Sr. Solutions Architect

Lumen Solutions Group Inc. is a technology consulting services company based in Florida. We provide experienced business and IT professionals supporting clients from solution design to implementation and support, specializing in IT consulting, staffing, business/IT strategy, process blueprints, enterprise architecture, and transformation.

About the role

We are seeking a Senior Solutions Architect with 10+ years of progressive IT/technology experience, including hands-on engineering delivery in application development, systems integration, or data platform work before transitioning into architecture. Candidates with only advisory roles will not be competitive.

Responsibilities

• Own complex, multi-system solutioning for rail, transit, airlines, or transportation operations, with exposure to scheduling, dispatch, crew management, asset maintenance, and train control as a connected operational ecosystem.
• Perform structured business process analysis, including process mapping, As-Is/To-Be modeling, gap analysis, and workflow decomposition, ensuring equal fluency in operational process and technical design.
• Design integration architecture using event-driven patterns, REST/GraphQL APIs, pub/sub and streaming (Kafka or equivalent), and data exchange across OT/IT boundaries.
• Develop solutions for 24/7 operational availability on cloud and hybrid platforms (AWS, Azure, or GCP), addressing reliability, latency, and fault-tolerance requirements of safety-adjacent rail environments.
• Lead technical solutioning for operational data pipelines, including real-time streaming ingestion, event processing, and lakehouse patterns for train performance, delay causality, and asset health data.
• Produce rigorous, execution-grade architecture artifacts such as solution design documents, integration maps, API contracts, non-functional requirement matrices, and Architecture Decision Records for engineering teams.
• Engage directly with operational stakeholders—dispatchers, controllers, planners, and front-line supervisors—to align architecture decisions with actual workflow context.
• Support AI/ML-enabled operations, including predictive maintenance, anomaly detection, scheduling optimization, or computer vision inspection pipelines, with experience in lakehouse architecture (Databricks, Delta Lake, Unity Catalog) as a differentiator.
• Deliver independently in a contractor or consulting engagement model, managing scope, communicating proactively on blockers, and maintaining artifact quality without close supervision, including RFP/RFQ technical inputs, vendor evaluations, and architecture governance.

Requirements

• 10+ years of progressive IT/technology experience with a foundation in hands-on engineering delivery.
• 5+ years as a Solutions or Enterprise Architect with demonstrated ownership of complex, multi-system solutioning in rail, transit, airlines, or transportation operations.
• Proven ability to perform structured business process analysis and workflow decomposition.
• Deep command of integration architecture, including event-driven patterns, REST/GraphQL APIs, pub/sub, streaming (Kafka or equivalent), and OT/IT data exchange.
• Experience designing for 24/7 operational availability on cloud and hybrid platforms (AWS, Azure, or GCP).
• Ability to lead technical solutioning for operational data pipelines and produce execution-grade architecture artifacts.
• Direct engagement experience with operational stakeholders to ground architecture decisions in real workflows.
• Familiarity with AI/ML-enabled operations and lakehouse architecture (Databricks, Delta Lake, Unity Catalog) is a strong plus.
• Prior contractor or consulting experience, with the ability to deliver independently and manage scope effectively.

Location: Washington, DC (Remote). Contract role.