Insights

Private security focus Target high-value corporate and private clients seeking advanced surveillance and covert investigation capabilities, emphasizing NSIU's coast-to-coast coverage and worldwide network.

Growth potential Leverage mid-market revenue profile to upsell managed investigative solutions, enterprise-grade reporting, and automated case workflows to firms expanding risk management and due diligence programs.

Technology leverage Highlight usage of standard enterprise tools and secure infrastructure (Microsoft 365, Imperva, Apache) to position NSIU as a tech-enabled investigator capable of compliant, auditable evidence collection.

Strategic partnerships Explore alliances with risk assurance, legal, and insurance services to cross-sell investigative services to clients of similar firms in the listed comparable companies.

Reputation signals Emphasize proven results and industry-standard performance to overcome skepticism in sensitive investigations, targeting firms that require discreet, high-trust verification and nationwide coverage.

Similar companies to National SIU

National SIU Tech Stack

National SIU uses 8 technology products and services including WordPress, Microsoft 365, Google Fonts API, and more. Explore National SIU's tech stack below.

  • Content Management System
  • Google Fonts API
    Font Scripts
  • jQuery Migrate
    Javascript Libraries
  • PHP
    Programming Languages
  • Security
  • YouTube
    Video Players
  • Apache
    Web Servers

National SIU's Email Address Formats

National SIU uses at least 3 email formats:
National SIU Email FormatsExamplePercentage
FLast@nsiu.comJDoe@nsiu.com
38%
First@nsiu.comJohn@nsiu.com
37%
First.Last@nsiu.comJohn.Doe@nsiu.com
25%

Frequently Asked Questions

What is National SIU's phone number?

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You can contact National SIU'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 National SIU's official website and social media links?

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National SIU's official website is nsiu.com and has social profiles on LinkedIn.

How much revenue does National SIU generate?

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As of August 2026, National SIU's annual revenue is estimated to be $1M - $10M.

What is National SIU's SIC code and NAICS code?

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National SIU's SIC code is 7381 - Detective, Guard, and Armored Car Services and NAICS code is 5616 - Investigation and Security Services.

How many employees does National SIU have currently?

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As of August 2026, National SIU has approximately 10 employees across 1 continents, including North America. Key team members include : R. K. Explore National SIU's employee directory with LeadIQ.

What industry does National SIU belong to?

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National SIU operates in the Security and Investigations industry.

What technology does National SIU use?

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National SIU's tech stack includes WordPress, Microsoft 365, Google Fonts API, jQuery Migrate, PHP, Imperva, YouTube and Apache.

What is National SIU's email format?

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National SIU's email format typically follows the pattern of FLast@nsiu.com. Find more National SIU email formats with LeadIQ.
National SIU logo

National SIU

Security and InvestigationsIllinois, United States2-10 Employees

National SIU is a private security and investigations firm based in Schaumburg, Illinois, offering investigative solutions for private individuals and corporate clients. The company specializes in surveillance and covert investigations, aiming to produce results with evidence and strategies that align with industry expectations, and it claims the ability to cover coast to coast through a network of investigative specialists. With a focus on providing detailed findings, the firm serves clients seeking dispute resolution, risk assessment, or corroborating information, across a broad geographic scope. The organization operates in a niche of professional investigations and is positioned to support clients needing discreet, efficient investigations delivered with practical outcomes.

Section iconCompany Overview

Phone number
Website
nsiu.com
SIC Code
7381 - Detective, Guard, and Armored Car Services
NAICS Code
5616 - Investigation and Security Services
Employees
2-10

Section iconFunding & Financials

  • $1M - $10M

    National SIU's revenue is estimated to be in the range of $1M - $10M

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