Principal Unix/Linux Systems Engineer

Location: McLean, VA (U.S. based). U.S. citizenship is required for all programs. All work must be performed within the continental United States. Role overview The Principal Engineering Lead works directly with Intelligence Community clients and acts as the primary technical liaison to the National Reconnaissance Office (NRO). This position leads a cross-disciplinary team, guiding both architecture and delivery for software and data platforms that support critical missions. The role shapes technical direction, influences design patterns, recommends tools, and provides advice on AI and machine learning strategies across several teams. What you will do Lead a cross-functional engineering team delivering solutions for Intelligence Community clients. Serve as Raft’s main technical representative to the NRO. Architect, build, and deploy software applications and data platforms at scale. Advise on design patterns, technology selection, and AI/ML approaches across teams. Work closely with problem solvers to address complex technical challenges. Requirements U.S. citizenship (required for all programs). Ability to work within the continental U.S. Extensive experience leading engineering teams and architecting large-scale solutions. Background in software application and data platform development, preferably for government or defense clients.

Join Appian, a leading software development company, as a Principal Workday Engineer. In this pivotal role, you will leverage your expertise in Workday to design, implement, and enhance solutions that drive business efficiency and success. Collaborate with cross-functional teams to deliver innovative solutions that meet our clients' evolving needs.

We are seeking a dedicated and skilled Systems Engineer to join our dynamic team at 360itprofessionals1. In this role, you will be responsible for designing, implementing, and maintaining complex systems that meet our clients' needs. Your expertise will contribute to the seamless integration of various technologies, ensuring optimal performance and reliability.You will collaborate with cross-functional teams to troubleshoot issues, develop solutions, and support system deployments. If you are passionate about technology and eager to work in a fast-paced environment, we want to hear from you!

Location requirement: This position is open only to U.S. citizens and requires all work to be performed within the continental United States. Raft is a defense technology company based in McLean, VA. The team partners with U.S. military and government agencies to deliver AI/ML and data solutions, specializing in areas such as autonomous data fusion, Agentic AI, distributed data systems, and scalable platforms. Raft’s cloud-native products support federal and public sector clients and reach millions of Americans. Role overview The Lead Principal Software Engineer joins a collaborative team focused on building a data-driven product. This role covers both backend and frontend development, drawing on open source technologies including Kafka, Trino, DuckDB, and Superset. The main objective is to create seamless data interactions and empower users to generate meaningful data stories with the product. Key technologies Kafka Trino DuckDB Superset

Astor & Sanders Corporation (Astor) is a prestigious IT solutions provider based in McLean, Virginia, recognized for delivering innovative technology services. We are currently in search of a Systems Engineer to join our dynamic team. This is a full-time position with a hybrid work model available in the Washington DC Metro area.Key ResponsibilitiesArchitect, develop, and manage cloud and virtualized infrastructures, guaranteeing optimal availability and scalability of systems.Configure and oversee load balancing devices to enhance traffic flow and system efficiency.Create, deploy, and support containerized applications alongside a microservices framework.Administer Oracle Databases and Middleware to ensure robust performance and security.Collaborate with software development teams to facilitate Java/J2EE applications.Support and maintain Windows and Linux application servers in both development and production settings.Utilize automation and configuration management tools including Ansible, Terraform, Airflow, and Liquibase for infrastructure management.Develop, maintain, and optimize AWS Lambda functions for serverless deployments.Assist in implementing business intelligence and reporting solutions.Effectively communicate complex technical ideas to both technical and non-technical audiences.Ensure secure operation of financial systems, adhering to compliance standards.Employ MS Office 365 tools for documentation and collaboration.Serve as a subject matter expert for cloud services and Oracle administration.Perform additional duties as required.

Join Agile Defense, Inc. as a Cloud Systems Engineer, where you will leverage your expertise in cloud technologies to design, implement, and manage innovative solutions that enhance our clients' operations. Collaborate with a dynamic team to deliver high-quality services and contribute to the modernization of cloud infrastructures.

Join Appian as a Principal Technical Consultant where you will leverage your technical expertise to deliver innovative solutions for our clients. You will play a pivotal role in guiding project teams, ensuring successful implementations, and fostering client relationships. Your deep understanding of our platform will empower you to drive solutions that meet client needs effectively.

