1,275 testing jobs at 399 companies in O'Fallon, MO

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Specialist, Personalization & Testing
Clayton, Missouri, United States
OnsiteFull Time
Caleres
CaleresNYSE: CAL: Designs and retails a global portfolio of footwear brands.
Plan and execute A/B/n tests, conduct quantitative and qualitative customer research, develop personalization tactics, define test success metrics, and collaborate with analytics and cross-functional teams. Bachelor's preferred; 1-3 years preferred.
Microsoft Office, Adobe Analytics, Sitecore, Quantum Metric
1mo
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Mechanical Testing Technician
St. Louis, Missouri, United States
$21-$26/hr OnsiteFull Time
Industrial Inspection & Analysis
Industrial Inspection & Analysis: Provides industrial inspection, testing, and engineering services to businesses.
High school diploma or equivalent, basic understanding of materials lab testing and standards (ASTM/ASME), ability to operate precision measuring and mechanical testing equipment, proficiency in Microsoft Office/Excel, valid state driver’s license, and adherence to safety/quality standards.
Microsoft Office, Microsoft Excel, Instron mechanical test systems, dial caliper, micrometer, ASTM, ASME
4w
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Specialist, Personalization & Testing
Clayton or St. Louis
OnsiteFull Time
Caleres
CaleresNYSE: CAL: Designs and retails a global portfolio of footwear brands.
Experience with personalization and A/B/n testing, quantitative and qualitative customer research, Microsoft Office, web analytics and CMS experience; bachelor's degree preferred; 1-3 years of related experience preferred.
Microsoft Office, web analytics, Adobe Analytics, Sitecore, Quantum Metric
3mo
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Manager, System & Device Testing
St. Louis, Missouri, United States
OnsiteFull Time
Stereotaxis
StereotaxisNYSE American: STXS: Manufactures robotic surgical systems for endovascular and cardiac procedures.
5+ YOE1+ MgmtManage system and device testing team; develop verification plans; manage schedules; ensure product quality; document tests.
3w
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Global SAP Release & Testing CoE
Chesterfield, Missouri, United States
OnsiteFull Time
Bunge
BungeNew York Stock Exchange: BG: Connecting farmers to consumers with agricultural commodities and food ingredients.
11+ YOEBachelor's degree and 11+ years related experience; deep SAP release, change, transport, and testing expertise; test automation (Tosca) experience; strong analytical, communication, and stakeholder management skills.
SAP, Tosca
2mo
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Network Segmentation Testing Specialist
Minneapolis or Charlotte or Cincinnati or Tempe or Saint Louis or Irving
$120k-$141k/yr OnsiteFull Time
U.S. Bank
U.S. BankNYSE: USB: Provider of personal, business, and institutional financial services.
8+ YOEBachelor's degree or equivalent; typically 8+ years of experience; PCI DSS testing, network segmentation, Linux scripting; strong communication and collaboration skills.
Linux, PCI DSS, Microsoft Office
1mo
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Systems Integration Testing Engineer
St Louis or Springfield or King of Prussia
$112k-$179k/yr OnsiteFull Time
Peraton
Peraton: National security and mission-critical government technology services provider.
8+ YOERequires Top Secret clearance (willing to upgrade to TS/SCI with poly), BS in engineering or related science, 8+ years systems engineering experience (6+ with MS), experience with sensor imaging systems and test design, strong communication skills.
National System for Geospatial-Intelligence (NSG), electrical-optical, RADAR, LIDAR, OPIR, EO/IR/SAR, multi- and hyper-spectral, Tasking, Collection, Processing, Exploitation and Dissemination (TCPED)
1mo
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Systems Integration Testing Engineer
St Louis, Missouri, United States
$112k-$179k/yr OnsiteFull Time
Peraton
Peraton: Provides advanced technology and mission support for government agencies.
6+ YOEMust hold Top Secret clearance and be willing to upgrade to TS/SCI with polygraph. BS in systems/electrical/physics/software engineering (or related) with 8 years' systems engineering experience (6 years with Master's). Experience in sensor imaging systems, test design, data verification, and strong written/oral communication required.
3mo
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Construction Materials Testing Technician
O'Fallon, Illinois, United States
$18-$22/hr OnsiteFull Time
SCI Engineering
SCI Engineering: Provides professional geotechnical, environmental, and construction materials engineering services.
0+ YOEHigh school diploma or equivalent; no experience required; valid driver's license and insurance; must be able to travel daily to office and job sites; overtime/weekend availability; able to lift up to 75 lbs; outdoors preferred.
5d
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SkillBridge Nondestructive Testing/Inspection (NDT) Technician
Berkeley, Missouri, United States
$71k-$106k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designs and builds airplanes, satellites, and defense systems.
1+ YOEMust complete Boeing NDT certification, obtain Secret clearance, high school diploma or equivalent, formal NDT training (Level II in at least one method), vision exam, and experience with tools; SkillBridge candidates eligible.
