Senior Active Directory & PKI Automation Engineer (Tier 0)

STI; Spring (TX); On-site; USD 120,000 - 170,000; Full time

Job summary

Exxon is seeking an experienced IT security engineer to harden and automate identity infrastructure. The role blends automation and operations ~50/50, focusing on AD, PKI, and ADFS at enterprise scale with Tier 0 access.

Candidates should have 5+ years in high-security environments and hands-on experience with PowerShell and Terraform to drive automation. You will operate under strict controls, support audit/compliance, and deploy infrastructure via code.

Qualifications

• 5+ years PowerShell experience in production environments.
• 2–3+ years Terraform experience for IaC and pipelines.
• Deep operational judgment in high-security enterprise environments.

Responsibilities

• Automate and maintain scripts using PowerShell.
• Deploy and manage infrastructure via Terraform (IaC).
• Operate in a 50/50 automation/operations split within secure environments.
• Adhere to audit, compliance, and privileged access requirements.

Skills

Active Directory

Active Directory Certificate Services

Public Key Infrastructure

Active Directory Federation Services

5+ years PowerShell

2–3+ years Terraform

Tier 0 Security Experience

Tools

PowerShell

Terraform

Job description

Exxon is seeking an experienced IT security engineer to harden and automate identity infrastructure. The role blends automation and operations ~50/50, focusing on AD, PKI, and ADFS at enterprise scale with Tier 0 access.

Candidates should have 5+ years in high-security environments and hands-on experience with PowerShell and Terraform to drive automation. You will operate under strict controls, support audit/compliance, and deploy infrastructure via code.