Senior Security Engineer: Cloud, AI & Threat Defense

i3 Consulting; Chantilly (VA); On-site; USD 130,000 - 190,000; Full time

Job summary

i3 Consulting in Chantilly, VA seeks a Senior Security Engineer to secure enterprise apps, cloud environments, and critical infrastructure. You will lead security engineering across systems, design controls, and mentor peers while following cybersecurity requirements.

You will advance threat detection, incident response, and defense-in-depth, with hands-on work in AWS/Azure/GCP, SIEM, data architecture, and AI-enabled security.

Qualifications

• Bachelor's degree required.
• Minimum 8 years of experience securing applications, cloud platforms, networks, and enterprise infrastructure.
• Experience with cloud technologies such as AWS, Azure, or Google Cloud.
• Proficiency with security monitoring, logging, SIEM, and alerting tools.
• Strong understanding of network security, encryption, authentication, and access control technologies.
• Experience developing security policies, procedures, and technical documentation.
• Strong analytical, troubleshooting, and communication skills.
• Experience with in-house custom-developed applications and advanced AI, GenAI, and multi-model engineering.
• Data architecture expertise, including vector, graph, and multi-database orchestration.
• Experience with air-gapped, hybrid, and on-premise operational environments.
• Application development and integration knowledge, utilizing TypeScript, React, Python, FastAPI, and more.

Responsibilities

• Secure applications, cloud platforms, networks, and enterprise infrastructure.
• Lead incident response, cyber resiliency, vulnerability management, and threat detection efforts.
• Design and implement security controls and support cloud-based platforms such as AWS, Azure, or Google Cloud.
• Utilize security monitoring, logging, SIEM, and alerting tools effectively.
• Develop security policies, procedures, and technical documentation.
• Provide technical mentorship and ensure alignment with defense-in-depth principles and security policies.
• Engage in multi-model and multi-modality orchestration, including advanced AI implementations and data architecture.
• Manage enterprise infrastructure and cross-domain solutions, including air-gapped and hybrid environments.
• Develop and integrate applications with modern programming languages and frameworks.

Skills

Incident response

Threat detection

Cloud security

Security monitoring

SIEM

Security policies

Technical mentorship

TypeScript

React

Python

FastAPI

Data architecture

Education

Bachelor's degree

Tools

AWS

Azure

Google Cloud

SIEM tooling

Job description

i3 Consulting in Chantilly, VA seeks a Senior Security Engineer to secure enterprise apps, cloud environments, and critical infrastructure. You will lead security engineering across systems, design controls, and mentor peers while following cybersecurity requirements.

You will advance threat detection, incident response, and defense-in-depth, with hands-on work in AWS/Azure/GCP, SIEM, data architecture, and AI-enabled security.