Business Details
Emergency
services
Your Trusted Partner for Comprehensive Security Solutions
Custom Security Systems has been a trusted provider of comprehensive security solutions in the Chicago area for over four decades. Founded in the early 1970s by Matthew P. McNulty and now led by his son Sean C. McNulty, our family-owned business combines generational expertise with cutting-edge technology to serve commercial, industrial, and residential clients. We specialize in access control systems, video surveillance, structured cabling, and security consulting, partnering with industry leaders like Electronic Entry Systems and Zivra to deliver tailored solutions.Our team of highly skilled professionals is committed to reducing risk, ensuring regulatory compliance, and safeguarding critical assets while maintaining a steadfast focus on customer satisfaction. With 1000+ satisfied clients ranging from small businesses to Fortune 500 companies, we pride ourselves on our ability to integrate advanced security technologies that lower costs and enhance operational efficiency. Our 24/7 service model ensures continuous support for every client, reflecting our core philosophy that safety and security should never be compromised.
Services
Access Control Systems
Video Surveillance
Structured Cabling
Security Consulting
Biometric Access
Intercom Systems
Wireless Surveillance
ID Card Systems
Network Security
Security Analytics
Highlights and features
- 40+ years of security systems expertise in Chicago and suburbs
- Partnerships with industry-leading technology providers
- Custom-tailored security solutions for unique client needs
- 24/7 emergency response and support services
- Family-owned commitment to quality and customer satisfaction
What people say
Professional and knowledgeable
Quick job completion
Caught serial burglar
No disruption
Highly recommend
Services
Access Control Systems
We design and implement enterprise-grade access control systems using leading brands like HID and Securitron. Our solutions include biometric authentication, proximity card systems, and network-controlled security to protect commercial properties. With 40+ years of experience, we ensure secure, scalable solutions that adapt to evolving business needs while maintaining strict compliance standards.
Video Surveillance
Our customized video surveillance solutions protect commercial enterprises and residential properties with advanced camera systems from Honeywell and Pelco. We offer digital video management, wireless surveillance, and analytics to deter crime and enhance security. With expertise in urban traffic management and small business applications, we deliver systems that combine cutting-edge technology with proven reliability.
Security Consulting
Our consultants provide tailored security recommendations based on 40+ years of industry experience. We analyze blueprints, assess risks, and develop compliance strategies for new construction and system upgrades. With expertise in force protection and regulatory compliance, we help clients implement cost-effective security measures that align with their operational goals and budgetary constraints.
Structured Cabling
We deliver end-to-end structured cabling solutions for data centers and enterprise IT infrastructure. Our services include network switch installation, cable management systems, and cybersecurity strategy development through our IT partner Zivra. With a focus on reliability and scalability, we ensure seamless integration of security systems with existing IT frameworks to support long-term business growth.
Biometric Access
Our biometric access control systems use fingerprint and facial recognition technology to secure high-risk areas. These advanced systems integrate with enterprise security networks while maintaining ease of use for authorized personnel. With 40+ years of implementation experience, we provide solutions that balance cutting-edge technology with proven reliability for commercial and institutional clients.
People
Sean C. McNulty
President
Continuing his family's 40+ year legacy in security systems, Sean C. McNulty leads Custom Security Systems with expertise in enterprise security integration. He oversees all operations and strategic partnerships while maintaining hands-on involvement in major client projects.
Questions
What security services do you offer?
We provide access control systems, video surveillance, structured cabling, and security consulting services tailored to commercial, industrial, and residential clients.
Do you serve areas outside Chicago?
While based in Chicago, we serve clients throughout the suburbs and have high-profile projects across multiple states.
Are emergency security services available?
Yes, we offer 24/7 emergency response and support services for all our security system clients.
How experienced is your team?
Our team has 40+ years of combined experience implementing security solutions, with expertise in both legacy systems and emerging technologies.
Can I get a free security consultation?
Yes, we offer complimentary security consultations to help clients identify their specific security needs and develop tailored solutions.
