Business Details
Emergency
services
Your Trusted Partner for Security Systems in Chicago
Founded in the early 1970s, Custom Security Systems has been a trusted provider of comprehensive security solutions for over four decades. Our family-owned business, now led by Sean C. McNulty, specializes in designing, installing, and maintaining advanced security systems tailored to meet the unique needs of commercial, industrial, and residential clients. Partnering with industry leaders like Electronic Entry Systems (EES), Honeywell, and Pelco, we deliver cutting-edge access control, video surveillance, and structured cabling solutions that reduce risk, ensure compliance, and protect critical assets.With over 1,000 satisfied clients, including Fortune 500 companies, our team combines technical expertise with personalized service to provide scalable, cost-effective security strategies. We prioritize client collaboration, offering complimentary consultations to align solutions with specific goals, budgets, and timelines while maintaining a commitment to operational excellence and customer satisfaction.
Services
Access Control Systems
Video Surveillance
Structured Cabling
Security Consulting
Biometric Access
Proximity Card Keys
Photo ID Systems
Wireless Surveillance Cameras
Digital Video Management
Security Analytics
Highlights and features
- 40+ years of experience serving Chicago businesses with proven security expertise.
- Family-owned with a commitment to personalized, client-focused service.
- Partnered with industry leaders for cutting-edge, reliable security technology.
- 1,000+ satisfied clients, including Fortune 500 companies and high-profile projects.
- Customized solutions designed to meet specific security goals and budgets.
What people say
Professional and knowledgeable
Finished the job quickly
Highly recommend
Clear snap of plate number
1000+ satisfied customers
Services
Access Control Systems
Our access control systems integrate with industry-leading providers like HID and Securitron to secure facilities through keyless entry, biometric authentication, and proximity card systems. Designed for businesses of all sizes, these solutions ensure only authorized personnel access sensitive areas while providing scalable management for evolving security needs.
Video Surveillance
We offer comprehensive video surveillance systems featuring digital video management, wireless cameras, and advanced analytics. Tailored for commercial and residential properties, our solutions deter theft, monitor activity, and provide evidentiary support when needed, using trusted brands like Honeywell and Pelco for reliable performance.
Security Consulting
Our consultants analyze blueprints and operational requirements to develop customized security strategies. Focused on compliance, risk reduction, and asset protection, we provide actionable recommendations aligned with client budgets and timelines, ensuring long-term safety and regulatory adherence.
Structured Cabling
We design and install structured cabling systems for data centers and IT infrastructure, using high-performance components to ensure seamless connectivity. Partnering with Zivra for cybersecurity expertise, our solutions support scalable, future-ready networks that enhance operational efficiency and digital security.
Biometric Access
Biometric access systems use fingerprint or facial recognition technology to grant secure entry to facilities. Ideal for high-security environments, these systems eliminate traditional keys or cards, offering precise control and audit trails to track access events in real time.
People
Sean C. McNulty
Owner
Sean C. McNulty leads Custom Security Systems, continuing his family's legacy since taking over in 1992. With decades of hands-on experience, he oversees project execution and client relations, ensuring solutions meet rigorous security standards while maintaining personalized service for every client.
George Popp
Security Manager
As Security Manager at Westin Chicago North Shore Hotel, George Popp collaborated with Custom Security Systems to implement efficient security upgrades. He praised the team's professionalism and ability to complete projects swiftly with minimal disruption to hotel operations.
Questions
What security services do you offer?
We provide access control, video surveillance, structured cabling, and security consulting tailored to commercial, industrial, and residential needs.
How long have you served Chicago businesses?
We've protected Chicago and its suburbs for over 40 years, established in the early 1970s.
Do you offer 24/7 emergency services?
Yes, we provide 24/7 support for all clients, ensuring immediate response to security concerns.
What areas do you serve?
Primarily Chicago and surrounding suburbs, with clients across Illinois and out-of-state locations.
