Mainframe Developer jobs in Washington

Help us modernize the financial infrastructure of the federal government by maintaining and evolving systems that process billions of dollars in critical payments every month. Supporting a major federal financial stakeholder, you will ensure the reliability of a massive general ledger system while d

Founded in 1995, ESN is a Small Disadvantaged Business (SDB), Service-Disabled Veteran-Owned Small Business (SDVOSB) and Veteran Owned Small Business (VOSB). ESN delivers trusted solutions that support our nation's defense. For more than two decades, we have been providing our military and governmen

Global ScienceTechnology, Inc. (GST), is seeking an individual to work as a **Scientific Analyst/Programmer** to provide software engineering support to NOAA's National Weather Service (NWS) Office of Observations (OBS). The individual will provide technical support to the NOAA National Weather Serv

Global ScienceTechnology, Inc. (GST) seeks an **SST Scientific Programmer** to support the NOAA. The NOAA/STAR SST Science Team uses the CoastWatch Utilities and CoastWatch Data Analysis Tool (CDAT) software. Additional functions in the CDAT tool are desired to improve SST science team activities. A

*PLC Controls Engineer (Contract) – Siemens** *Location:** Baltimore, MD (Onsite) *Contract Duration:** 10–12 weeks *Start:** ASAP *Overview** We are seeking an experienced *PLC Controls Engineer** to support a complex, multi-robot automation project at a customer site in the Baltimore area. This is

*Job Description** *Department Marketing Statement:** Join a mission-critical team within WMATA¿s Digital Modernization ¿ Service Delivery and Operations organization, where your expertise in Mobile Device Management directly supports frontline operations and enterprise connectivity. As an MDM Admin

Programmer - Consultant Remote: Columbia, SC About the Job Duration: Long term Contract Position Location: Remote: Columbia, SC Pay rate: Hourly Job ID: 10331 Overview: Client is seeking an experienced Senior Application Developer to support the ongoing maintenance, enhancement, and operational stab

JOB PURPOSE Reviews, analyzes, and modifies programming of applications systems including encoding, testing, debugging and documenting programs. Ensures that programs can be integrated in the applications systems. ESSENTIAL FUNCTIONS Duties and Responsibilities Designs, tests and debugs software app

Amentum is searching for a Top-Secret cleared Dev Ops Engineer to join our team in Washington, DC. You will be working in an organization that’s mission is to accelerate operations through data and new analytical insights. The entire section leverages agile and works to provide enhanced reporting an

Job Announcement Under the supervision of a senior systems analyst, this position participates in, or performs, all phases of systems analysis and development including feasibility studies, systems design, programming, testing implementation and maintenance related to Circuit Court automation hardwa

*JOB ID:** 721642BR *Date posted:** Mar. 23, 2026 *Description:** Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more — we can innovate, invest, inspire and integ

Clear Ridge Defense is seeking a TS/SCI cleared professional to serve as a Computer Programmer (Level III) in Quantico, VA. *Roles and Responsibilities** You will... Plan and execute no-notice and cooperative Red Team operations across enterprise, application, and cloud environments Identify and exp

*Job Title: Programmer Analyst – Web Applications** *Clearance Required: Public Trust** *Work location: Preferred one of the three following areas, otherwise remote is OK: Pascagoula, MS (Mobile, AL metro)** AOI is looking for a Programmer Analyst to develop and maintain progressive web applications

*A full-service HVAC controls, building automation, and energy management contractor** This Jobot Job is hosted by: Courtney Hoogervorst Are you a fit? Easy Apply now by clicking the "Apply Now" button and sending us your resume. Salary: $90,000 - $130,000 per year *A bit about us:** A full-service

*Description**The R&D DevOps Engineer is involved in the full life cycle of an application and is a critical team member of an agile R&D development process. This position works closely with IT and research team members to understand the stakeholder requirements that drive the analysis and d

(ID: 2026-1749) *Axle** is a bioscience and information technology company that offers advancements in translational research, biomedical informatics, and data science applications to research centers and healthcare organizations nationally and abroad. With experts in biomedical science, software en

Job Title: Programmer Analyst - Web Applications Clearance Required: Public Trust Work location: Preferred one of the three following areas, otherwise remote is OK: Pascagoula, MS (Mobile, AL metro) AOI is looking for a Programmer Analyst to develop and maintain progressive web applications. The wor

Your Impact Own your opportunity to work alongside federal civilian agencies. Make an impact by providing services that help the government ensure the well being and support of U.S. citizens. Job Description Applications Systems Analyst/Programmer - Senior Deliver simple solutions to complex problem

*About us** Creative Information Technology Inc (CITI) is an esteemed IT enterprise renowned for its exceptional customer service and innovation. We serve both government and commercial sectors, offering a range of solutions such as Healthcare IT, Human Services, Identity Credentialing, Cloud Comput

*CASA & CASA IN ACTION SYNOPSIS:** CASA’s mission is to create a more just society by building power and improving the quality of life in working-class: Black, Latino/a/e, Afro-descendent, Indigenous, and Immigrant communities. Our vision is a future where we stand in our own power, our families