8 senior software systems engineer jobs found

ECS is seeking a Junior Software Engineer Intern to work in our Fairfax, VA office for the summer of 2026. This internship offers a unique opportunity to move beyond the classroom and gain firsthand experience with production-grade workflows and real-world datasets. You will work alongside senior engineers and scientists to move models from research to the tactical edge, ensuring from end to end, both our warfighters & decision makers are empowered with the latest technology solutions at their fingertips. Job Description: ECS is seeking a Junior Software Engineer to participate in a team of scientists and engineers, and to support the execution of a variety of projects including Artificial Intelligence/Machine Learning and Big Data/Cloud Solutions. The candidate works closely with the Project Manager and technical team to swiftly develop solutions in an agile environment and deploy capabilities to the operational end user. The candidate cultivates an environment...

ECS is seeking a Systems Engineer Senior to work in our Winchester, VA office. Please Note: This position is contingent upon contract award. Supervise, coordinate and/or perform additions and changes to network hardware and operating systems, and attached devices, including investigation, analysis, recommendation, configuration, installation, and testing of new network hardware and software. Provide direct support in the day-to-day operations on network hardware and operating systems including the evaluation of system utilization, monitoring response time and primary support for detection and correction of operational problems. Troubleshoot at the physical level of the network, working with network measurement hardware and software, as well as physical checking and testing of hardware devices at the logical level working with communication protocols. Participate in planning design, technical review and implementation for new network infrastructure hardware and...

ECS is seeking a Senior Electrical Engineer to join the RPL team in Chantilly, VA . As a Senior Electrical Engineer, you will work on high performance RF systems used for Radar and Flight Termination System (FTS). Based on system requirements, you will collaborate with a multidisciplinary engineering team of RF Engineers, Mechanical Engineers, and Software Engineers, to derive solutions, perform verification testing, and troubleshoot any issues. A successful candidate will solve complex problems and complete hardware and firmware designs and perform hands on testing.

ECS is seeking an Identity Credential and Access Management (ICAM) Subject Matter Expert (SME)/Engineer to work in our Ft. Meade, MD office in an onsite capacity. ECS is seeking an ICAM SME/Engineer (ICAM SME/E) to support robust Impact Level (IL) 5 and IL6 programs in an operational DoD environment that houses multiple U.S. Coalition Mission Partner Environments (MPE). The ICAM SME/E will help clients understand emerging technical solutions relative to client policies and operational requirements and apply analytical and innovative strategies to develop solutions to address client needs. The candidate will contribute to technical artifacts and thought leadership for IAM tools relating to Credential Management, Public Key Infrastructure, Alternate Credentials, Directory Services, Authentication solutions, and ICAM integrations. This position is a demanding, high-energy role that requires innovative ideas to manage identities, credentials, and access across Mission...

ECS is seeking a Senior Engineer III (Part-Time) to work in our Warner Robins, GA office. ECS is seeking a highly qualified Senior Engineer III with an active Top Secret Clearance/SCI to work part time on our project at Robins Air Force Base, GA. The selected candidate will be able to communicate effectively (written/verbal), possess strong interpersonal skills, be self-motivated, and be innovative in a fast-paced environment. Must hold and maintain a valid Top Secret Security/SCI Clearance. The candidate will be involved with product sustainment, product development, lab support, and engineering services in support of the Operational Flight Program (OFP), Test Program Set (TPS) development and support, Intelligence, Surveillance and Reconnaissance software and Mission Support (MS) business lines within the Software Maintenance Group. Candidate will assist in evaluating current systems, planning of large-scale system projects. Essential Functions and Responsibilities:...

ECS is seeking a Senior SIGINT System Engineer to work in our Warner Robins, GA office. ECS is seeking a highly qualified Senior SIGINT System Engineer with an active Top Secret/SCI Clearance to work on our project at Robins Air Force Base, GA. The selected candidate will be able to communicate effectively (written/verbal), possess strong interpersonal skills, be self-motivated, and be innovative in a fast-paced environment. Must hold and maintain a valid Top Secret/SCI Security Clearance. The candidate will be involved with product sustainment, product development, lab support, and engineering services in support of the Operational Flight Program (OFP), Test Program Set (TPS) development and support, Intelligence, Surveillance and Reconnaissance software and Mission Support (MS) business lines. Candidate will assist in evaluating current systems, planning of large-scale system projects, purchasing, installing and support of network communications, including LAN/WAN...

ECS is looking for a Principal Systems Engineer - Embedded Software Engineer to work Onsite in Arlington, VA. The Principal Systems Engineer will provide senior-level technical oversight, quality assurance, and lifecycle governance for embedded tactical software supporting Department of Defense and Navy weapon and combat systems. This is a principal individual-contributor role focused on reviewing, validating, and auditing embedded software and engineering decisions-not people management or day-to-day software development. The ideal candidate has deep experience in safety-critical, highly regulated environments such as missile systems, Aegis or Navy combat systems, or other real-time defense platforms, and brings the technical judgment needed to independently assess software quality, integration impacts, and engineering rigor. What You'll Do Serve as a senior technical authority on Change Control Boards (CCBs) governing embedded software updates and configuration...

ECS is seeking a Military Analyst to work onsite, at the Pentagon. The ideal candidate will provide expert technical and operational analysis of Unmanned Aircraft Systems (UAS) threats and the effectiveness of counter-measure technologies. This role involves evaluating emerging drone threats, assessing defensive system performance, and developing Tactics, Techniques and Procedures (TTPs) to protect personnel and critical infrastructure. Candidates must be able to take ownership of tasks and deadlines; work without supervision; commit to high quality results; and provide common sense technical solutions. Must have an exceptional ability to multitask and manage multiple project streams simultaneously. In addition, candidates should be adaptable, detail-oriented, and have well-developed written, verbal, and interpersonal skills. Key Responsibilities: Threat Analysis: Monitor and analyze global UAS trends, loitering munitions and swarm technology. System Evaluation: Assess...