Sr Appian Platform Engineer​/Architect

Description

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?

The Digital Modernization Sector at Leidos is seeking a dynamic Sr Appian Platform Engineer / Architect to support cloud modernization initiatives for the United States Coast Guard (USCG) at Command, Control, Communication, Computer, Cyber, and Intelligence Service Center (C5

ISC) 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 Sr Appian Platform Engineer / Architect, you will lead the design, development, integration, and modernization of enterprise workflow and business process automation solutions. The ideal candidate will possess deep expertise in the Appian low‑code platform along with hands‑on experience in other low‑code/no‑code technologies such as Service Now, Microsoft Power Platform, Pega, Salesforce, Mendix, Out Systems, or similar enterprise automation platforms.

This role requires strong technical leadership, solution architecture skills, and the ability to drive digital transformation initiatives across complex enterprise environments.

• Lead architecture, design, and implementation of scalable Appian‑based enterprise applications.
• Define platform standards, governance, reusable components, and development best practices.
• Design and implement workflow automation, case management, integrations, and business process orchestration solutions.
• Collaborate with business stakeholders, product owners, and technical teams to translate business requirements into scalable technical solutions.
• Architect integrations with enterprise systems using REST/SOAP APIs, messaging platforms, databases, and cloud services.
• Provide technical leadership and mentorship to development teams.
• Establish CI/CD pipelines, Dev Sec Ops  practices, and automated deployment strategies for low‑code platforms.
• Evaluate and recommend appropriate low‑code/no‑code technologies for business use cases.
• Lead platform modernization and migration initiatives across multiple low‑code ecosystems.
• Ensure solutions comply with security, performance, scalability, and enterprise architecture standards.
• Support production operations, troubleshooting, performance tuning, and platform optimization.
• Create architecture documentation, technical roadmaps, and governance frameworks.

Basic Qualifications:

• Requires BS and 12+ years of prior relevant experience or Masters with 10+ years of prior relevant experience, additional years of experience will be accepted in lieu of a degree.
• 5+ years of hands‑on Appian development and architecture experience.
• Experience leading enterprise‑scale Appian implementations.
• Experience with at least one additional low‑code/no‑code platform:
  • Microsoft Power Platform
  • Service Now
  • Pega
  • Salesforce Platform
  • Ui Path
• Experience integrating low‑code platforms with enterprise systems and cloud services.

Preferred Qualifications:

• Appian Certified System Administrator certification.
• Appian Certified Lead Developer
• Appian Certified Senior Developer
• Appian Certified Architect (preferred)
• Microsoft Power Platform certifications
• Service Now Certified System Administrator / Architect

• Ability to define enterprise low‑code strategy and governance.
• Experience establishing platform CoEs (Center of Excellence).
• Strong understanding of scalable…