Senior Appian Developer

Why Sabel Systems Sabel Systems designs and delivers digital engineering ecosystems for DoD programs, enabling teams to connect data, systems, and personnel within secure, scalable environments. Our solutions empower programs to make faster decisions, close sustainment gaps, and meet the digital acquisition requirements.

Rather than simply proposing transformation, we implement and operate it  method is clear: we orchestrate existing tools into a governing system of record, ensuring government ownership of infrastructure and traceable decisions. There’s no vendor lock, no proprietary baselines, and no need for ATO rebuilds during transitions.

Sabel Systems is redefining modern defense acquisition. If you seek to solve complex challenges at scale and want your work to directly accelerate military capability while reshaping the DoD’s approach to digital engineering, this is the place for you.

Complexity Simplified. Mission Amplified.

What You’ll DoDesign and architect enterprise-grade Appian solutions including process models, rules, CDTs (Custom Data Types), portals, and interfaces that address complex business process automation requirements

Gather, analyze, and document functional and technical requirements from DoD stakeholders; translate business needs into detailed technical specifications and solution designs

Develop and implement API integrations (REST, SOAP, JDBC) to connect Appian applications with legacy systems, cloud platforms, and third-party services in enterprise environments

Design and execute ETL (Extract, Transform, Load) processes and data migrations from legacy systems to new Appian-based environments; ensure data integrity and compliance throughout migrations

Develop and optimize SQL queries and relational database designs; work with Oracle, SQL Server, and other database technologies to support Appian data models and integration

Implement secure authentication and authorization mechanisms; ensure compliance with security standards, FISMA requirements, and federal accessibility guidelines (Section 508)
Support cybersecurity requirements and Authority to Operate (ATO) activities, including implementing required security controls, preparing system security documentation, and coordinating with ISSOs/ISSMs to help achieve and maintain system accreditation

Conduct code reviews, peer programming sessions, and technical documentation; establish and maintain coding standards and implementation best practices across projects

Participate in Agile/Scrum ceremonies including sprint planning, daily stand-ups, and retrospectives; manage tasks and deliverables using Jira and collaborate effectively with cross-functional teams

Troubleshoot and resolve complex technical issues; perform root cause analysis and implement preventive solutions to ensure system stability and performance

Provide technical demonstrations and presentations to clients; interface with stakeholders to gather feedback and communicate technical solutions to both technical and non-technical audiences

Mentor and develop junior developers and consultants; share knowledge of Appian best practices and support team member growth through guidance and technical mentorship

Leverage AI/ML capabilities within Appian to implement intelligent automation features including document processing, chatbots, and predictive workflows

What You Bring

RequiredU.S. Citizenship or eligible to obtain and maintain a security clearance6+ years of hands-on software development experience with at least 3+ years of direct, professional Appian platform development

Bachelor's degree in Computer Science, Information Systems, Engineering, Mathematics, or related field

Strong SQL expertise with hands-on experience designing and optimizing database schemas;…