Warning: A non-numeric value encountered in /home/customer/www/securitypersonnel.com/public_html/wp-content/themes/Divi/functions.php on line 5467


SPI Security Keeps Your Workplace Safe


Observe. Deter. Detect. React.


SPI trained uniformed security guards and loss prevention specialists add extra customer support as our guards are trained to understand your business, fit in and help to make your customers more comfortable.


We help create an environment that deters shoplifting crime and boosts sales or activity. Just the presence of our uniformed guards deters criminal behavior and increases the chances of criminals getting caught. 


Our goal is to scare thieves but not intimidate customers or employees. Our clients tell us they get peace of mind knowing their place is watched and secure.



We are your extra eyes observing, confronting, and redirecting.

Uniformed Security

Uniformed security guards act as a deterrent to potential criminals, are quickly spotted in an emergency and provide peace of mind. SPI hires and trains professional, proactive uniformed guards and manages them so you don’t have to.

Loss Prevention

We develop and implement policies and procedures at your business to help you reduce and prevent loss before it happens. Whether you need a new strategy, or need professionals to execute on your current strategy, SPI has the loss prevention specialists you need.

Special Security Services

SPI understands that an out-of-the-box solution will not work for every business. That’s why we perform a customized risk profile to create and execute the best security strategy for your unique business needs.

Our Experience

Since 1971, SPI has served a wide variety of businesses in Southeastern Wisconsin. As a local security leader, SPI has experience providing protection and other special services across many industries. Over the last four decades, we have worked hard to establish ourselves as an effective and respected security firm. Our clients are our number one priority and you can rest assured that our officers, consultants, and other professional team members will report to duty on time, work hard, and handle every situation with respect and competence.

Here are some of the industries we serve:


Office Buildings









Nursing Facilities



Apartment Communities



Retirement Communities






Manufacturing Facilities



Transportation Facilities






Industrial Facilities



Construction Sites



Whether you are looking for a security team for a short-term job or are in need of long-term assistance, we are here for you. 

Uniformed Security

Loss Prevention

Special Security Services

Security Guard Services

Unarmed Security Officers

14 Hour Patrol Services (Mobile Patrol)

Access Control

Roving Vehicle Patrol Services with Marked Squad Cars

Loss Prevention

Receptionist/Command Center Operators

We have the resources and contacts necessary to ensure the safety of your business and employees.


SPI Meets Custom Loss Prevention Needs For Large Grocery Change

One of Wisconsin’s largest grocery chains had experienced underperforming security services from a number of companies, including several well-known national security firms.

SPI appointed an account manager and a dedicated loss prevention manager to properly manage the specific needs of the client. Security services performed include:

Uniformed security
Loss prevention
Mobile patrol
SPI officers wear a variety of uniforms, each one appropriate for the clientele of the store and each neighborhood.

Billing is also tailored to their needs … in this case the convenience of one invoice per week for all of their locations.

SPI Provides Access Control and Inservice Training For Government Services Contractor

A large national government services contractor with multiple local offices has used SPI successfully for a decade to help with crowd and access control at their locations.

In response to this client’s concerns, SPI brought in a consultant to provide in-service training to the client’s employees in the area of workplace violence. This training session better prepared the clients’ employees in the event of an incident and also allowed them to better interact with the SPI security officers at their location.