162 Results for

National Security Jobs in O Fallon, IL

Jobs

Scott Air Force Base, IL10 days ago

$116,708–$150,000
Full-time
Employee

HII Mission Technologies seeks a current Reserve, Air National Guard or retired/separated U.S. military C-130/C-17/KC-135/KC-46/C-5 pilot or navigator to fill the role of a Mobility Air Forces Subject Matter Expert (SME) to support the Mobility Air Forces (MAF) Distributed Training Center (DTC) in O’Fallon, IL. Collaborates with MAF Aircrew Training Device providers and our customers to determine exercise requirements that will enable the units to meet the MAF DMO Program vision to enhance Global Reach through a network of live, virtual, and constructive training capabilities.

St. Louis, MO30+ days ago

$18–$19

We serve private neighborhoods, corporate offices, retail properties, industrial sites, and more — delivering proactive protection through visible presence and responsive service. Starting Pay: $18.00-20.00 per hour (depending on site and experience) with unlimited long-term earnings potential as part of GCI's Fast-Track Leadership Program.

St. Louis, MO30+ days ago

As a Security Ambassador – Tactical, physical ability is essential as you will be moving around your entire shift, patrolling environments such as retail stores, airports, detention centers, etc. GardaWorld Security is a global champion in sophisticated and tailored security solutions, employing and training highly skilled and dedicated professionals across the globe.

St. Louis, MO15 days ago

GardaWorld Security is a global champion in sophisticated and tailored security solutions, employing and training highly skilled and dedicated professionals across the globe. This policy applies to all terms and conditions of employment including, but not limited to hiring, placement, assignment, promotion, termination, layoffs, recalls, transfers, leaves of absence, compensation, and training.

St. Louis, MO30+ days ago

As a Security Officer – Tactical, physical ability is essential as you will be moving around your entire shift, patrolling environments such as retail stores, airports, detention centers, etc. GardaWorld Security is a global champion in sophisticated and tailored security solutions, employing and training highly skilled and dedicated professionals across the globe.

St. Louis, MO7 days ago

As a Security Officer – Concierge, there is a high focus on customer service since you will be working with people on all shifts, in environments such as office towers, hotels, shopping centers, etc. GardaWorld Security is a global champion in sophisticated and tailored security solutions, employing and training highly skilled and dedicated professionals across the globe.

Saint Louis, MO30+ days ago

St. Louis, MO30+ days ago

Saint Louis, MO21 days ago

Clayton, MO15 days ago

New!

St. Louis, MO3 days ago

Saint Louis, MO30+ days ago

Full-time

The Security Guard will be responsible for maintaining a visible presence on the retail floor, monitoring for suspicious activity, preventing theft, and ensuring the safety and security of all individuals within the premises. We are currently seeking a highly professional and detail-oriented Security Guard to provide asset protection and retail security at a high-end retail location.

St. Louis, MO15 days ago

Roxana, IL30+ days ago

As a Security Ambassador – Concierge, there is a high focus on customer service since you will be working with people on all shifts, in environments such as office towers, hotels, shopping centers, etc. GardaWorld Security is a global champion in sophisticated and tailored security solutions, employing and training highly skilled and dedicated professionals across the globe.

East St. Louis, IL30+ days ago

St. Louis, MO30+ days ago

Clayton, MO30+ days ago

Explore a career with A & Associates, one of the leading providers for temporary, temp-to-hire, permanent placement services and security guard services. The goal is to help the company in maintaining excellent working conditions by keeping our facilities safe and problem-free.

St. Louis, MO30+ days ago

$20–$25

This hybrid role blends 32 hours per week of post coverage with 8 hours of administrative and leadership duties, including site visits, officer coaching, and recruiting. We serve private neighborhoods, corporate offices, retail properties, industrial sites, and more — delivering proactive protection through visible presence and responsive service.

St. Louis, MO30+ days ago

$22–$22

In this role, you'll provide a strong, visible presence at high-risk or high-value sites, helping to deter crime, support client peace of mind, and respond decisively to potential threats. We serve private neighborhoods, corporate offices, retail properties, industrial sites, and more — delivering proactive protection through visible presence and responsive service.

Ferguson, MO30+ days ago

Full-time

The successful candidate will be responsible for maintaining a safe and secure environment across our premises by monitoring activities, enforcing safety protocols, and responding promptly to incidents. This role is vital in safeguarding personnel, property, and assets, ensuring peace of mind for all stakeholders.

St. Louis, MO18 days ago

Clayton, MO7 days ago

New!

Clayton, MO3 days ago

Saint Louis, MO30+ days ago

Creve Coeur, MO30+ days ago

Fenton, MO30+ days ago

St. Louis, MO30+ days ago

St. Louis, MO7 days ago

Des Peres, MO7 days ago

Fenton, MO30+ days ago

Full-time

As an Associate Project Manager, you will assist the Project Manager in the overall administrative and technical direction for one large complex project or direct smaller size projects under the supervision of a Project Manager. Assistant Project Managers may have overall bottom-line responsibility for profit and loss, and consequently carry the authority appropriately, and will provide technical and engineering support as required by the project assigned.

New!

St Louis, MO3 days ago

Associate's degree or higher in Business Management, Criminal Justice, or related field or equivalent work experience (4+ Years in Corporate Security) . Are you ready to manage a team of onsite security officers, ensuring a safe and secure work environment across corporate campuses?

