Systems engineering is the discipline of making sure complex things work — not just the parts, but the interactions between them, and not just at delivery, but across the whole life of the system. My practice centers on four activities that reinforce each other.
Requirements engineering
Most system failures trace back to requirements: vague, unverifiable, contradictory, or simply missing. I work from stakeholder needs down to verifiable requirements — written so that each one can actually be tested, traced, and changed without breaking the web around it. See the research note on requirements engineering for complex systems.
Systems architecture
Architecture is the set of decisions that are expensive to reverse. I focus on decomposing systems into modules with clean interfaces, making trade-offs explicit, and documenting the reasoning so future engineers inherit understanding, not just diagrams.
Verification & validation
Verification asks "did we build it right?" — validation asks "did we build the right thing?" Both run as a thread through the lifecycle, not as a phase at the end. Test planning starts from requirements, and every requirement should know how it will be verified before design begins. More in verification and validation across the systems lifecycle.
Lifecycle thinking
A system is conceived, developed, produced, operated, and retired — and decisions made early echo through every later phase. Lifecycle thinking means designing for operations, maintenance, and eventual retirement from the start, not discovering those needs during a 2 a.m. incident.