6,223 Results for

OT Jobs in Aurora, IL

Jobs

Project Engineer Level 4 The Structures Company, LLC

Berkeley, MO

Advanced technical education from accredited course in engineering, computer science, mathematics, physics or chemistry (e.g., Bachelor’s Degree) with typically 9 or more years related work experience, or equivalent combination (Master’s +7 years, PhD +4 years). Knowledge of basic electronic components (resistors, capacitors, diodes, inductors, transformers, connectors, integrated circuits) and how to research alternate components using data sheets and other internet resources.

30+ days ago

Quality Engineer 3 The Structures Company, LLC

Hazelwood, MO

Bachelor of Science degree in Engineering, Engineering Technology (including Manufacturing Technology), Computer Science, Data Science, Mathematics, Physics, Chemistry, or related field. As trusted partners to leading aerospace and defense OEMs and Tier 1 suppliers, we connect professionals with career opportunities to grow and excel in aviation, aerospace, and defense.

30+ days ago

Endpoint Security Engineer III - Nessus CACI

Saint Louis, Missouri

$75,200–$158,100 / year

Job Title: Endpoint Security Engineer III - NessusJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: TS/SCIEmployee Type: RegularPercentage of Travel Required: Up to 10%Type of Travel: Local* * * The Opportunity: CACI has an exciting opportunity for a Senior Endpoint Security Engineer to join our Transport & Cybersecurity Services (TCS) team in either Springfield, VA or St. Working knowledge of maintaining Enterprise Cyber Security Engineering requirements utilizing all or some of the following tools: Tenable Suite that include Security Center, Nessus Scanners, Nessus Manager with hands-on administrator experienceStrong working knowledge of Linux operating systems, including installation, configuration, and maintenance.

11 days ago

Manufacturing Welding Engineer Ultimate Staffing Services

St. Louis, Missouri

$90,000

You'll be involved in everything from weld fixture design and process development to programming and equipment specification, supporting a wide range of welding methods including MIG, TIG, spot, and flash welding. This engineer will take the lead in identifying and resolving quality and process challenges, analyzing production issues, and implementing innovative solutions that enhance efficiency and elevate product quality.

30+ days ago

Systems Engineer SME Leidos Holdings Inc

St. Louis, MO

$131,300–$237,350 / year

You'll also be expected to provide feedback to the system technical development leads and test engineers to make the software and testing more effective and reliable and maintain system documentation and make presentations to end users and Government managers. As a Systems Engineering SME, you'll serve as the technical authority for systems engineering activities, helping shape the architecture and future direction of a mission-critical application while ensuring engineering excellence across the program.

8 days ago

Release Train Engineer CACI

O'fallon, Illinois

$90,300–$189,600 / year

Job Title: Release Train EngineerJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: SecretEmployee Type: RegularPercentage of Travel Required: Up to 10%Type of Travel: Local* * * The Opportunity: As the Release Train Engineer, you will be a servant leader working closely with government leadership, scrum masters, Agile teams and the entire ART to facilitate ART events and coach the ART in delivering value. Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications.

8 days ago

Advanced Cybersecurity Analytics Engineer III CACI

Saint Louis, Missouri

$75,200–$158,100 / year

Job Title: Advanced Cybersecurity Analytics Engineer IIIJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: TS/SCIEmployee Type: RegularPercentage of Travel Required: Up to 10%Type of Travel: Local* * * The Opportunity Reporting to the Lead of Focused Operations, under the Branch Chief of Defensive Cyber Operations, you will be tasked with developing and maintaining defensive countermeasures for the enterprise. Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications.

17 days ago

AppSec Engineer CACI

O'fallon, Illinois

Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. In this role, you will shape and elevate AppSec across a complex, modern application ecosystem—leading testing operations, influencing secure development practices, and mentoring the next generation of security engineers.

10 days ago

Project Engineer Steel Procurement Clayco Inc

St. Louis, MO

With $8.1 billion in revenue for 2025, Clayco specializes in the ''art and science of building,'' providing fast track, efficient solutions for mission critical, industrial, life sciences, power & energy, aviation, commercial, institutional, residential and sports & entertainment related building projects. The Project Engineer plays a critical role in maintaining schedule integrity, verifying material accuracy and completeness, resolving delivery and fabrication issues, and supporting overall project execution.

8 days ago

Senior Java Engineer IT.HR Recruitment Agency

Saint Louis, Missouri

For our client, a rapidly growing international consulting company specialising in software engineering, we are looking for an experienced Java Developer to join a team delivering large-scale and business-critical projects. Collaborate closely with engineers, product owners, and stakeholders to design and build scalable, distributed solutions that deliver excellent user experiences.

15 days ago

CI/CD and Platform Automation Engineer Science Applications International Corp

St. Louis, MO

Our robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. We integrate emerging technology, rapidly and securely, into mission critical operations that modernize and enable critical national imperatives.

6 days ago

Cyber Security Engineer - NSS Tools CACI

Saint Louis, Missouri

$75,200–$158,100 / year

Job Title: Cyber Security Engineer - NSS ToolsJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: TS/SCIEmployee Type: RegularPercentage of Travel Required: Up to 10%Type of Travel: Local* * * The Opportunity Network Defense is at the forefront of integrating advanced Linux systems into our cybersecurity framework. Bachelor’s degree in Computer Science, Information Technology, Computer Engineering, or Electrical Engineering.7+ years of related experience in SEIM, network operations, network engineering, leading technology teams, leading operation cybersecurity teams, or a combination thereof.-.

