ATO SI&T Lead

Parsons Corporation•Boulder, CO

About The Position

Parsons is seeking a talented ATO System Integration and Test (SI&T) Lead to join our growing team! In this role you will serve as the technical authority for integrated system security verification and System Integration & Test (SI&T) activities that produce objective evidence supporting Authorization to Operate (ATO) decisions for a next-generation national security space ground segment.

Requirements

Bachelor’s degree in Engineering, Computer Science, Information Systems, or related STEM field.
Active Top Secret clearance with SCI eligibility.
10+ years of experience in system integration and test, verification and validation, or developmental/operational test on national security systems.
Experience generating test evidence used in an ATO or equivalent authorization decision.
Strong understanding of test engineering, security assessment, and defect management.

Nice To Haves

Experience supporting space or mission-critical defense systems.
Hands-on experience with security testing tools and automated testing frameworks.
Familiarity with RMF, SCA processes, and cybersecurity standards.
Experience supporting IATT-to-ATO transitions or readiness events.

Responsibilities

Plan and execute integrated SI&T activities verifying secure system functionality and behavior under operational conditions.
Develop SI&T strategies, test plans, and procedures validating secure system operation and mission workflows.
Define security verification criteria and objective evidence required for authorization decisions.
Coordinate integration of security mechanisms across platforms, networks, and mission applications and verify performance during system-level testing.
Oversee security testing events including control testing, vulnerability scanning, penetration testing, and operational demonstrations.
Develop and execute negative, misuse, and degraded-mode testing scenarios.
Coordinate with engineering and operations teams to resolve defects and close findings.
Produce test evidence and reports supporting accreditation artifacts (SSP, SAR, POA&M).
Serve as primary interface to leadership and stakeholders regarding readiness and risks