Senior System Engineer (Email Security Migration) System OneSenior System Engineer (Email Security Migration)Washington, DCResponsibilities : • Lead the migration from on-premises IronPort email security appliances to Proofpoint cloud-based email security solution, ensuring seamless transition with minimal disruption to email services. System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America.
NewIntern, Manufacturing Engineer L3Harris TechnologiesIntern, Manufacturing EngineerMillersville, MD$25.50–$48 / hourThe Manufacturing Intern will assist in supporting the production of high-reliability electronic hardware for Tactical Satellite equipment, including SMT(Surface Mount Technology) solder assembly, mechanical integration, and environmental testing. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.
NewProgram Chief Engineer L3Harris TechnologiesProgram Chief EngineerMillersville, MDThe Chief Engineer is responsible for shaping, developing, and leading an engineering team in execution of the Engineering content of the program and will be the primary program engineering representative for that program to the SBS Business Unit, working closely with the SBS Chief Engineer and General Manager. Technical leadership of a cross-functional engineering team throughout the full program lifecycle including design, development, manufacturing, formal hardware/software qualification, integration and test, transition to production, and production support.
Active Directory Architect / Engineer LeidosActive Directory Architect / EngineerSilver Spring, MD$131,300–$237,350Design, deploy, upgrade, and administer Active Directory Domain Services, including domain controllers, forests, domains, trusts, and replication topologies (i.e. Manage and optimize Group Policy Objects (GPOs), OU structures, and security baselines; including object management through bulk operations and automation, Troubleshoot and resolve complex AD-related issues, including authentication failures, replication problems, DNS issues, and Kerberos/NTLM problems, Plan and execute Active Directory migrations, consolidations, and upgrades (of both underlying server infrastructure and overall forest/domain functional levels), Develop and maintain disaster recovery, backup, and restore procedures for AD environments (including AD Recycle Bin and authoritative restores), Monitor AD health and performance using tools such as Microsoft System Center, Azure Monitor, or third-party solutions). Deep expertise in designing, deploying, upgrading, and administering Microsoft Active Directory Domain Services (AD DS), including domain controllers, multi-domain/forest architectures, trusts, replication topologies, Group Policy Objects (GPOs), OU design, and security baselines.
Cloud Architect / Engineer LeidosCloud Architect / EngineerWashington, DC$131,300–$237,350Proven expertise with Generative AI infrastructure, including: Production-ready Retrieval-Augmented Generation (RAG) pipelines, Scalable vector databases (e.g., Pinecone, Weaviate, Milvus, FAISS, or managed services) with indexing, clustering, and optimized retrieval, GPU/TPU compute clusters, managed container orchestration (Kubernetes/EKS/AKS/GKE), and auto-scaling for large language model (LLM) workloads. Demonstrated experience implementing enterprise security and compliance frameworks (SOC 2, ISO 27001, HIPAA, PCI-DSS, CMMC, FedRAMP, etc.), including encryption, threat monitoring, and zero-trust architectures.
Solution Architect / Engineer LeidosSolution Architect / EngineerCheltenham, MD$131,300–$237,350This role combines high level architectural design with deep technical implementation, requiring an individual who can define target-state architectures, build and optimize solutions, and guide modernization across hybrid and multi cloud environments. Proven hands-on experience designing and implementing solutions across hybrid/multi-cloud environments (AWS and Azure strongly preferred), on-premises data centers, virtualization platforms, and containerized workloads (e.g., Kubernetes/Docker).
NewRf Engineer ActalentRf EngineerHyattsville, MD$100,000–$140,000 / hourThe role involves frequent use of laboratory equipment such as network analyzers, spectrum analyzers, oscilloscopes, and software-defined radio platforms, as well as development work in Linux-based systems and Python-driven analysis tools. We are proud to be an Engineering News-Record (ENR) Top 500 Design Firm for our engineering design services and a ClearlyRated Best of Staffing® winner for both client and talent service.
Endpoint Engineer LeidosEndpoint EngineerBowie, MD$87,100–$157,450Ensure proper OS images are deployed to all endpoint devises, test and manage software updates, ensure appropriate and enforce security policies (EDR/AV), and automate workflows to ensure stable, compliant, and efficient computing environments for endpoint migrations. The Defense Enclave Services contract will unify the DoD Fourth Estate Defense Agencies and Field Activities’ (DAFAs) common use information technology systems, personnel, functions, and program elements under the direction of DISA’s Fourth Estate Network Optimization program office.
