Insights

Government Contracting Expertise SSE specializes in Department of Defense contracting and cybersecurity compliance, positioning it well to serve clients in highly regulated and security-sensitive industries. This expertise opens opportunities to provide tailored IT and cybersecurity solutions to government agencies and defense contractors seeking certified and compliant partners.

Compliance and Certification Leadership Having recently achieved a perfect score of 110 for CMMC Level 2 Certification and maintaining ISO 9001:2015 standards, SSE demonstrates a strong commitment to quality and regulatory standards. Companies seeking to enhance their compliance posture or achieve similar certifications could benefit from SSE's consulting and training services.

Technological Capabilities SSE's use of advanced technology stacks such as VMware, Cisco Meraki, Automox, and Windows Server indicates its capability to deliver modern, scalable, and secure IT infrastructure solutions. This presents an opportunity to upsell clients needing integrated cybersecurity, cloud, and network management solutions.

Financial Stability and Growth With revenue ranging between $500 million to one billion dollars and a strong focus on high-compliance sectors, SSE is positioned as a financially stable partner. This stability encourages prospects looking for reliable vendors capable of supporting long-term IT and cybersecurity projects in regulated industries.

SSE Tech Stack

SSE uses 8 technology products and services including CATIA, Automox, Dell, and more. Explore SSE's tech stack below.

  • CATIA
    Cad & Graphics
  • Automox
    Endpoint Protection
  • Dell
    IT Infrastructure
  • jQuery Migrate
    Javascript Libraries
  • Cisco Meraki
    Network Hardware
  • Windows Server 2012
    Operating Systems
  • C++
    Programming Languages
  • VMware
    Virtualisation Software

Media & News

SSE's Email Address Formats

SSE uses at least 1 format(s):
SSE Email FormatsExamplePercentage
First.Last@sseinc.comJohn.Doe@sseinc.com
94%
FirstLast@sseinc.comJohnDoe@sseinc.com
4%
Last@sseinc.comDoe@sseinc.com
2%

Frequently Asked Questions

Where is SSE's headquarters located?

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SSE's main headquarters is located at 9666 Olive Boulevard Suite 710 St. Louis, Missouri 63132 United States. The company has employees across 5 continents, including North AmericaEuropeAsia.

What is SSE's phone number?

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You can contact SSE's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is SSE's stock symbol?

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SSE is a publicly traded company; the company's stock symbol is ESNT.

What is SSE's official website and social media links?

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SSE's official website is sseinc.com and has social profiles on LinkedIn.

How much revenue does SSE generate?

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As of March 2026, SSE's annual revenue is estimated to be $16M.

What is SSE's NAICS code?

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SSE's NAICS code is 5415 - Computer Systems Design and Related Services.

How many employees does SSE have currently?

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As of March 2026, SSE has approximately 805 employees across 5 continents, including North AmericaEuropeAsia. Key team members include CEO: D. A.Chief Executive Officer: D. G.CEO: S. P.. Explore SSE's employee directory with LeadIQ.

What industry does SSE belong to?

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SSE operates in the IT Services and IT Consulting industry.

What technology does SSE use?

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SSE's tech stack includes CATIAAutomoxDelljQuery MigrateCisco MerakiWindows Server 2012C++VMware.

What is SSE's email format?

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SSE's email format typically follows the pattern of First.Last@sseinc.com. Find more SSE email formats with LeadIQ.

When was SSE founded?

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SSE was founded in 1966.

SSE

IT Services and IT ConsultingMissouri, United States501-1000 Employees

Systems Service Enterprises, Inc. (SSE) is a leader in Information Technology, Cybersecurity Compliance, and Training and Technical Data solutions for small-medium sized businesses and specializing in Department of Defense (DoD) contracting.  A Women-Owned Small Business (WOSB) with 150 employees, SSE was founded in 1966 by Susan S. Elliott.  SSE is headquartered in St. Louis, MO and is able to serve clients throughout all 50 states.  

As an ISO 9001:2015 certified organization, SSE has not only the technical expertise, but the disciplined processes and business maturity to deliver customized best-in-class IT and cybersecurity solutions across several highly regulated industries.  As a DoD contractor itself, SSE has maintained our and our customers’ networks to evolving regulatory standards and protects data for ourselves and our clients.

In November of 2024, SSE successfully completed a Joint Surveillance Assessment with a C3PAO and DIBCAC, achieving a perfect score of 110 for its CMMC Level 2 Certification.

Established processes, standards and quality solutions allow SSE to meet the most complex challenges for our clients…both now with respect to NIST 800-171, as well as looking ahead to plan for future needs including CMMC.

Section iconCompany Overview

Headquarters
9666 Olive Boulevard Suite 710 St. Louis, Missouri 63132 United States
Phone number
Website
sseinc.com
Stock Symbol
ESNT
NAICS Code
5415 - Computer Systems Design and Related Services
Founded
1966
Employees
501-1000

Section iconFunding & Financials

  • $500M$1B

    SSE's revenue is estimated to be in the range of $500M$1B

Section iconFunding & Financials

  • $500M$1B

    SSE's revenue is estimated to be in the range of $500M$1B

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