/IIoT):

Perform black-box, grey-box, and white-box VAPT on:

  • Enterprise IT assets (servers, databases, web/mobile apps, Active Directory, cloud)
  • OT/ICS assets (PLCs, RTUs, HMIs, engineering workstations, protocol gateways)
  • IIoT platforms (MQTT/CoAP-based telemetry, edge gateways, cloud dashboards)
  • Emulate APT-level attacks across air-gapped, segmented, or hybrid IT-OT architectures.
  • Execute Red Team scenarios to simulate insider threats or supply chain compromise.


2- ICS Protocol & Field Device Security Testing:

Analyze and exploit vulnerabilities in ICS protocols:

  • Modbus TCP, DNP3, IEC 104, OPC-UA, S7comm, Profinet, BACnet, CIP (EtherNet/IP), MQTT, CoAP
  • Perform live traffic analysis, packet manipulation, and protocol fuzzing to test resilience.
  • Evaluate control logic vulnerabilities in ladder logic, structured text, and function blocks.


3- Firmware & Hardware Exploitation (IIoT/ICS Devices):

  • Extract and analyze firmware from industrial devices using JTAG, UART, SPI interfaces.
  • Perform static and dynamic analysis using Ghidra, Binwalk, Radare2, or IDA Pro.
  • Reverse engineer file systems (e.g., squashfs, cramfs) and analyze web interfaces or CLI backdoors.
  • Exploit misconfigured bootloaders, insecure firmware upgrade mechanisms, or exposed debug ports.


4- Network Architecture & Segmentation Testing:

  • Review and test IT-OT segmentation via firewall ACLs, VLANs, DMZ configurations.
  • Assess trust relationships, weak credential policies, and insecure remote access (e.g., exposed VNC, Telnet, RDP).
  • Identify unauthorized bridging of air-gapped networks or misconfigured routing/switching.


5- Cloud & IIoT Platform Security:

  • Evaluate MQTT brokers, edge-to-cloud telemetry, and analytics pipelines.
  • Test REST APIs, insecure mobile app integrations, and cloud misconfigurations (S3, IAM, IoT Core).
  • Identify insecure certificate handling, default API tokens, and lack of encryption at rest/in transit.


Reporting & Mitigation

  • Develop technical and executive-level reports with CVSS scoring, attack paths, and exploitation evidence.
  • Recommend hardening measures for both IT (patches, SIEM, EDR) and OT (control policy tuning, physical zoning, least privilege for operators).
  • Coordinate with ICS engineers, IT admins, and SOC teams for patch validation and monitoring upgrades.


Compliance & Framework Alignment

  • Ensure assessments comply with industry and regulatory frameworks:
  • NIST SP 800-82, ISA/IEC 62443, ISO 27001, NERC CIP, SANS ICS Top 20
  • Map findings to MITRE ATT&CK for ICS and monitor emerging CVEs relevant to industrial products.


Eligibility


Educational Background:

  • Bachelor’s or Master’s in Cybersecurity, Computer Science, Industrial Automation, Electronics, or a related field.


Technical Skills:

  • Deep knowledge of ICS/SCADA systems, embedded architectures, and real-time OS (VxWorks, QNX, FreeRTOS).


Hands-on experience with tools:

  • VAPT Tools: Nessus, Burp Suite, Metasploit, Nmap, Nikto, SQLMap
  • ICS Tools: Wireshark, Scapy, PLCScan, ICSFuzz, S7comm Tools, Conpot, ModScan
  • Firmware Tools: Binwalk, Ghidra, Radare2, OpenOCD, Logic Analyzers
  • IIoT Security: Shodan, Censys, MQTTX, Postman, OWASP ZAP


Certifications (Preferred):

  • OSCP, GRID, GICSP, CRT, CRTP, CEH, CISSP, or equivalent.
  • Participation in ICS/IoT-focused CTFs or open-source contributions is a plus.


Travel

As and when required, across the country for project execution and monitoring as well as for coordination with geographically distributed teams.


Communication

  • Submit a cover letter summarising your experience in relevant technologies and software along with a resume and the Latest passport-size photograph.

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