Senior Software Developer, Systems Software

IronMountain Solutions • Arlington, VA

10d • Onsite

About The Position

IronMountain Solutions, Inc. is seeking a Senior Software Developer, Systems Software to support the Department of Homeland Security (DHS) Cybersecurity and Infrastructure Security Agency (CISA). This role will serve as a technical lead for the operations, maintenance, and enhancement of the Critical Infrastructure Information Sharing Environment (CI-ISE) and Homeland Security Information Network (HSIN-CI) platforms. The position is not funded and is contingent upon contract award.

Requirements

• Expert-level proficiency in Drupal architecture, module development, and site configuration.
• Deep understanding of secure platform design within SBU/FOUO environments.
• Advanced skills in API integration, web services, and content management frameworks.
• Strong capability in platform performance optimization, troubleshooting, and scalability.
• Minimum of eight (8) years of professional experience in web or platform development.
• Minimum of three (3) years of experience developing and managing Drupal-based platforms.
• Active Drupal certification or Government-approved equivalent credential is required.
• Bachelor’s degree in Computer Science, Information Technology, Software Engineering, or a related field.
• Must be able to obtain and maintain a DHS Suitability / Public Trust or Entry on Duty (EOD) approval.
• U.S. citizens are eligible for this level of clearance.

Responsibilities

• Lead the technical architecture, module development, and configuration of Drupal-based web platforms supporting critical infrastructure information sharing.
• Design, implement, and maintain secure platform architectures within Sensitive But Unclassified (SBU) and For Official Use Only (FOUO) environments.
• Build and maintain seamless API integrations and content management frameworks across CISA/HSIN platforms.
• Optimize platform performance and scalability to ensure high availability for rapid operational and emergent event requirements.
• Enforce strict content governance and site hygiene by developing technical solutions to identify and remediate stale or duplicative content.
• Ensure all platform updates, interfaces, and deliverables achieve 100% compliance with Section 508 accessibility standards.
• Support Continuous Integration/Continuous Delivery (CI/CD) pipelines to deploy secure and tested code updates to the production environment.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior