Senior GUI Software Engineer with Security Clearance

Zachary Piper Solutions is seeking a Senior GUI Software engineer to support the maintenance, enhancement, and modernization of a mission-critical communications and command software platform. This role focuses on sustaining and improving a legacy graphical user interface application within a secure, operational environment. This position is 100% on-site located in Aberdeen Proving Ground, MD. This role requires an Active Secret Clearance. This job opens for applications on 11/5/2026. Applications for this job will be accepted for at least 30 days from the posting date. Responsibilities of the Senior GUI Software engineer will include:

• Maintain, troubleshoot, and enhance existing GUI-based software applications.
• Develop and modify software running in OpenVMS environments.
• Support legacy codebases written in Fortran 77.
• Design and maintain graphical user interfaces using X Windows (X11) and DECwindows Motif.
• Analyze software defects and implement corrective actions.
• Participate in software integration, testing, validation, and deployment activities.
• Collaborate with engineering teams to support system sustainment and modernization initiatives.
• Prepare technical documentation and support long-term maintenance efforts. Qualifications for the Senior GUI Software engineer include:
• 12+ years of professional software engineering experience.
• Bachelor's degree in Computer Science, Software Engineering, Computer Engineering, or a related technical discipline (or equivalent experience).
• Strong experience with: OpenVMS / VMS, DEC VAX systems, Fortran 77, X Windows (X11) and DECwindows Motif GUI development
• Experience supporting and maintaining legacy software systems in operational environments.
• Ability to work 100% onsite in a secure government facility.
• An active Secret Security Clearance Compensation for Product Security Engineer include:
• Salary: $130K-$190K+ depending on experience
• Medical, Dental, Vision, 401K, PTO, Sick Leave if required by law, and Holidays OpenVMS, VMS, DEC VAX, VAX/VMS, Fortran 77, Fortran Developer, X Windows, X11, X Window System, DECwindows Motif, Motif, GUI Development, Graphical User Interface, Legacy Systems, Legacy Software, Software Sustainment, Software Modernization, C++, C, Real-Time Systems, Mission-Critical Systems, Command and Control, C2 Systems, Communications Systems, Defense Industry, Department of Defense, DoD, Army, Federal Government, Secure Systems, Systems Integration, Software Testing, Software Maintenance, Embedded Systems, Satellite Communications, SATCOM, Strategic Communications, Systems Engineering, Application Maintenance, Unix, Linux, Software Engineer, Senior Software Engineer, Principal Software Engineer, Security Clearance, Secret Clearance, Active Secret Clearance, Cleared Professional, Government Contractor, Defense Contractor, Systems Developer, Technical Documentation, Software Lifecycle Management, Aberdeen Proving Ground, APG, Mission Systems, Operational Systems, Secure Lab Environment, Sherrill-Lubinski Graphical Modeling System, SL-GMS, Legacy GUI, Human Machine Interface, HMI, Software Troubleshooting, Software Integration, Configuration Management. #LI-onsite #LI-JF2