Head of Architecture

About Landmark

• Landmark, a Halliburton company, builds the software and data platforms that help the global energy industry make better decisions
• Our products span subsurface interpretation, well construction planning, reservoir simulation, and digital operations
• These are tools used daily by engineers and scientists at the world’s largest energy companies
• We are building toward a deliberately decentralized engineering organization, one where autonomous product teams move faster and make better local decisions, and where the ability to rapidly assemble and reconfigure capabilities becomes a genuine competitive advantage

• As Director of Architecture at Landmark, you will own the architectural coherence of a decentralized engineering organization. You will not own the engineers who build the products. You will own the standards, the community, and the alignment mechanisms that allow independently operating teams to build components that work together
• Landmark’s engineering organization is structured around autonomous product and platform teams, each with embedded principal engineers who carry architectural accountability within their scope. Your job is to connect those principal engineers into a network, align them on the shared patterns that make individual team decisions add up to a coherent system, and build the governance mechanisms that keep that coherence as the organization evolves
• The engineering design problem you are solving is composability. In an environment where capabilities need to be assembled and reassembled in response to market conditions, the contracts between components — including APIs, identity flows, event schemas, data models, and agentic interaction patterns — must be deliberately designed, consistently applied, and governed through a community that owns them. You will define those contracts and build the community that maintains them
• You will work with a small team of staff-level architects. Your organizational reach extends to every principal and staff engineer at Landmark through the architecture community you build and lead

• Define and maintain Landmark’s architectural standards across the integration surface between components: API design conventions (form, versioning, error semantics, pagination), event and message schema standards, data model conventions, and the deployment and packaging patterns that allow components to be independently developed and assembled
• Establish and operate an Architectural Decision Record (ADR) system that captures significant architectural decisions, the reasoning behind them, and the context that should inform future changes
• Own the design review process for cross-cutting architectural decisions: when a team’s technical choice affects the integration surface, there is a clear, lightweight process for surfacing and aligning on that choice before it becomes a constraint
• Define the architectural standards for agentic AI components as Landmark’s product portfolio incorporates agent-based workflows: agent-to-agent communication patterns, tool interface conventions, prompt and response contracts, and the security and observability patterns that must apply at every agentic boundary

• Build and lead Landmark’s architecture community: a guild of principal and staff engineers from across product and platform teams who collectively own Landmark’s shared architectural direction
• Run the recurring community forums, including design reviews, architecture office hours, and cross-team technical councils, that create the opportunity for alignment before teams diverge
• Establish the practice of cross-team architectural consultation: product teams bring significant design decisions to the community before committing, and they get useful feedback that improves their design rather than a bureaucratic checkpoint
• Build the reference documentation, pattern libraries, and worked examples that make it easy for teams to apply standards correctly without needing to consult you personally on every decision

• Maintain a coherent view of Landmark’s…