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www.sseinc.com

St. Louis, MO, United States

A nationwide IT, cybersecurity, and compliance solutions provider helping organizations navigate regulatory requirements and secure technology operations.

Systems Service Enterprises Inc. (SSE) is a U.S.-based information technology, cybersecurity, compliance, and contracting solutions provider delivering services to clients across industries. SSE helps organizations navigate evolving regulatory requirements, achieve and maintain cybersecurity compliance, manage IT operations, and implement cloud and security-focused solutions. With a history dating back to 1966, SSE emphasizes client service and training, and positions itself as a trusted partner for readiness assessments, gap analyses, remediation, and ongoing compliance support.

Mission statement

Helping businesses achieve and maintain cybersecurity compliance through evolving regulations.

Products & Services

CMMC Compliance Services Service

Achieve and maintain rigorous CMMC compliance with SSE's expert guidance.

www.sseinc.com/cybersecurity-compliance/cmmc-compliance-services
  • CMMC Level 2 Certification — Achieve Level 2 Certification
  • End‑to‑End Program Support — Receive Comprehensive Support
  • Remediation Services — Close Compliance Gaps
  • Gap Assessment Services — Identify Compliance Gaps
  • Continuous Compliance Support — Ensure Long-Term Compliance

NIST 800-171 Compliance Services Service

Enhance cybersecurity and achieve compliance with NIST 800-171 to secure DoD contracts.

www.sseinc.com/cybersecurity-compliance/nist-compliance
  • Competitive Advantage Through Compliance — Achieve Market Readiness
  • NIST 800-171 Compliance Guidance — Navigate Compliance Requirements
  • Gap Assessment Services — Identify Compliance Shortfalls
  • Continuous Compliance Support — Ensure Long-Term Compliance

Cybersecurity Compliance Service

Ensure continuous compliance and enhance your cybersecurity posture through tailored services.

www.sseinc.com/cybersecurity-compliance
  • Ongoing Compliance Assurance — Guarantees Continuous Compliance
  • Outsourced Cybersecurity Management — Reduces Internal Resource Load
  • Regulatory Alignment Support — Utilizes Sector Expertise
  • Gap Assessments — Pinpoints Vulnerabilities

CMMC C3PAO Assessment Service

Achieve CMMC compliance and secure DoD contracts with expert assessments.

www.sseinc.com/cmmc-c3pao-assessment
  • Certified C3PAO Assessment — Validate Compliance
  • Independent Evaluation — Ensure Objectivity

CMMC Gap Assessment Service

Identify and document compliance gaps to achieve CMMC certification.

www.sseinc.com/contact-us/gap-assessment
  • Deliverables Package — Receive Comprehensive Assessments
  • Four‑Week Gap Analysis — Complete Rapid Assessments
  • Remediation Recommendations — Implement Targeted Improvements
  • Identification of Gaps — Gain Clear Visibility into Compliance Status

CMMC Remediation Service

Ensure compliance with CMMC requirements through tailored remediation services.

www.sseinc.com/cmmc-remediation
  • Policy and Procedure Documentation — Standardize Documentation
  • SSP Finalization — Complete SSP
  • Technical Control Improvements — Implement Technical Controls

CMMC Readiness Assessment Service

Achieve CMMC compliance readiness with a structured evaluation and tailored roadmap.

www.sseinc.com/contact-us/cmmc-readiness-assessment
  • Compliance Report — Identifies Compliance Gaps
  • Fast Delivery Timeline — Quick Results
  • Readiness Roadmap with Budget Guidance — Customized Compliance Path

Managed IT Services Service

Expert IT services to enhance operational efficiency and security for small and mid-sized businesses.

www.sseinc.com/managed-it-services
  • Multi-Layered Security — Protects Against Cyber Threats
  • 24x7 Help Desk — Provides Continuous Support
  • Proactive IT Management — Minimizes Operational Disruption
  • ISO 9001–style Processes — Ensures Quality Service Delivery
  • Cloud M365 Services — Optimizes M365 Usage
  • Co-Managed Services — Enhances Internal IT Capabilities

Cloud Managed IT Services Service

Streamline IT operations and enhance security with expert cloud-managed services.

www.sseinc.com/managed-it-services/cloud
  • Security Hardening — Enhance Security Posture
  • Expert Configuration of M365 — Optimize Microsoft 365 Environment
  • Proactive IT Management — Maintain Operational Efficiency

Co‑Managed IT Services Service

Augment your internal IT team with tailored tech and expert support for optimized operations.

www.sseinc.com/managed-it-services/co-managed
  • Certified Professionals — Leverage Certified Experts
  • Collaboration with Internal IT Team — Collaborate Seamlessly

Market Segments

Billion USD 0 20 40 60 80 100 120 140 CMMC compliance Cybersecurity a… Managed cloud a… Managed IT and … Market Size (Billion USD)
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% CAGR Growth Potential

CMMC compliance

Assessment, remediation, and ongoing readiness services to achieve and maintain Cybersecurity Maturity Model Certification for defense contractors, including gap analysis, C3PAO assessment support, SPRS/NIST alignment, supply chain scoping, and vCISO guidance.