St. Louis, MO18 days ago

Venice, IL8 days ago

St. Louis, MO30+ days ago

Hazelwood, MO8 days ago

Bridgeton, MO7 days ago

Brentwood, MO30+ days ago

St. Louis, MO30+ days ago

Saint Louis, MO30+ days ago

Edwardsville, IL30+ days ago

As a Security Officer – Surveillance, you will be the person spotting threats before they escalate in environments such as a security operations centers, call centers, parking gatehouses, etc. GardaWorld Security is a global champion in sophisticated and tailored security solutions, employing and training highly skilled and dedicated professionals across the globe.

St. Louis, MO30+ days ago

Special Response Ambassadors are cross-trained at multiple high-profile clients sites and are considered first responders to coverage needs throughout the region. GardaWorld Security is a global champion in sophisticated and tailored security solutions, employing and training highly skilled and dedicated professionals across the globe.

EAST ST. LOUIS, IL17 days ago

Our armed guard secures premises and personnel by patrolling property; monitoring surveillance equipment; inspecting buildings, equipment, and access points; permitting entry. Armed guards prevent losses and damage by reporting irregularities; informing violators of policy and procedures; restraining trespassers.

St. Louis, MO21 days ago

St.Louis, MO11 days ago

Clayton, MO30+ days ago

St Louis, Missouri30+ days ago

$112,000–$179,000 Per Year

Qualifications: Required: Master’s degree in Engineering, Computer Science, Information Technology, Management Information Systems, or related STEM degree program, or 18+ years of work experience as a Cyber Security Engineer may be considered in lieu of a degree. Desired: Expert working experience in government or industry leading enterprise-level cyber security efforts involving architecting, designing, development, and configuration of cloud and on premise based systems and software.

St. Louis, Missouri18 days ago

Join Allied Universal as an Armed Security Officer at a dynamic chemical and petrochemical location, where you will monitor and patrol assigned areas, perform vehicle and/or foot patrols, and stay visible to help to deter security-related incidents. This armed and driving post offers the chance to support daily operations through strong customer service, clear communication, and a people-first approach grounded in teamwork, reliability, and integrity.

St. Louis, Missouri18 days ago

Join Allied Universal as an Armed Security Officer at a dynamic chemical manufacturing location, where you will monitor and patrol assigned areas, help to deter security-related incidents, and support site operations through strong communication and customer service. Provide customer service to site personnel, visitors, and/or contractors by carrying out security-related procedures, location-specific policies, and when appropriate, emergency response activities in a chemical and industrial location.

New!

St. Louis, Missouri4 days ago

Join Allied Universal as an unarmed officer in a government location, where you will monitor and patrol assigned areas, stay visible to help to deter security-related incidents, and deliver outstanding customer service and communication. Conduct regular and random patrols throughout government location grounds, buildings, entrances, parking areas, and perimeter areas to help to deter unauthorized activity.

St. Louis, MO15 days ago

Resume Resources

Free Resume Templates Free Resume Builder

Get noticed by top employers!

Upload your resume to let employers know you're open to National Security job opportunities. Plus, receive relevant job recommendations in your inbox.

Create A Free Account

National Security Jobs in O Fallon, IL

MAF DMO AMC SME - 28408 Company Confidential

Unarmed Security Officer - Evenings & Overnights GCI Security

Security Officer - Airport Security Whelan Security

Flex Security Guard Gardaworld

Tactical Security Guard - Outdoor Patrol Whelan Security

Concierge Security - Patrol Officer Gardaworld

Concierge Security Patrol Officer Whelan Security

Concierge Security - Hotel Officer Whelan Security

Tactical Security - Patrol Officer Gardaworld

Tactical Security - Response Officer Gardaworld

Tactical Security - Roving Officer Gardaworld

Unarmed Security Officer BMS Security LLC

Airport Tactical Security Officer Gardaworld

Mobile Concierge Security Officer Whelan Security

Concierge Security Officer Whelan Security

Surveillance Roving Security Officer Whelan Security

MO- Security- Unarmed Corporate Security A & Associates

Armed Security Officer - Evenings/Overnights GCI Security

Armed Gas Station Security Officer GCI Security

MO- Security- Unarmed Security Officer $19hr. A & Associates

Concierge Security - Hiring Now Gardaworld

Concierge Security - Lobby Monitor Gardaworld

Concierge Security - Office Building Gardaworld

Concierge Security - Main Lobby Whelan Security

Concierge Security - Campus Patrol Whelan Security

Concierge Security Main Lobby Whelan Security

Concierge Security - Access Greeting Whelan Security

Surveillance Security - Access Officer Gardaworld

Concierge Security - Relief Officer Gardaworld

Associate Project Manager (National Travel) ArchKey Solutions LLC

Supervisor, Physical Security Officer SPECTRUM

Surveillance Security - Mobile Officer Gardaworld

Power Plant Surveillance Security Officer Gardaworld

Surveillance Security Officer Whelan Security

Surveillance Gate Security Officer Gardaworld

Surveillance Security - Truck Entrance Gardaworld

Surveillance Security Parking Garage Whelan Security

Surveillance Security Parking Patrol Whelan Security

Surveillance Security Patrol Unit Whelan Security

Surveillance Security - Data Entry Whelan Security

Special Response Security Officer Whelan Security

ARMED Security Officer Gamma Team Security Inc

Tactical Security Airport Officer Gardaworld

Surveillance Security - Guard House Gardaworld

MO - Unarmed Security - $18.00/hr A & Associates

Cyber Security Engineer Peraton

Security Officer Armed Driver Response Allied Universal

Security Officer Armed Patrol Driver Allied Universal

Security Officer Part Time Patrol Focus Allied Universal

Special Security Response Officer Gardaworld

Resume Resources