Core One is actively seeking a highly skilled Principal Support Administrator to provide essential support to the US Government in the dynamic Northern Virginia area. This role demands a candidate with a current TS/SCI with Polygraph clearance. The Principal Support Administrator will play a critical role in efficiently managing the principal's calendar, addressing unscheduled demands, and preparing for meetings. Additionally, the position may involve coordinating and overseeing administrative support for other staff members within the principal's team.Key Responsibilities:Calendar Management: Effectively manage and schedule appointments by leveraging a deep understanding of the principal's responsibilities in relation to mission objectives. Collaborate with various internal and external contacts to resolve calendar conflicts.Principal Support: Prioritize urgent demands and discern which issues require the principal's attention, utilizing sound judgment and knowledge of agency priorities. Gather relevant information for the principal to address concerns and ensure timely follow-up on assigned actions.Liaison Duties: Act as a diplomatic liaison for the principal, engaging with personnel at all levels within and outside the organization. Communicate the principal's requirements and priorities clearly and courteously, whether verbally or in writing.

Join Appian as a Principal Consultant focused on the Public Sector, where you will leverage your expertise to drive transformative solutions for government entities. In this pivotal role, you will collaborate with clients to optimize their operations and implement innovative strategies using Appian’s cutting-edge technology.

Join our dynamic team as a System Architect, Interface Architect, or System Administrator in a fully remote capacity. In this role, you will leverage your expertise in systems design and administration to innovate and enhance our infrastructure. You will collaborate with cross-functional teams to ensure seamless integration and functionality of our systems, driving efficiency and effectiveness across the organization.

Raft is seeking a Principal MLOps Engineer to help build and scale advanced AI and data platforms for the Department of Defense. This position plays a key role in transforming large volumes of real-time sensor and operational data into actionable intelligence, supporting critical decision-making for operators through mission applications and operational displays. What you will do Advance mission-critical AI and data platforms that process billions of daily events with low-latency pipelines and cloud-native architecture. Support the development of an end-to-end machine learning platform for model development, evaluation, deployment, monitoring, and lifecycle management. Ensure the platform operates effectively across both cloud infrastructure and resource-constrained environments. Location This role is open to remote work within the United States as well as in DMV, McLean, VA, Boston, MA, San Antonio, TX, Colorado Springs, CO, Tampa, FL, and Honolulu, HI. Eligibility U.S. citizenship is required. All work must be performed within the continental United States.

Location: Remote (U.S.); DMV; McLean, VA; Boston, MA; San Antonio, TX; Colorado Springs, CO; Tampa, FL; Honolulu, HI Eligibility: U.S. citizenship required. All work must be performed within the continental United States. Raft delivers AI, machine learning, and data-driven solutions to U.S. military and government clients. The team specializes in autonomous data fusion, Agentic AI, distributed data systems, and building scalable platforms. Headquartered in McLean, VA, Raft partners with federal and public sector organizations to create digital solutions that reach millions of Americans, using design thinking and cloud-native technology. Role overview The Lead Principal MLOps Engineer plays a key part in supporting clients and collaborating with a team focused on complex, high-impact challenges. This position centers on building and maintaining mission-critical AI and data platforms for the Department of Defense. What you will do Work on platforms that process large volumes of real-time data from diverse sensors and operational sources. Transform raw data into actionable intelligence, supporting operators with timely decisions through mission applications and operational dashboards. Support a large-scale platform that manages billions of events daily, using low-latency data pipelines and cloud-native infrastructure. Advance the development of an end-to-end machine learning platform for model development, evaluation, deployment, monitoring, and lifecycle management across both cloud and constrained operational environments.