Market size: $3.5B CAGR: 80.5%
Primary basis: third-party CMMC services projection in the provided search results (growth from ~$56M pre-2024 to $3.5B by 2031). That trajectory implies very high CAGR (~80% between 2024–2031) for assessment/remediation/third-party readiness services. Secondary sources show broader CMMC total-compliance market at $2.1B (2024) to $6.7B (2033, ~15.8% CAGR) and a separate consulting-services estimate of USD 1.94B (2025) with a lower 5.21% CAGR to 2032; those indicate variation by scope (total compliance vs. consulting vs. third-party assessments). I used the explicit third-party projection as the closest match to the requested segment.

Cybersecurity assessment and remediation

Gap and posture assessments with actionable remediation engineering, risk mitigation, and policy guidance to close control gaps and improve security posture.

Market size: $15.4B CAGR: 8.2%
Estimate based on published figures for the niche assessment services market and the larger security-services segment. A market report excerpt (verified/summary) lists Cybersecurity Assessment Service market size at USD 15.4B in 2024 with an 8.2% CAGR; Statista shows Security Services (broader category) at US$107.22B in 2026, indicating assessment/remediation is a subsegment of security services and consistent with the selected estimate.
MA SE 2 references

Managed cloud and infrastructure operations

Proactive managed services for cloud applications, infrastructure and workplace environments with continuous optimisation and governance.

Market size: $122.0B CAGR: 9.1%
Primary estimate based on Fact.MR’s dedicated “Cloud Managed Services” report (USD 122.0B in 2025, CAGR 9.1%), which directly matches proactive managed cloud and infrastructure operations. MRFR’s broader Managed Services figures (USD 197.4B in 2024, CAGR ~7.2%) were used to show a larger market scope that includes non-cloud managed services. Fortune Business Insights’ cloud computing TAM (USD 781.27B in 2025) was referenced to contextualize total addressable cloud market supporting managed-services demand.
TH TH TH 3 references

Managed IT and vCIO

Accountable day-to-day IT operations combined with strategic IT leadership and board-ready reporting for regulated mid-market organizations.

Market size: $30.0B CAGR: 9.5%
Estimates use US managed-services benchmarks from MarketsandMarkets (US market USD 234.6B by 2031; 7.8% CAGR) and global context from CalitGroup. I assumed managed IT + advisory/vCIO revenue represents ~15–25% of total managed services, and that regulated mid-market organizations capture roughly 40–60% of that subsegment (higher outsourcing/compliance demand). Applying those ranges to the US market yields an estimated segment size near USD 30B and a growth potential modestly above the overall market (assumed premium due to regulatory/compliance-driven demand and advisory uptake).
PR US 2 references

Related Organizations

Common Questions

What does Systems Service Enterprises Inc. do?
Systems Service Enterprises Inc. (SSE) is a U.S.-based information technology, cybersecurity, compliance, and contracting solutions provider delivering services to clients across industries. SSE helps organizations navigate evolving regulatory requirements, achieve and maintain cybersecurity compliance, manage IT operations, and implement cloud and security-focused solutions. With a history dating back to 1966, SSE emphasizes client service and training, and positions itself as a trusted partner for readiness assessments, gap analyses, remediation, and ongoing compliance support.
What is Systems Service Enterprises Inc.'s role in the CMMC compliance market?
Assessment, remediation, and ongoing readiness services to achieve and maintain Cybersecurity Maturity Model Certification for defense contractors, including gap analysis, C3PAO assessment support, SPRS/NIST alignment, supply chain scoping, and vCISO guidance.
What is Systems Service Enterprises Inc.'s role in the Cybersecurity assessment and remediation market?
Gap and posture assessments with actionable remediation engineering, risk mitigation, and policy guidance to close control gaps and improve security posture.
How was the CMMC compliance market size estimate for Systems Service Enterprises Inc. calculated?
Primary basis: third-party CMMC services projection in the provided search results (growth from ~$56M pre-2024 to $3.5B by 2031). That trajectory implies very high CAGR (~80% between 2024–2031) for assessment/remediation/third-party readiness services. Secondary sources show broader CMMC total-compliance market at $2.1B (2024) to $6.7B (2033, ~15.8% CAGR) and a separate consulting-services estimate of USD 1.94B (2025) with a lower 5.21% CAGR to 2032; those indicate variation by scope (total compliance vs. consulting vs. third-party assessments). I used the explicit third-party projection as the closest match to the requested segment.
How was the Cybersecurity assessment and remediation market size estimate for Systems Service Enterprises Inc. calculated?
Estimate based on published figures for the niche assessment services market and the larger security-services segment. A market report excerpt (verified/summary) lists Cybersecurity Assessment Service market size at USD 15.4B in 2024 with an 8.2% CAGR; Statista shows Security Services (broader category) at US$107.22B in 2026, indicating assessment/remediation is a subsegment of security services and consistent with the selected estimate.
Systems Service Enterprises Inc. — company overview