Software Test Engineer TS/SCI Polygraph at Leidos in Hanover, MD

Leidos has a new and exciting opportunity for a Software Test Engineer in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management.

At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security!

Leidos is seeking a Software Test Engineer to support testing for an Enterprise ICAM system as part of a cross-functional Agile team. Our ideal candidate will design, execute, and document manuals and automated tests; develop test cases and automation frameworks; identify and track defects; analyze performance and system behavior; and perform continuous functional, integration, acceptance, and regression testing to ensure quality and backward compatibility.

Primary Responsibilities: • Collaborate with software engineers to design effective test strategies, test cases, and quality assurance approaches • Develop and maintain automated testing frameworks, test harnesses, and both manual and automated test solutions • Execute and manage functional, regression, integration, and acceptance testing across system lifecycles • Identify, document, track, and help resolve defects while analyzing test results for performance, load, and reliability issues • Test applications in Windows and Linux/CentOS environments using tools such as Behave, SoapUI, JUnit, and others • Apply knowledge of REST APIs, JSON/XML, scripting languages, version control systems, SQL, and related technologies in testing processes • Communicate technical findings clearly while working independently and within Agile teams to prioritize tasks and ensure compliance (including Section 508 accessibility)

Basic Qualifications • TS/SCI Clearance with polygraph on day one (no exceptions) • Bachelor's Degree or higher in computer engineering or in a field related to computer engineering or computer science disciplines is required. 5+ years of software engineering experience is required. 2+ years’ work experience in SIGINT, IA, or IT domains is required. 4 years of software engineering experience may be substituted for a bachelor’s degree, for a total of 9 years.

At Leidos, the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us, helping you grow your career is good business. We look forward to learning more about you – apply today

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

May 6, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $87,100.00 - $157,450.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.