CSS is a company founded on a set of guiding principles that include good old fashioned hard work, ethics, teamwork and innovation. We are always looking for professionals who possess these same principals and who are passionate about serving clients, expanding their knowledge, and contributing to the community.

We provide a challenging and meaningful workplace, where your experience and hard work are appreciated and where you are encouraged and supported as you fulfill your professional and personal aspirations. We know that our associates contribute to the success of the company. We value your talent, skills and knowledge; therefore, we provide you with a dynamic environment where you can excel, learn, share, innovate and succeed.

Open Positions

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Sr. Applications Developer (SharePoint Full-Stack Developer)

Washington, DC

Custom Software Systems, Inc. (CSS) is seeking a strong Sr. Applications Developer (SharePoint Full-Stack Developer) to work closely with our design/development leads to develop, test, and implement a ReacJS template powered by SharePoint 2016, and implement enhancements to an existing website.  The Sr.Applications Developer must be able to demonstrate working knowledge of SharePoint 2016, ReactJS, and modern best practices regarding separation of concerns (SoC). The Sr. Applications Developer ...

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Senior .NET Developer

Washington, DC

Custom Software Systems, Inc. (CSS) is seeking an experienced Senior .NET Developer to support, develop, maintain, test and deliver Full Stack based applications for a Major Financial Institution. The Senior .NET Developer needs to be a hybrid developer who is very experienced with both .NET C#, Angular, TFS, and SQL Server. The primary role for this position is a .NET Angular Developer.  Must be U.S. Citizen REQUIRED QUALIFICATIONS: ...

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Mainframe Programmer z/OS

Washington, DC

Customer Software Systems, Inc. (CSS) is seeking a very experienced senior SYSPROG to provide advanced support of z/OS upgrade. Must be U.S. Citizen  RESPONSIBILITIES: Responsibilities include hands on administration, configuration, maintenance, and monitoring of mainframe System z and related infrastructure components. Leading z/OS upgrade from v2.1 to v2.x and hardware upgrade from zBC12 to next generation machine ...

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Sr. Level Test Engineer (Functional)

Arlington, VA

Custom Software Systems Inc. is seeking a Sr. Level Test Engineer to work under minimal supervision, perform relatively routine tasks related to functional, 508 Compliance, regression, performance, load, end-to-end, information assurance, integration, and security testing using manual and automated test tools. The Sr. Level Test Engineer will write test procedures, investigate and analyzes test failures. The role also builds and maintains automated regression test suites and integrates them in ...

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Senior Enterprise Application Modeler/Developer – SP Interfaces

Arlington, VA

Custom Software Systems, Inc. is seeking a Senior Enterprise Application Modeler/Developer to manage the interface development, unit testing, deployment and integration of technical solutions for an internal system. The Enterprise Application Modeler will  provide data models from business systems planning and data requirements planning. This role is responsible for designing, developing, and supporting application solutions and re-engineered components based on client require ...

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Senior Enterprise Application Analyst- Designer

Arlington, VA

Custom Software Systems Inc. is seeking a Senior Enterprise Application Analyst/Designer to provide expertise to ensure functional business requirements and process issues are resolved using comprehensive enterprise applications solutions. This role will work with senior managers to identify and solve functional area issues, design solutions, develop conceptual models, translate functional area requirements into technical requirements, and support design and implementation of enterprise applic ...

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Principle EA Analyst/Designer

Arlington, VA

Custom Software Systems Inc. is seeking a Principle EA Analyst/Designer to provide expertise to ensure functional business requirements and process issues are resolved using comprehensive enterprise applications solutions. The Principle EA Analyst/Designer will work with senior managers to identify and solve functional area issues, design solutions, develop conceptual models, translate functional area requirements into technical requirements, and support design and implementat ...

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PeopleSoft HCM Functional Analyst

Arlington, VA

Custom Software Solutions Inc. is seeking a PeopleSoft HCM Functional Analyst to plan and manage system-wide analyses regarding the allocation of enterprise application functions.This role will manage analysis of system design in coordination with developers and business analysts. The Functional Analyst will provide expertise to ensure functional business requirements and process issues are resolved using comprehensive enterprise applications solutions. This role works with senior managers to ...

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PeopleSoft HCM Developer

Arlington, VA

Custom Software Systems, Inc. (CSS) is seeking a PeopleSoft HCM Developer who will lead and perform application development, configuration, and unit testing for a large-scale project. Participate in development, integration and deployment of solutions. The candidate will provide data models from business systems planning and data requirements planning and will be responsible for designing, developing, supporting application solutions and re-engineered components based on client requirements. T ...

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Oracle Identity and Access Management Engineer

Arlington, VA

Custom Software Systems Inc. is seeking an experienced Oracle Identity and Access Management Engineer to be a part of a System Integration Team, to support a web-based human resource system designed to provide, integrated, multi-component personnel, and pay capabilities. REQUIRED QUALIFICATIONS: Current Secret Clearance required; SSBI preferred Current Security and certification 5+ years' experience with  Oracle Identity and Access Manage ...

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ERP Functional Tester

Arlington, VA

Custom Software Systems Inc. is seeking an ERP Functional Tester to serve as a Jr/Mid Functional Test Engineer to perform tasks related to (functional, 508 Compliance, regression, performance, load, end-to-end, information assurance, integration, and security) testing of the PeopleSoft enterprise resource planning (ERP) system using manual and automated test tools. The ERP Functional Tester will write and execute test cases, investigate and analyze test results, build and maintain automated re ...

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Data Conversion Developer (PeopleSoft)

Arlington, VA

Custom Software Systems, Inc. (CSS) is seeking a Data Conversion Developer who will perform conversion development and unit testing for a large-scale project. He or she will participate in development, integration and deployment of solutions. This role is responsible for developing coding based on design specifications, existing modules, and direction from technical lead, including initial set up of development environment and documenting prototype and final solution. The Data Conversion Devel ...

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Senior Peoplesoft Administrator

Arlington, VA

Custom Software Systems Inc. is seeking a Senior PeopleSoft Administrator to provide system/PeopleSoft application administration support environments across multiple data centers. The Sr. PeopleSoft Admin will work with other PeopleSoft admins to design, implement and support all PeopleSoft HCM, CRM and ELM Development, Test, and Production Environments (NIPRNET and SIPRNET) within multiple data centers. Other responsibilities include providing PeopleSoft, third-party application, infrastruct ...

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