Pen testing courses can help you learn vulnerability assessment, network security, and ethical hacking techniques. You can build skills in penetration testing methodologies, risk analysis, and incident response strategies. Many courses introduce tools like Metasploit, Wireshark, and Burp Suite, that support identifying and exploiting security weaknesses in systems and applications. By engaging with these tools, you can practice practical work that enhance your ability to secure networks and protect sensitive data.

Johns Hopkins University
Skills you'll gain: Home Health Care and Assisted Living, Infection Control, Personal protective equipment, Hand Hygiene, Emergency Response, Long Term Care, Nursing Homes, Patient Communication, Public Health and Disease Prevention, Laboratory Testing, Mental Health, Community Health, Public Health, Care Coordination, Media and Communications, Patient Education and Support, Epidemiology, Diagnostic Tests, Cleanliness, Infectious Diseases
★ 4.8 (268) · Beginner · Course · 1 - 3 Months

University of Colorado System
Skills you'll gain: Risk Management Framework, Infrastructure Security, Cyber Security Policies, Continuous Monitoring, Cyber Security Assessment, Security Management, Cyber Governance, Cybersecurity, Cyber Security Strategy, Cyber Risk, Computer Security, Scenario Testing, Dependency Analysis
★ 4.6 (181) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Data Migration, Cloud Storage, Data Management, Data Integration, Data Storage, Data Infrastructure, Data Storage Technologies, Data Architecture, Data Security, File Systems, Data Loss Prevention
★ 4.8 (37) · Intermediate · Course · 1 - 4 Weeks

Kennesaw State University
Skills you'll gain: Six Sigma Methodology, Lean Six Sigma, Statistical Hypothesis Testing, Statistical Analysis, Analysis, Statistical Methods, Root Cause Analysis, Quality Improvement, Statistical Inference, Process Analysis, Correlation Analysis, Probability & Statistics, Risk Analysis, Regression Analysis, Variance Analysis, Sample Size Determination, Sampling (Statistics)
★ 4.4 (54) · Mixed · Course · 1 - 3 Months

Institut Mines-Télécom
Skills you'll gain: Wireless Networks, Network Architecture, Software-Defined Networking, Network Planning And Design, Virtual Networking, Network Security, Service Oriented Architecture, Emerging Technologies, Network Protocols, Telecommunications, Mobile Security, Interoperability, Digital Communications, Authentications, Encryption, Authorization (Computing)
★ 4.6 (119) · Intermediate · Course · 1 - 3 Months

Coursera
Skills you'll gain: AI Security, Threat Modeling, Open Web Application Security Project (OWASP), Security Testing, Retrieval-Augmented Generation, Software Architecture, API Design, Test Automation, Vulnerability Management, Agentic systems, Systems Design, Model Evaluation, Test Driven Development (TDD), CI/CD, Python Programming, Continuous Deployment, Dependency Analysis, Large Language Modeling, Machine Learning, Performance Analysis
Intermediate · Specialization · 3 - 6 Months

IIT Bombay
Skills you'll gain: Internet Of Things, Network Protocols, Wireless Networks, General Networking, Interoperability, Emerging Technologies, Data Analysis, Communication Systems, Systems Design, Regression Analysis, Systems Architecture, Unsupervised Learning
★ 4.7 (86) · Intermediate · Course · 1 - 4 Weeks

University of Cambridge
Skills you'll gain: Criminal Investigation and Forensics, Molecular Biology, Healthcare Ethics, Specimen Collection, Scientific Methods, Molecular, Cellular, and Microbiology, Biostatistics, Life Sciences, Laboratory Techniques, Biotechnology, General Science and Research, Analytical Testing, Research, Biology, Emerging Technologies
★ 4.9 (14) · Beginner · Course · 1 - 3 Months

Scrimba
Skills you'll gain: Object Oriented Programming (OOP), File I/O, Data Structures, Python Programming, Programming Principles, Computer Programming, Computational Logic, Software Engineering, Performance Tuning, Web Development, Performance Testing, Web Development Tools, Debugging, Software Development
★ 4.6 (72) · Beginner · Specialization · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Operations Research, Algorithms, Graph Theory, Network Model, Combinatorics, Mathematical Software, Mathematical Modeling, Theoretical Computer Science, Model Optimization, Python Programming
★ 4.8 (62) · Advanced · Course · 1 - 4 Weeks

Infosec
Skills you'll gain: Secure Coding, C and C++, Application Security, Computer Programming Tools, System Programming, C++ (Programming Language), Software Development Tools, Exploit development, C (Programming Language), Security Software, Debugging, Security Engineering, Security Testing, Interoperability, Unix, Embedded Software, Information Systems Security, OS Process Management, Embedded Systems, Programming Principles
★ 2.7 (36) · Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Node.JS, Unit Testing, Server Side, Javascript, Debugging, Back-End Web Development, File Systems, File I/O, Test Script Development, Software Testing, Development Testing, Web Applications, Event-Driven Programming, Code Reusability
★ 3.8 (86) · Intermediate · Course · 1 - 3 Months