24 days ago

Test Automation Engineer CACI

O'fallon, Illinois

$75,200–$158,100 / year

Job Title: Test Automation EngineerJob Category: EngineeringTime Type: Full timeMinimum Clearance Required to Start: SecretEmployee Type: RegularPercentage of Travel Required: Up to 10%Type of Travel: Local* * * The Opportunity: Join our team supporting USTRANSCOM's Joint Transportation Management System (JTMS), a mission-critical enterprise platform that modernizes transportation, logistics, and financial operations through SAP S/4HANA ERP integration. Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications.

28 days ago

Staff Software Engineer / Architect Java Modernization (AWS / Kubernetes) Yantran LLC

OFALLON, MO

Position Title: Staff Software Engineer / Architect – Java Modernization (AWS / Kubernetes). to lead the modernization of a largescale, mission critical Java platform.

30+ days ago

Software Test Engineer - Payments Yantran LLC

OFALLON, MO

The ideal candidate will have extensive experience in Java 8, Spring framework, and Kafka, and will be responsible for designing, developing, and maintaining robust backend systems that support our innovative payment solutions. Job Summary: We are seeking a skilled Software test Engineer with Payment Background with a strong background in software development to join our dynamic team.

30+ days ago

Automation Controls Engineer AFB International

O'Fallon, Missouri

As part of Ensign-Bickford Industries, Inc. (EBI) , a privately-owned high-technology conglomerate, AFB International operates across multiple global locations, including the United States (global headquarters), Europe, Latin America, Mexico, Australia, and China. Our specialized palatants improve the flavor and nutritional value of pet foods, treats, and supplements, ensuring pets receive the essential nutrients they need.

17 days ago

Mechanical Engineer Department of the Army

Scott AFB, IL

$109,137–$141,880 / year

In addition to meeting the basic requirement above, to qualify for this position you must also meet the qualification requirements listed below: Specialized Experience: One year of specialized experience which includes 1) evaluating and developing mechanical engineering solutions for the design and deployment of surface vehicles or oversized/overweight systems to ensure transportability and mission readiness; 2) independently conducting engineering analyses and feasibility studies to resolve complex technical challenges related to vehicle or system capability and performance; 3) determining the scope, requirements, and scheduling for mechanical engineering projects, including planning and coordinating assessments and studies; AND 4) maintaining liaison with internal and external organizations, representing the agency in technical meetings and working groups to facilitate successful project completion. FOREIGN EDUCATION: If you are using education completed in foreign colleges or universities to meet the qualification requirements, you must show the education credentials have been evaluated by a private organization that specializes in interpretation of foreign education programs and such education has been deemed equivalent to that gained in an accredited U.S. education program; or full credit has been given for the courses at a U.S. accredited college or university.

30+ days ago

Mechanical Engineer II SERVICE SOURCE INC

St Louis, MO

This shall include, but is not limited to energy management, decommissioning, Building Automation System (BAS) administration and operation, Computer Aided Design & Drafting (CADD), and Building Information Modeling/Management (BIM) efforts in support of daily facility operations, maintenance technical support, and project development as well as project management and execution services. However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractors legal duty to furnish information.

30+ days ago

Senior Mechanical Power Engineer HDR Inc

St Louis, MO

United States-Missouri-St Louis'',''United States-Missouri-St Louis'',''United States-Missouri-Kansas City'',''United States-Missouri-Kansas City'','''','''','''','''','''','''',''Power'',''Power'',''Full-time'',''Full-time'',''Regular'',''Regular'','''','''',''Power Generation'',''Power Generation'',''Aug 5, 2026'',''Aug 5, 2026'',''false'',''789216'',''789216'',''true'',''789216'',''false'',''Submission for the position: Senior Mechanical Power Engineer - (Job Number: 195053)'',''false'',''789216'',''false'',''true''. Our eight Employee Network Groups (Asian Pacific, Black, Hispanic/Latino(a), LGBTQ+, People with Disabilities, Veterans, Women, Young Professionals) help create a sense of belonging and foster a supportive environment where everyone is empowered to engage and contribute.

7 days ago

Mechanical Engineer Arch Precision, LLC

Earth City, MO

Full time

Production Support & Troubleshooting: Resolving daily operational, software, or hardware problems on the factory floor, including troubleshooting, repairing, or redesigning equipment. Process Improvement & Development: Designing new production methods, optimizing existing workflows, and implementing technologies to increase efficiency and lower costs.

30+ days ago

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OT Jobs in Aurora, IL

Project Engineer Level 4 The Structures Company, LLC

Quality Engineer 3 The Structures Company, LLC

Endpoint Security Engineer III - Nessus CACI

Manufacturing Welding Engineer Ultimate Staffing Services

Systems Engineer SME Leidos Holdings Inc

Release Train Engineer CACI

Advanced Cybersecurity Analytics Engineer III CACI

AppSec Engineer CACI

Project Engineer Steel Procurement Clayco Inc

Senior Java Engineer IT.HR Recruitment Agency

CI/CD and Platform Automation Engineer Science Applications International Corp

Cyber Security Engineer - NSS Tools CACI

Test Automation Engineer CACI

Staff Software Engineer / Architect Java Modernization (AWS / Kubernetes) Yantran LLC

Software Test Engineer - Payments Yantran LLC

Automation Controls Engineer AFB International

Mechanical Engineer Department of the Army

Mechanical Engineer II SERVICE SOURCE INC

Senior Mechanical Power Engineer HDR Inc

Mechanical Engineer Arch Precision, LLC

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