8+ years in enterprise/solution/security architecture for large, federated environments (federal experience preferred). Expert diagramming skills: Microsoft Visio (or Archi/Lucid chart/draw.io) with the ability to convey TOGAF level models clearly to both engineers and executives. Hands-on experience mapping designs to ZT pillars (Identity, Device, Network/Environment, Application/Workload, Data) and crosscutting areas (Visibility & Analytics, Automation & Orchestration, Governance). Experience with network & cloud architecture: segmentation/micro segmentation, modern connectivity patterns (e.g., TIC 3.0), policy enforcement at multiple layers, workload identity, service-to-service auth. RMF literacy and collaboration with ATO stakeholders; familiarity with FedRAMP Rev. 5 control sets for cloud. Experience with data & identity patterns: MFA, device posture, secrets management, key management, and lineage/classification considerations in ZT. Concise technical writing, facilitation across PMO, pillar leads, vendors, and engineers; ability to brief options and tradeoffs.