Location: McLean, Virginia Focus: Public Sector (DoD, Intel, Civilian agencies) Role Overview The Principal Solutions Architect at Appian shapes technical strategy for high-impact federal projects. This senior role builds technical credibility, influences acquisition strategies, and acts as a trusted advisor within government agencies. The position sits at the top of the Solutions Consultant career path, combining enterprise strategy, deal orchestration, and platform advocacy. Appian's SC 2.0 initiative is redefining pre-sales in the public sector. Solutions Consultants here work closely with clients to craft modernization strategies, ensure technical excellence, and maintain federal compliance. For more about SC 2.0, listen to our Global SC leader, Gregg Aldana, discuss it here. What You Will Do Orchestrate Complex Federal Deals & Growth Plans Lead technical strategy for multi-million-dollar public sector contracts, including Enterprise Growth Plans. Navigate complex acquisition processes, ensuring both compliance and alignment with agency missions. Coordinate with internal teams, partners, and executive stakeholders to secure technical wins at key federal agencies. Guide Federal Mission Strategy & Executive Engagement Serve as a strategic advisor to agency executives and senior leaders (SES, flag officers). Run visioning workshops, architecture reviews, and briefings that connect Appian to modernization and digital transformation efforts. Translate mission requirements into Appian-powered roadmaps focused on agility, resilience, and measurable value.

As a Principal Associate in our Cyber Security Operations Center (CSOC), you will play a pivotal role in safeguarding our organization's digital assets. You will be responsible for monitoring, detecting, and responding to security incidents while employing advanced threat detection methodologies. This position requires a blend of technical expertise, analytical skills, and the ability to work collaboratively in a fast-paced environment.

As a System Analyst at eproinc, you will play a pivotal role in analyzing, designing, and implementing innovative IT solutions that drive operational efficiency and enhance user experience. You will collaborate with cross-functional teams to gather requirements, define system specifications, and ensure the successful deployment of projects. Your analytical skills will be vital in identifying system issues and proposing effective solutions.

At Appian, we embody the values of Intensity and Excellence. Our commitment to high standards ensures that we approach every challenge with ambition and accountability. Join our passionate team dedicated to achieving remarkable results together.The Principal Security Analyst plays a pivotal role in guiding federal clients in the design, implementation, and maintenance of secure Appian-based solutions. This position demands a thorough understanding of cybersecurity principles, the government IT security authorization process, and proficiency in the NIST Risk Management Framework (RMF) and Authority to Operate (ATO) processes. The successful candidate will lead clients through the security authorization process, assist in developing secure architectures, and mentor junior analysts while working with cloud platforms such as Amazon Web Services (AWS) and Microsoft Azure.This role is based at our headquarters in McLean, VA, where in-person collaboration fosters a culture of success. Employees are expected to be in the office 4 - 5 days a week to maximize opportunities for teamwork and connection with exceptional colleagues.

About the Internship SpryMethods, Inc. is looking for an IT Operations & Systems Intern in McLean, VA. This role offers a chance to work directly with IT operations and systems management. Interns will gain practical experience with troubleshooting and learn how to support daily operational tasks. What You Will Learn Foundations of IT operations in a business environment Basic systems management techniques Approaches to troubleshooting and resolving technical issues Ways to support operational efficiency

Location: Remote (U.S. only), DMV, McLean, VA, Boston, MA, San Antonio, TX, Colorado Springs, CO, Tampa, FL, Honolulu, HI Clearance: U.S. citizenship required. All work must be performed within the continental U.S. Role overview The Principal MLOps Engineer will work with a team dedicated to building AI and data platforms for the Department of Defense. These platforms manage and process large streams of real-time data collected from various sensors and operational sources. The objective is to turn raw data into actionable intelligence, supporting operators with applications that enable fast, informed decisions. Raft’s systems run at scale, processing billions of events each day through low-latency data pipelines and cloud-native infrastructure. As AI capabilities grow, the engineering team is focused on expanding a comprehensive machine learning platform. This platform covers the full lifecycle: model development, evaluation, deployment, monitoring, and ongoing management, both in the cloud and in operational environments with limited resources. About Raft Raft is a defense technology company that supports U.S. military and government agencies with advanced AI/ML and data solutions. The team specializes in autonomous data fusion, Agentic AI, distributed data systems, scalable platforms, and complex application development. Based in McLean, VA, Raft partners with federal and public sector clients, using design thinking and cloud-native technology to deliver digital solutions that reach millions of Americans.

About the Role grvty is seeking a Geospatial Systems Administrator based in McLean, Virginia. This position manages and maintains geospatial systems, focusing on reliability and performance. The work supports grvty’s ongoing efforts to use geospatial data for better decision-making. What You Will Do Administer and optimize geospatial technologies and related infrastructure Monitor system health and address technical issues to minimize downtime Support the integration and use of geospatial data across teams Location This role is based in McLean, Virginia, United States.