Network Security Architect

Gravity IT Resources

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Job Title: Network Security Architect
Location: Houston, TX (Remote eligible)
Job Type: Direct Hire  

– Design network architecture (Datacenter, Cloud, On-Prem, Field and OT)
– Plan, design, and implement, IT cybersecurity protection solutions.
– Plan, design, and implement, OT cybersecurity protection solutions.
– Perform engineering, design, and implementation of OT security solutions and products, including architecture reviews, vendor engagement, product evaluation, implementation, configuration, and testing.
– Provide engineering support, product management, lifecycle management, and solution architecture for OT security capabilities such as network security, threat and anomaly detection, vulnerability management, endpoint detection and response.
– Collaborate with other stakeholders to ensure the architecture is aligned with business requirements.
– Create the documentation “artifacts” of the architecture.
– Work with Infrastructure, Enterprise Applications, DevOps, Development Engineering, other domain architects, and internal stakeholders to identify the best solutions for known and anticipated constraints.
– Be the trusted technical advisor to Infrastructure, Enterprise Applications, and DevOps teams.
– Perform design and reviews with peers and stakeholders.
– Look for problems within the platform and its integrations and work to resolve issues.
– Ensure the architecture supports business processes, technologies
– Participate in incident response activities, including investigating security incidents, analyzing root causes, and coordinating remediation efforts.
– Conduct regular vulnerability assessments and penetration tests on systems and networks, identify weaknesses, and recommend security improvements.
– Implement and manage security controls specifically tailored to protect critical infrastructure assets in the oil and gas sector.
– Perform risk assessments and develop risk mitigation strategies to protect against cyber threats that could impact the safety and reliability of daily operations.
– Promote a culture of cybersecurity awareness and best practices among employees and contractors working in the oil and gas sector.
– Design, Manage and Configure security tools and technologies relevant to the protection of critical infrastructure.

  • 5+ years of experience in network security engineering, specifically with data center networking and cloud architecture.
  • 3+ years of experience designing and implementing ICS/OT systems.
  • Moderate/Expert level understanding of IT-OT convergence, Purdue Model, IDMZ concepts, network technologies, systems, and concepts.
  • Knowledge of ICS / SCADA System Security (design, controls)
  • Strong understanding of OT network communication protocols (e.g., Ethernet/IP, CIP, Modbus, OPC, etc.) and industrial networking topologies.
  • Experience working with cloud-based network infrastructures, such as AWS / Azure / GCP, including AWS Direct Connect and Azure Express Route.
  • Experience with Infrastructure as Code, CI/CD, and tools for orchestration and configuration.
  • Demonstrated experience with network protocols (BGP, OSPF, MPLS, VPLS, VRRP, GLBP, etc.)
  • Experience deploying Cloud/SDN/SD-WAN technologies.
  • Deep understanding of cloud security concepts, tools, and their integration with multimedia applications.
  • Experience with next-generation firewall technology (Palo Alto, Cisco, Juniper, etc.)
  • Demonstrated Experience with Cloud Security
  • Deep understanding of industrial control systems (ICS), PLCs, and SCADA environments.
  • Proficiency in deploying and configuring OT cybersecurity solutions.
  • Familiarity with industry standards and regulations related to critical infrastructure protection.
  • Strong documentation and diagramming skills ensure that all network topologies are accurately documented and recorded.
  • Experienced working with Ticking Systems and Change Control process adherence.
  • Excellent analytical, interpersonal, and communication skills with the ability to communicate complex technical issues in an easy-to-understand manner at all levels of the organization.
  • IDS / IPS, QoS, and traffic shaping policies and techniques.
  • Knowledge of IoT protocols, standards, and technologies.
  • Understanding of Cloud connectivity partners (Megaport, Equinix, Cloud Exchange, etc.)
  • Self-starter with strong organizational and time management skills, working within demanding timeframes.
  • Ability to work collaboratively with colleagues and staff to create a high-quality, results-driven, team-oriented environment.
  • Demonstrated ability to use discretion, make sound decisions, and maintain confidentiality.
  • Ability to handle high pressure situations in a productive and professional manner.
  • Strong analytical and problem-solving skills.

Nice to Have:

  • Microsoft Certified: Azure Solutions Architect Expert
  • Cisco Certified Network Professional (CCNP)
  • Cisco Certified Internetwork Expert (CCIE) / Cisco Certified Design Expert (CCDE)
  • OT/ICS cybersecurity relevant accreditations such as GISCP, Certified SCADA Security Architect (CSSA), ISA/IEC62443 cybersecurity certificates


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