Sr. Systems Integration Engineer / TS/SCI

About the role

GC2IT is seeking a Senior Systems Integration Engineer to design, modernize, and sustain integrations for a mission-critical, globally deployed identity and mobility platform. This hands-on role focuses on complex system-to-system integrations across Java microservices, event-driven architectures, edge environments, and cloud platforms.

The position requires occasional physical activity including climbing, bending, stretching, walking, sitting, using hands to handle or feel, frequent typing, talking and hearing; occasional standing, kneeling, stooping, crouching, bending, twisting or reaching; may require lifting or moving up to 10 lbs. Vision requirements include close, distance, color, peripheral vision, depth perception and ability to adjust focus. Work environment will have moderate noise when working in an office setting.

Responsibilities

• Design, build, and maintain secure, reliable integrations between a distributed platform and third-party systems using REST APIs, asynchronous messaging, secure file/data exchange, and device/peripheral interfaces.
• Modernize legacy integrations into Java-based microservices operating within a distributed platform architecture.
• Build integrations across edge, data center, and AWS cloud deployment models.
• Engineer integrations for resilience, observability, auditability, latency, and intermittent or low-bandwidth network conditions.
• Integrate with government and commercial systems such as identity and verification services, traveler data platforms, biometric and document-capture peripherals, and access-control/gate systems.
• Define interface contracts, schemas, versioning strategies, retry/idempotency behavior, and certification/test approaches.
• Troubleshoot issues across application, data, messaging, and network layers.
• Partner with software, cloud, network, QA, field engineering, analytics/observability, and security teams.

Qualifications

Required:

• Eight or more years of experience in software engineering or systems integration.
• Strong hands-on experience building Java-based distributed services.
• Proven production experience with API integration and event-driven messaging.
• Experience with one or more of the following: RabbitMQ, Kafka, JMS, AMQP, MongoDB, Elasticsearch/OpenSearch, or AWS production deployment/operations.
• Experience designing and supporting integrations in high-availability, mission-critical, or regulated environments.
• Strong understanding of authentication/authorization, certificate-based security, schema evolution, error handling/retries, observability, and supportability.
• Experience modernizing legacy or monolithic integrations into service-oriented or microservices-based architectures.
• Ability to work effectively in a highly collaborative engineering environment with direct ownership of delivery outcomes.

Preferred:

• Experience with HashiCorp tooling, especially Consul, Nomad, and Vault, or adjacent platforms.
• Experience with AWS-native services and infrastructure automation.
• Familiarity with ELK, Grafana, Kibana, Logstash, or other observability stacks.
• Experience integrating biometric devices, document readers, cameras, license plate readers, or other field peripherals.
• Experience with degraded, disconnected, or low-bandwidth environments.