Sr. Appian Systems Administrator

Leidos

Alexandria, Virginia

JOB DETAILS
SKILLS
Access Control, Administrative Skills, Amazon Web Services (AWS), Analysis Skills, Application Integration, Application Programming Interface (API), Authentication, Automation, Best Practices, Business Operations, Capacity and Performance Management, Cloud Computing, Communication Skills, Computer Security, Continuous Deployment/Delivery, Continuous Integration, Data Recovery, Defense Intelligence, DevOps, Disaster Recovery, DoD Secret Clearance, Environmental Issues, GCP (Good Clinical Practices), Green Construction, High Availability, Identify Issues, Intelligence Agencies, Internet Security, Jenkins, LDAP (Lightweight Directory Access Protocol), Leading Edge Technology, Legal, Linux Administration, Logistics, Microsoft Product Family, Microsoft Windows Azure, Microsoft Windows Server, OAuth, Operational Support, Operations Processes, Performance Metrics, Presentation/Verbal Skills, Problem Solving Skills, Production Systems, REST (Representational State Transfer), SOAP (Simple Object Access Protocol), SQL Databases, Salesforce.com, Security Assertion Markup Language (SAML), ServiceNow, Single Sign-On (SSO), Software Patches, Strategic Planning, Systems Administration/Management, Team Player, Test Plan/Schedule, Theater Production, United States Citizen, United States Coast Guard (USCG), Writing Skills
LOCATION
Alexandria, Virginia
POSTED
14 days ago

​​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? 

Clearance: Must currently hold an active DOD Secret clearance. Must be a US Citizen.

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.
  • Must currently hold an active DOD Secret clearance.
  • 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.

About the Company

L

Leidos

Everything we do is built on our commitment to do the right thing for our customers, our employees, and our communities. Learn more about the values and culture that are the foundations of our business.
COMPANY SIZE
10,000 employees or more
INDUSTRY
Engineering Services
FOUNDED
1969
WEBSITE
http://leidos.com/