NewPrincipal Cybersecurity Engineer- Architecture OneMain FinancialPrincipal Cybersecurity Engineer- ArchitectureBaltimore, MD$130,000–$156,000 / yearAlong with security platform mastery in more than one platform area (IDS/IPS, firewall/WAF, access and identity, malware defense, threat modeling, exposure management, among others), the Principal Cybersecurity Engineer is formally trained in enterprise IT design and architecture practices. The Principal Cybersecurity Engineer has a demonstrated mastery in multiple security and non-security technology platforms, with the ability to both lead and advise on the overall designs and strategies of both security and non-security technologies.
Senior Network Engineer LeidosSenior Network EngineerAccokeek, MD$107,900–$195,050The Senior Systems Engineer will provide technical leadership and support in the areas of IT planning, solution specification/design, implementation and target architecture development for the AFNCR Consolidated Communication Center (CCC). If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
NewTelecommunications Engineer (RCDD) TEKsystemsTelecommunications Engineer (RCDD)Laurel, MD$62.50–$72.11 / hourThe Telecommunications Network Engineer will include but not be limited to PDS (Protected Distribution Systems) assessment, DOD compliance, network design, quality control, site scheduling/coordination, team lead, and internal IT team coordination. The Telecommunications Network Engineer will include but not be limited to PDS assessment, DOD compliance, network design, quality control, site scheduling/ coordination, team lead, and internal IT team coordination.
Lead Systems Integration Engineer LeidosLead Systems Integration EngineerGlenwood, MD$87,100–$157,450TFDM program is a Federal Aviation Administration’s (FAA) NextGen program based on airport surface management provides that efficiencies for both the airport surface and terminal airspace by providing a new and comprehensive integrated surface traffic control and management system. June 3, 2026For U.S. Positions: 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.
NewEmbedded Software Engineer ActalentEmbedded Software EngineerBaltimore, MD$55–$120 / hourThe position requires strong C++ and object‑oriented programming skills, experience with Linux and real‑time operating systems, and the ability to perform hands‑on testing and debugging on embedded hardware in support of high‑reliability defense applications. Due to the nature of the programs and cleared systems involved, this position requires working onsite five days per week to access secure servers and hardware used on government programs.
NewSoftware Engineer ActalentSoftware EngineerColumbia, MD$38.46–$62.50 / hourEngineers benefit from a smaller company atmosphere where they can take on meaningful responsibilities, engage deeply with complex technical challenges, and participate in customer-facing activities, including occasional travel to customer sites for testing and integration. The environment emphasizes agile development practices, peer reviews, and close collaboration within a small engineering team, providing high visibility into programs and a clear line of sight between your work and its impact on mission-critical defense systems.
Systems Engineer LeidosSystems EngineerTemple Hills, MD$107,900–$195,050If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com. • The candidate should be a proactive leader and team player with strong communication, management, analytical, and problem solving skills; proven ability to thrive in environments that constantly embraces new technology.
Lead Systems Engineer LeidosLead Systems EngineerWashington, DC$107,900–$195,050If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com. June 22, 2026For U.S. Positions: 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.
NewControls Engineer 4 ActalentControls Engineer 4Baltimore, MD$125,120–$187,680 / yearYour expertise will be applied across various applications, including industrial controls, cybersecurity, building automation, water/wastewater, power controls and protection, energy management, and transportation systems. We are proud to be an Engineering News-Record (ENR) Top 500 Design Firm for our engineering design services and a ClearlyRated Best of Staffing® winner for both client and talent service.
Senior Systems Engineer LeidosSenior Systems EngineerLaurel, MD$131,300–$237,350This may include decomposing features into workable stories, prioritizing or reprioritizing items in the backlog for upcoming sprints, refining acceptance criteria and complexity estimates or removing tickets that are no longer relevant. Leidos has an exciting opening for you, as our next TS/SCI cleared Senior Systems Engineer, to play a critical role with design, engineering, development and deployment of software supporting the DIA-NMEC (National Media Exploitation Center) DOMEX Technology Platform (DTP).
NewLevel 3 Mac Desktop Engineer Sparks GroupLevel 3 Mac Desktop EngineerWashington, DC$43–$48 / hourThis role is ideal for a solution-driven professional who not only supports Mac users at an advanced level but also architects and improves endpoint management systems with a focus on scalability, automation, and security. You will serve as a subject matter expert (SME) for macOS, Jamf Pro, and Microsoft 365 within the enterprise environment, and play a critical role in enhancing the end-user experience through strategic IT initiatives.
NewSr. Specialist, Systems Engineering L3Harris TechnologiesSr. Specialist, Systems EngineeringMillersville, MD$106,500–$197,500 / yearCollaborate with other Systems Engineers in the development of work products, including: System Specifications, Logically Derived and Linked Requirements, Interface Definitions, System Diagrams, Systems Analyses, Trade Studies, and Detailed Designs. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.