Microsoft Outlook, Microsoft PowerPoint, Microsoft Excel, Microsoft Word
2w
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Clinical Testing Psychologist
St. Louis, Missouri, United States
$115k-$140k/yr HybridFull Time
LifeStance Health
LifeStance HealthNASDAQ: LFST: Provides outpatient behavioral healthcare and mental health services.
Missouri licensure and doctorate (Ph.D. or Psy.D.), experience conducting assessments and test batteries, report writing and feedback, testing intakes, and providing psychotherapy; productivity-based compensation.
Telemedicine
1mo
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Technician I - Testing
St. Louis, Missouri, United States
OnsiteFull Time
Tremco Construction Products Group
Tremco Construction Products GroupNYSE: RPM: Manufactures integrated building envelope systems and roofing materials.
1+ YOEHigh school diploma or equivalent; preferred 1 year college-level chemistry or 1 year lab experience. Must pass Jaeger eye test, respirator medical evaluation and pulmonary function test; able to lift 50 lbs and follow PPE and OSHA safety procedures.
Microsoft Teams, Microsoft Word, Microsoft Excel
2mo
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Psychological & Neuropsychological Testing Psychologist
St. Louis, Missouri, United States
HybridFull Time
Universal Health Services
Universal Health ServicesNYSE: UHS: Operates acute care hospitals and behavioral health facilities.
Doctoral degree in clinical mental health field and Missouri licensure; experience in psychological/neuropsychological testing; credentialing-eligible for managed care; 90-day credentialing wait.
Psychological Testing, Neuropsychological Testing, Report Writing, Credentialing
1mo
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Field Technician I - Construction Materials Testing
St. Louis, Missouri, United States
FieldFull Time
Intertek
IntertekLondon Stock Exchange: ITRK: Provides global testing, inspection, and certification services for products.
1+ YOE1 year construction-related field experience, valid driver’s license, ability to lift 30–50+ lbs, work outdoors and at heights, perform site testing and documentation; ACI certification and high school diploma preferred.
2mo
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R&D Engineer - Codes, Standards & Product Testing
Earth City, Missouri, United States
OnsiteFull Time
MiTek
MiTekNYSE: BRK-B: Provides software and automation for the building industry.
2+ YOEBachelor’s in Civil or Mechanical Engineering; 1-2 years experience; on-site Testing/Regulatory knowledge; strong communication and teamwork.
1mo
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Nurse Practitioner - Pre-Admission Testing Center
Saint Louis or St. Louis County
$96k-$156k/yr OnsiteFull Time
BJC Health System
BJC Health System: Non-profit health system providing comprehensive hospital and clinical care.
0+ YOEMaster's in Nursing (NP program) required, NP and RN licensure required, accepts candidates with less than 2 years' experience; preferred 2-5 years. Strong clinical assessment, diagnosis, prescribing, care coordination, and teaching skills.
4d
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Laboratory Analyst - Eurofins Environment Testing, Earth City MO
Earth City, Missouri, United States
$17-$20/hr OnsiteFull Time
Eurofins Scientific
Eurofins ScientificEuronext Paris: ERF: Global provider of analytical testing and laboratory services.
Associate degree in chemistry or equivalent experience; entry-level environmental lab duties; able to lift up to 50 lbs; authorized to work in the U.S. without sponsorship; English proficiency required.
LIMS, Gas Chromatography, Gas Chromatography/Mass Spectrometry, Atomic Absorption, ICP
1mo
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Software Developer II - Financials (Full Stack, Front End)
Cedar Rapids or Lake Saint Louis or Mandan or United States
HybridFull Time
NISC
NISC: Provides enterprise software solutions for utility and broadband cooperatives.
5+ YOE5+ years software development experience; proficiency with Angular, TypeScript, Java, Postgres/Oracle, AWS, Kubernetes, Spring Boot, Kafka, Cassandra, Git; experience with automated testing, microservices, and agentic AI coding tools.
Angular, TypeScript, GWT, Java, Postgres, Oracle, AWS, Kubernetes, Spring Boot, Kafka, SSO, Cassandra, Spark, Databricks, .NET, SQL, Big Data, Microservices, Git, JIRA, Confluence, Bitbucket, Bamboo, Agentic AI, Claude Code, Augment, JetBrains Junie, GitHub Copilot, Cursor, OpenAI Codex, Agile, Scrum, SDLC, Automated Testing
1mo
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Flight Test Lead
Berkeley, Missouri, United States
$127k-$171k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
7+ YOEBachelor's degree in engineering/related field, 7+ years flight test experience, 50+ missions as Test Conductor/Test Director, experience on military flight test programs, ability to obtain U.S. Secret security clearance, willing to travel up to 25%.
1w
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Test Engineer I
Earth City, Missouri, United States
$123k/yr OnsiteFull Time
Ingersoll Rand
Ingersoll RandNYSE: IR: Designs and manufactures mission-critical industrial flow and compression equipment.
1+ YOEBachelor's in engineering,1+ year lab/testing or manufacturing experience,testing and troubleshooting skills,technical math and communication skills.
LabVIEW, DAQ