Network & Operational Technology Cybersecurity Deployment for a Major Water and Wastewater Utility
A major water and wastewater utility needed to improve Operational Technology (OT) cybersecurity visibility across a highly distributed network of active critical-infrastructure facilities. Greencastle led a multi-state deployment of passive vulnerability monitoring devices, industrial ethernet switches, and supporting infrastructure across facilities that previously lacked standardized enterprise-level OT monitoring. The team managed the full lifecycle, from business case development and deployment planning through procurement, vendor coordination, implementation, testing, and closeout. Through wave-based sequencing, disciplined project controls, and stakeholder-focused change management, Greencastle delivered the program on schedule, within scope, and under budget without disrupting continuous facility operations.
THE SOLUTION
Greencastle delivered a multi-state Operational Technology cybersecurity deployment through end-to-end program management, field implementation coordination, and project controls that improved enterprise monitoring and vulnerability awareness.
Benefits
- Enhanced Operational Technology Visibility
Established standardized OT monitoring across previously unstandardized facilities, improving vulnerability awareness, risk identification, and cybersecurity readiness. - Operational Continuity
Executed deployments at active water and wastewater facilities without disrupting continuous operations or critical public service delivery. - Scalable Deployment Model
Created a repeatable, wave-based implementation framework that can support future OT deployments, endpoint implementations, hardware refreshes, and site transition programs.
APPROACH
Strategic Deployment Planning
Greencastle directed the full project lifecycle, beginning with business case development, scope definition, budget planning, and deployment strategy. The team structured the rollout into five implementation waves, prioritizing major treatment facilities and critical infrastructure first to accelerate risk reduction. Remaining sites were then sequenced geographically to improve logistical efficiency while accounting for operational constraints, resource availability, and equipment lead times.
Field Readiness & Implementation Coordination
Greencastle coordinated readiness across regional leadership, on-site water treatment personnel, third-party installation crews, and local IT teams to prepare each site for deployment. This included confirming site access, escort requirements, installation windows, IT-room readiness, firmware updates, hardware logistics, and cutover support. By managing these workstreams in parallel across 201 active facilities, the team enabled efficient field execution while maintaining continuous utility operations.
Project Controls & Change Management
Greencastle implemented a disciplined project-controls framework using deployment dashboards, integrated schedules, RAID logs, implementation runbooks, executive reporting, and a centralized Teams workspace. These tools created a single source of truth across 13 states and enabled rapid issue identification, escalation, and resolution. The team also applied change management practices to build stakeholder awareness, secure buy-in, and reduce the operational burden on site personnel throughout deployment.
CONCLUSION
Greencastle helped a major water and wastewater utility establish standardized Operational Technology cybersecurity visibility across a complex, multi-state critical-infrastructure environment. By planning and executing a disciplined field deployment across 201 active facilities, the team successfully implemented 603 OT and network devices without disrupting continuous operations. The engagement strengthened vulnerability awareness, improved proactive risk management, integrated newly acquired facilities into an enterprise monitoring environment, and created a scalable deployment model for future OT modernization, endpoint deployment, hardware refresh, and site transition initiatives.
