TEKsystems · 8 hours ago
OT Engineer
Libertyville, IL
Full-time
Hybrid
Senior Level
$72.20/hr - $72.20/hr
5+ years expTEKsystems is a leading provider of business and technology services, seeking an Engineer III to serve as a delivery lead across a broad portfolio of operational technologies and facility systems. The role involves planning and executing upgrades, managing cross-functional collaborations, and ensuring compliance with IT and cybersecurity standards in a GxP-aware environment.
Information Technology
Responsibilities
Serve as the delivery lead for site operations technologies across U.S. mixed campuses, ensuring end‑to‑end outcomes (scoping, planning, delivery, validation, and operationalization) for assigned platforms and projects
Translate business and technical needs into actionable plans, structured documentation, and clear stakeholder communications; proactively manage dependencies, risks, and decision logs
Coordinate cross‑functional work with Infrastructure, Cybersecurity/InfoSec, Facilities, and external vendors; align execution to internal standards while meeting timelines and budgets
Independently plan and execute OS, database, and application upgrades for diverse OT and instrumentation platforms (e.g., Windows Server, Windows 11 migrations), including associated integrations and monitoring enablement
Build and manage testbeds/PoC environments to evaluate system compatibility with existing infrastructure; design and execute comprehensive test protocols prior to production changes
Maintain accurate infrastructure/architecture references; manage service and administrative accounts in accordance with security and audit expectations
Provide hands‑on support for installations and updates across facility technologies (e.g., building automation, process alarm systems, chart recorders, sensors)
Own the creation, maintenance, and closure of SLC artifacts and application support playbooks (requirements, design specifications, risk assessments, traceability, test plans/results, change controls, and runbooks)
Execute work within formal IT change frameworks; ensure timely, accurate documentation and JIRA updates so that all activities are inspection‑ and audit‑ready
Uphold IT, cybersecurity, and quality standards; articulate the 'how' and 'why' behind process rigor to minimize business disruption and downstream audit issues
Troubleshoot OT communication paths, protocol issues, and firewall rules in partnership with Network and Cybersecurity teams
Support network segmentation and VLAN migrations (e.g., moving campus facility devices off corporate networks into protected control networks), documenting related changes as part of lifecycle deliverables
Assist with cloud ↔ on‑prem transitions where applicable; ensure appropriate controls and monitoring remain intact throughout migrations
Engage external vendors and facilities partners to deploy, upgrade, and sustain systems in compliance with cybersecurity and quality baselines
Foster a culture of open knowledge‑sharing, leveraging the team’s diverse expertise to solve complex problems rapidly and safely
Qualification
Required
5–7+ years of experience executing IT System Lifecycle (SLC) activities and operating within formal change management frameworks in regulated or quality‑sensitive environments
Prior hands‑on support for OT, instrumentation, or facilities technologies (e.g., metrology, BAS, controls, alarms, sensor systems)
Demonstrated ability to work independently and as part of a cross‑functional delivery team; consistently delivers outcomes on time and within scope
Proven ability to scope and estimate work, anticipate complexities, and communicate status/risks/decisions with clarity
Ability to be on‑site in North Chicago regularly (local presence ~3 days/week, with flexibility for campus needs)
Preferred
Practical understanding of network segmentation/VLANs, OT protocols (e.g., BACnet), and firewall troubleshooting, with the ability to partner effectively with Infrastructure and Security teams
Familiarity with IT security expectations for OT environments and the rationale behind process rigor (reducing operational and audit risk)
Experience managing vendors and collaborating with Facilities, Infrastructure, and Security on complex, cross‑domain changes
Exposure to cloud ↔ on‑prem integration patterns relevant to OT data flows and monitoring
Benefits
Medical, dental & vision
Critical Illness, Accident, and Hospital
401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available
Life Insurance (Voluntary Life & AD&D for the employee and dependents)
Short and long-term disability
Health Spending Account (HSA)
Transportation benefits
Employee Assistance Program
Time Off/Leave (PTO, Vacation or Sick Leave)
Company
TEKsystems
At TEKsystems, they understand people. Every year they deploy over 80,000 IT professionals at 6,000 client sites across North America,
10001+ employees
H1B Sponsorship
TEKsystems has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (46)
2024 (52)
2023 (33)
2022 (22)
2021 (36)
2020 (53)
Funding
Current Stage
Late StageLeadership Team
Ryan Skains
Vice President, TEKsystems Global Services
Recent News
2025-11-19
2025-10-29
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