SSE
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MSP Signal ranks SSE #735 of 39,816 IT service providers nationally. SSE is a Managed security provider in St. Louis, MO, founded 1966, with 250+ staff. It offers Co Managed It, Compliance, Cybersecurity.
Source: MSP Signal, SSE company profile, Sep 21, 2026, https://mspsignal.com/msp/systems-service-enterprises-inc
Score and rank
- National
- #735 of 39,816
- State
- #11 of 494
- City
- #5 of 97
| Reputation | 71 | 0.30 | |
|---|---|---|---|
| Presence | 79 | 0.25 | |
| Credibility | 76 | 0.20 | |
| Scale | 100 | 0.15 | |
| Momentum | 0 | 0.10 |
No changes detected in the last 180 days.
Confidence 0.83 What this means · How the score works
Local rivals
Local rival data is not yet available for this company.
Services and offer
- Industries served
- Construction, Government, Manufacturing
- Works with
- Microsoft365
- Certifications
- CmmcNistNist 800 171
- Pricing
- No pricing published on their site, checked 2026-08-14 source
Reputation
No Google listing matched to this company yet.
Customers consistently praise the company's professional team, strong work culture, and dedicated customer service.
Recent changes
Change detection: same-source field changes since Sept 17, 2026; site re-crawl every 7 days since Sept 16, monthly before that.
- Aug 17, 2026recorded
In the news
title changed: 'SSE | Outsourced Managed IT Cybersecurity Services Cybersecu' -> 'SSE | Outsourced Managed IT Cybersecur, August 2026.
Location
9666 Olive Blvd, St. Louis, MO, 63132
Firmographics
- Staff
- 250+ source
- Founded
- 1966
- Revenue range
- $100M - $250M
- Domain
- Online since 1995
- NAICS codes
- 541512, 541513
About
SSE Inc. (Systems Service Enterprises, Inc.) is a Women-Owned Small Business based in St. Louis, Missouri, founded in 1966 by Susan S. Elliott. The company is recognized as the Midwest’s leading provider of outsourced managed IT and cybersecurity services, focusing on Information Technology, Cybersecurity Compliance, and Training for small-to-medium-sized businesses and Department of Defense contractors. With around 150 employees, SSE serves clients across all 50 U.S. states. The company holds several certifications, including ISO 9001:2015 and CMMC Level 2, which highlight its commitment to quality and compliance. SSE offers a range of services, including managed IT and cybersecurity solutions, compliance services for CMMC and NIST 800-171, and technical training. Its expertise is particularly valuable for clients in highly regulated industries and government markets.
Across Missouri's 263 managed service providers, only eight combine CMMC and NIST expertise with construction, government, and manufacturing focus. SSE delivers that rare intersection from St. Louis, pairing Cybersecurity Maturity Model Certification alongside NIST and NIST 800-171 frameworks for clients navigating federal compliance demands. The firm's co-managed IT, cybersecurity, and Microsoft 365 services address infrastructure needs where regulatory rigor meets operational complexity—a positioning that places them among the top 1.2% nationally.
Summary by MSP Signal, from public sources
Web presence
Open technical record
- Web maturity
- 70
- Page quality
- Performance 54, Seo 92, Accessibility 80
- Email security
- DKIM not checked
- Technology
- AIOSEO, AT&T DNS, Akamai CDN Solutions, All In One SEO, Appriver, Autodesk 3ds Max, Automox, Autotask PSA, Azure Active Directory B2C, Barracuda Email Security Service, Barracuda MSP, Barracuda Networks, Batch, Bootstrap, BrightGauge, CAPTCHA, Cisco Meraki, Citrix Hypervisor, Constant Contact, CrowdStrike, Datto, Duo Security, Facebook Login, Facebook Pixel, Facebook SDK, Fastly CDN, Font Awesome, Google Font API, Google Search Console, Google Tag Manager, Gravity Forms, HSTS, IT Glue, Infoblox DHCP, Kaseya VSA, Linkedin Marketing Solutions, Malwarebytes For Teams, MariaDB, Microsoft 365, Microsoft Active Directory, Microsoft Advanced Group Policy Management, Microsoft Azure, Microsoft Office, Microsoft PowerShell, Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Mobile Friendly, MySQL, Nexthink, Nginx, Open Graph, PHP, PWA, Pantheon, PrimeNG, Priority Hints, RSS, Remote Desktop Services, SalesIntel, Salesforce, SentinelOne, SharpSpring, Site Kit, Unitrends, VMware, Varnish, Viewport Meta, WordPress.Org, Wordpress, XML, JQuery, JQuery Migrate, ReCAPTCHA
- Detected
- 74 technologies detected
- Platform
- Wordpress
- CDN
- Fastly
- Blog
- Dormant
- Subdomains
- 27
Search presence
- Organic visits
- ~1200/mo est.
- Organic keywords
- 1,386
- Domain authority
- 25
- Backlinks
- 4,417
- Referring domains
- 501
People
People data not yet observed for this company.
People data from public professional profiles. We show leadership by name and everyone else as counts. Request removal.
Hiring
Recognition
No directory listings or awards observed.
Frequently asked questions
- Where is SSE located?
- SSE is located in 9666 Olive Blvd, St. Louis, MO, 63132.
- How many people work at SSE?
- SSE has an observed staff range of 250+.
- What services does SSE offer?
- SSE offers Co Managed It, Compliance, Cybersecurity, Microsoft 365.
- How does SSE rank among IT service providers in St. Louis?
- SSE ranks #5 of 97 observed IT service providers in St. Louis.
- Is SSE claimed?
- SSE is not claimed on MSP Signal.
Sources and corrections
Observed Sep 21, 2026.
Source: MSP Signal, SSE company profile, Sep 21, 2026, https://mspsignal.com/msp/systems-service-enterprises-inc
MSP Signal never publishes email addresses.