Kimley-Horn operates across transportation, civil, and environmental engineering with a sprawl of infrastructure work: highway design, community planning, landscape architecture, and environmental consulting. Nearly 10,000 employees across 150+ U.S. offices execute projects ranging from local developments to national initiatives, serving both public and private sector clients. The firm was founded in 1967 by transportation engineers Bob Kimley and Bill Horn as a highway design partnership and has since expanded into multidisciplinary consulting.
The business model runs on client stickiness - over 90% of work comes from repeat clients. This constraint shapes operations: laser-focused service delivery, structured execution across established disciplines, and the infrastructure to manage concurrent projects at scale. For security teams, this means defending a distributed operation with 150+ office locations, managing access to design and engineering systems that feed client deliverables, and protecting intellectual property embedded in planning frameworks and technical documentation that clients depend on.
The firm emphasizes structured mentoring and clear career paths alongside collaboration and individual ownership of meaningful work. This people-forward framing typically correlates with internal systems that require active management - identity and access controls across a dispersed workforce, compliance frameworks tied to public sector contracts, and security practices that scale with headcount and geographic footprint.