**Description** The Digital Modernization Sector at Leidos currently has an immediate need for an experienced **Software Integration Engineer IV (SIE IV)** for a new customer on a strategic High-Performance Computing (HPC) program. The SIE IV need to be a self-starter with excellent analytical and problem-solving skills, flexibility, good judgment, and the ability to work within a team to mature the HPC capabilities of our customer. **Primary Responsibilities:** + Provide customer support for HPC software to enable High Performance Computers to continue to run in operations, and support the range of UNIX, LINUX, Windows Systems, desktop applications, servers, and networks required in support of the mission. **Basic Qualifications:** + Must possess a TS/SCI clearance with polygraph + Candidates shall have a bachelor’s degree in computer science or related field and twelve (12) years of experience with integrating, installing, configuring, upgrading, compiling and supporting COTS/GOTS software in a heterogeneous operating system environment, or a master’s degree with ten (10) years of experience. + In lieu of a bachelor’s degree, the individual shall have fi (5) years of full-time computer science experience and at least ten (10) years integrating, installing, configuring, upgrading, compiling and supporting COTS/GOTS software in a heterogeneous operating system environment. An industry recognized professional certification as listed below may substitute as one (1) year experience. + Candidate shall be proficient with the following: + Linux Shell scripting + Object Oriented Programming Language (C, C++, Java) + Python Programming + GCC compiler + Multi-threadedsoftware + Parallel processing + CORBA, J2EE + Perl or JavaScript + Working knowledge of Configuration Management tools + Structuredtroubleshootingskills + System installation and working with HPC GOTS scheduler and resource management software. + IAT Level II Certification Required. Accepted professional IAT Level II certifications include RHCSA or higher Red Hat certification, and/or VMWare certification. **Original Posting Date:** 2025-02-07 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 $126,100.00 - $227,950.00 The Leidos pay range for this job level is a general guideline onlyand 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. REQNUMBER: R-00153054-OTHLOC-PL-2D3519 All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.