The Midwest's Premier Provider of Outsourced Managed IT and Cybersecurity Services

Partnering with companies coast to coast when system availability and data security are paramount.

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SSE Provides Information Technology, Cybersecurity, Compliance, and Contracting Solutions and Services to Clients Across the United States

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CMMC Compliance Services

Navigate the complexities of CMMC to reach and maintain compliance and pursue DoD projects with confidence.
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NIST 800-171 Compliance Services

Safeguard your sensitive data to enhance your cybersecurity posture and gain a competitive advantage.
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Managed Cybersecurity Compliance

Get and stay compliant. Outsource the management of your cybersecurity and confidently affirm your compliance.
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Managed IT Services

Stay focused on your business with reliable IT support and proactive services to ensure your systems are available and secure.
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Managed Cloud Services

Make the most out of your investment in M365 to work and collaborate as a team with ease.
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Co-Managed Services

Turn over key components of your technology and cybersecurity through custom tailored support solutions and rely on SSE to cost-effectively augment your internal teams.

SSE is CMMC Level 2 Certified and a CMMC Registered Provider Organization

NIST Special Publication (SP) 800-171 and Cybersecurity Maturity Model Certification (CMMC) are two mandates with which companies working within the Defense Industrial Base (DIB) must comply. They were designed to enhance and certify the cybersecurity posture of companies participating in government supply chains and protect their sensitive data.

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History of SSE

SSE: Rooted in History, Driven by Service

Susan S. Elliott founded Systems Service Enterprises Inc. in 1966 after retiring from IBM. Driven by her passion for technology and client service, Susan was determined to get in on the ground floor of the PC revolution. Our deep roots in technology and training are the backbone of our IT and cybersecurity solutions today; and our record of service to our clients is the basis of our industry recognition as one of the nation’s best IT and cybersecurity firms. SSE is ranked 56th out of the 501 MSPs worldwide.

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SSE In the News

DOJ Ramps Up Cyber-Enforcement on Defense Contractors

The Department of Justice’s recent $4.6 million settlement with defense contractor MORSECORP sends a clear message to the Defense Industrial…

SSE Ranked #68 on MSPMentor’s 501 Global List for Top Managed Service Providers in 2025

We’re thrilled to announce that we have been recognized as #68 on MSPMentor’s 501 Global List for Top Managed Service…

CMMC-Based Cybersecurity Compliance

For companies within the Defense Industrial Base (DIB), the stakes have never been higher—cybersecurity compliance is no longer optional. With…
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DoD Releases Proposed Rule to Officially Implement CMMC

Recently, the Department of Defense (DoD) took a significant step forward in bolstering cybersecurity across its contractor base by releasing…

Choosing the Right Managed IT Services Provider for Your Business

Choosing the right Managed Service Provider (MSP) is critical for any technology-reliant business, as it impacts your company’s efficiency and…

The Role of Cyber Insurance in Incident Response Planning

The more our lives and processes shift to digital solutions, the threat of cyberattacks also increases. Businesses increasingly rely on…
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  • "We didn't want to make the mistake of assuming we could pull this off last minute. By the time CMMC requirements start appearing in contracts, it'll be too late to react. You either have it, or you're out of the running."

    Eric Sammarco Senior Principal and Information Security Officer, Protection Engineering Consultants

  • "We're a small business. We don't have a dedicated IT department or the resources to manage this on top of our jobs. Working with an RPO meant we had experts walking alongside us, people who live and breathe this stuff. So, we weren't on an island trying to interpret federal security standards.“

    Eric Sammarco Senior Principal and Information Security Officer, Protection Engineering Consultants

  • "We're already seeing large primes ask their subs for updated compliance scores. We don't want to be the bottleneck in a proposal. If we're not certified, they move on, and we lose the work.“

    Krystal Johle Principal and Facility Security Officer, Protection Engineering Consultants

Discover How SSE Can Secure Your Business and Ensure the Operational Availability of Your IT Systems.

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