Data Defenders® is a Managed Cybersecurity Operations Provider headquartered in Chicago, Illinois, serving municipalities, healthcare organizations, nonprofits, SLTT entities, and businesses across the United States since 2005.
We build and operate comprehensive cybersecurity operations for organizations that have real risk, real compliance requirements, and real exposure but lack the internal capacity to sustain a full security operation on their own. Our engagements are not product deployments. They are operational partnerships — built around each client's governance structure, technology environment, and maturity level, and designed to run continuously and improve over time.
Our portfolio progresses from foundational IT management through shared security operations to full lifecycle cybersecurity engagements. Every tier is powered by DataShield Analytics™, our AI-driven security operations platform, and supported by DataShield Pulse, our Agentic AI SOC capability that scales coverage without proportional staffing increases.
We have delivered multi-year managed security engagements covering both IT and Operational Technology environments, including municipal water treatment facilities, traffic management networks, healthcare compliance programs, and CJIS-covered law enforcement systems. Our clients stay. Our engagements deepen. And the outcomes we deliver are documented, verified, and built to withstand scrutiny.
If your organization has outgrown what point solutions and hourly consultants can provide, and you are ready for an operational partner who will carry the daily weight of your cybersecurity program alongside you, that is exactly what we built Data Defenders to do.
"They operate as though the client's security posture is their own responsibility."
Apr 29, 2026
Director, Municipal Government
Leela Karumuri
Government
Aurora, Illinois
501-1,000 Employees
Online Review
Data Defenders provided managed security services for a municipal government. Their work spanned IT and OT environments, managed detection, GRC, and vCISO services.
Data Defenders completed all tasks within their scope. Their team was helpful and resourceful. They were committed to their work. They delivered items on time. They communicated through in-person and virtual meetings and email.
The client submitted this review online.
BACKGROUND
Please describe your company and position.
I am the Director, Cyber & Technology Risk of Aurora
Describe what your company does in a single sentence.
Muncipal Government
OPPORTUNITY / CHALLENGE
What specific goals or objectives did you hire Data Defenders to accomplish?
MSSP
SOLUTION
How did you find Data Defenders?
RFQ
Why did you select Data Defenders over others?
Pricing fit our budget
Great culture fit
Good value for cost
Company values aligned
How many teammates from Data Defenders were assigned to this project?
6-10 Employees
Describe the scope of work in detail. Please include a summary of key deliverables.
Working with Data Defenders on the Aurora engagement has been a strong partnership from both technical and governance perspectives. The scope is comprehensive—spanning IT and OT environments, managed detection, GRC, and vCISO services—and the team delivers with consistency. What sets Cyrus Walker and his team apart is the practitioner-level accountability they bring. They operate as though the client’s security posture is their own responsibility, not just a service deliverable. For organizations in regulated environments or those managing complex infrastructure, Data Defenders is a credible and capable partner.
RESULTS & FEEDBACK
What were the measurable outcomes from the project that demonstrate progress or success?
All well accomplished
Describe their project management. Did they deliver items on time? How did they respond to your needs?
Always helpful and resourceful
What was your primary form of communication with Data Defenders?
In-Person Meeting
Virtual Meeting
Email or Messaging App
What did you find most impressive or unique about this company?
committed services
Are there any areas for improvement or something Data Defenders could have done differently?
well managed company
RATINGS
4.5
Quality
4.0
Service & Deliverables
Schedule
4.0
On time / deadlines
Cost
4.0
Value / within estimates
Willing to Refer
5.0
NPS
Showing 1-1 of
1 Reviews
Our Story
Data Defenders was built on a simple belief: organizations doing meaningful work shouldn't have to choose between strong cybersecurity and staying focused on their mission. We partner with nonprofits, municipalities, and growing businesses to deliver resilient cybersecurity operations, not just tools or alerts, but an embedded partner managing the full lifecycle. As a Managed Cybersecurity Operations Provider (MCOP), we align governance, technology, and process so your operations keep running.
Meet the Team
Cyrus WalkerFounder, CEO
Founder & CEO of Data Defenders. 30 years in cybersecurity ops. Trained 5,000+ federal law enforcement professionals under DHS funding. Leads every client engagement personally. Practitioner in OT security, forensics, and election system integrity.
What Sets Us Apart
Operations-First, Not Product-First
We lead with operations, not tools. Every engagement runs across three pillars: Governance, Technical Infrastructure Management, and Process and Procedure. We carry the daily operational weight of your cybersecurity program alongside you.
Proven in High-Stakes Environments
We have secured water treatment facilities, traffic networks, CJIS law enforcement systems, election infrastructure, and healthcare programs. Our clients are public-facing organizations where a breach has real consequences for real people.
Enterprise Security. Accessible Price.
Through the Regional SOC Utility, municipalities, nonprofits, and healthcare organizations get the breadth of a full security operation without the internal staffing, expertise, or overhead required to run one independently.
Locations (1)
111 West Jackson BoulevardChicago, IL,
United States60604
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