Sr. Appian Systems Administrator

Join us in transforming how technology serves those who serve. At Leidos, we're not just delivering solutions – we're pioneering the future of defense and intelligence technology. Our diverse teams of innovators unite around a singular purpose: empowering our customers to succeed in their critical missions. We believe in leading with integrity, investing in our communities, and building sustainably for tomorrow. Shape the future of digital defense. Our Digital Modernization sector is at the forefront of next-generation technology, architecting cutting-edge solutions in cyber defense, logistics optimization, security operations, and decision intelligence. We're the minds behind the mission-critical systems that keep our nation secure. Ready to engineer solutions that matter? Primary Responsibilities: The Digital Modernization Sector at Leidos is seeking a dynamic Sr Appian System Administrator to support cloud modernization initiatives for the United States Coast Guard (USCG) at Command, Control, Communication, Computer, Cyber, and Intelligence Service Center (C5ISC) in the Alexandria, VA area. This role is part of a high-impact program focused on delivering secure, scalable cloud solutions that enable operational agility and resilience across the USCG enterprise. As the Appian System Administrator, you will have strong expertise in Appian platform administration. This role also includes responsibility to support the administration, maintenance, optimization, and governance of enterprise low-code/no-code platforms. The ideal candidate will also have experience supporting or integrating other low-code/no-code solutions such as ServiceNow, Microsoft Power Platform, Pega, Salesforce, OutSystems, Mendix, or similar platforms. Key Responsibilities: Administer and maintain the Appian platform across development, test, staging, and production environments. Manage Appian upgrades, patches, deployments, backups, and disaster recovery processes. Configure and maintain: User access and security roles Authentication (SSO, LDAP, SAML, OAuth) Infrastructure and environment settings Monitoring and alerting Troubleshoot platform issues, performance bottlenecks, and integration failures. Support CI/CD processes and deployment automation for Appian applications. Collaborate with developers, architects, infrastructure teams, and business stakeholders. Establish and enforce governance standards, operational procedures, and best practices. Monitor system health, capacity planning, and platform performance metrics. Support integrations with enterprise systems, APIs, databases, and cloud services. Participate in platform modernization and low-code/no-code strategy initiatives. Provide administration and operational support for additional low-code/no-code platforms where applicable. Basic Qualifications: Requires BS and 8+ years of prior relevant experience or Masters with 6+ years of prior relevant experience, additional years of experience will be accepted in lieu of a degree. 3+ years of experience administering and supporting Appian platforms in enterprise environments. Strong knowledge of: Appian platform architecture and components Environment administration and platform health monitoring Application migration and deployment processes across development, test, and production environments Security administration, user provisioning, and role-based access controls Appian platform upgrades, patching, maintenance, and high-availability configurations Experience supporting at least one additional low-code/no-code platform, such as: Microsoft Power Platform ServiceNow Pega Salesforce Platform UiPath Experience troubleshooting and resolving platform, application, and integration issues within production environments. Familiarity with: Windows and/or Linux server administration Cloud environments such as AWS, Azure, or Google Cloud Platform (GCP) SQL databases and database connectivity REST and SOAP APIs DevOps practices and CI/CD pipeline tools (e.g., Azure DevOps, Jenkins, GitLab) Experience supporting platform security, compliance, patch management, and operational best practices. Strong analytical, problem-solving, and troubleshooting skills. Excellent verbal and written communication skills, with the ability to effectively document processes, procedures, and technical solutions. Ability to work collaboratively across infrastructure, development, cybersecurity, and business stakeholder teams. Preferred Qualifications: Appian Certified System Administrator certification. Experience with containerized or cloud-native deployments. Knowledge of infrastructure automation tools. If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares. Original Posting: June 10, 2026 For 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. Pay Range: Pay Range $92,300.00 - $166,850.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit Pay and Benefits Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here. Securing Your Data Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to View email address on click.appcast.io. Commitment and Diversity All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.