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.

Scrimba
Skills you'll gain: Object Oriented Programming (OOP), File I/O, Python Programming, Data Structures, Computer Programming, Software Engineering, Performance Tuning, Web Development, Performance Testing, Debugging, Web Development Tools
Intermediate · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Object Oriented Design, JUnit, Object Oriented Programming (OOP), Unified Modeling Language, Software Design Patterns, Software Testing, Java, Software Engineering, Java Programming, User Interface and User Experience (UI/UX) Design, Unit Testing, Software Design, Software Architecture, API Design, Model View Controller, Software Development, Test Driven Development (TDD), Programming Principles, Conceptual Design, Databases
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Threat Modeling, Vulnerability Assessments, Vulnerability Scanning, Business Continuity Planning, Business Continuity, Risk Analysis, Risk Management Framework, Threat Management, Vulnerability Management, Cyber Security Assessment, Cyber Risk, Risk Management, Contingency Planning, Risk Mitigation, Risk Modeling, Disaster Recovery
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Fire And Life Safety, Safety Assurance, Safety Standards, Building Codes, Hazard Communication (HazCom), Electrical Systems, Control Systems, Systems Integration, Emergency Response, Engineering Practices, Communication Systems, Regulatory Compliance, Control Panels
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: ISO/IEC 27001, Threat Management, Security Management, Risk Management Framework, Data Security, Cyber Risk, Risk Management, Vulnerability Management, Continuous Monitoring, Vulnerability Assessments, Cyber Security Policies, Security Controls, Risk Control, Governance Risk Management and Compliance, Cybersecurity, Information Systems, Scenario Testing, Asset Protection
Beginner · Course · 3 - 6 Months

Skills you'll gain: Restful API, Application Programming Interface (API), Authentications, Test Automation, JSON, Security Testing, Authorization (Computing), Java Programming, Scenario Testing, Java, Test Tools, Back-End Web Development
Intermediate · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: API Testing, Software Documentation, API Design, Application Programming Interface (API), Technical Documentation, Restful API, JSON, Software Design
Beginner · Guided Project · Less Than 2 Hours

Birla Institute of Technology & Science, Pilani
Skills you'll gain: Data Analysis, Statistical Analysis, Statistical Methods, Analysis, Quantitative Research, Data Visualization, Predictive Modeling, Applied Mathematics
Build toward a degree
Beginner · Course · 1 - 3 Months

Skills you'll gain: Data Storytelling, Data Presentation, Conversion Funnel Analysis, Dashboard, Data Pipelines, Strategic Prioritization, Customer Retention, Customer Analysis, Product Strategy, SQL, Data Analysis, Business Intelligence, Data Warehousing, Pandas (Python Package), Performance Metric, Statistical Analysis, Scikit Learn (Machine Learning Library), Decision Making, Resource Allocation, Python Programming
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Regression Analysis, Predictive Modeling, Exploratory Data Analysis, Model Evaluation, Model Training, Statistical Machine Learning, Scikit Learn (Machine Learning Library), Supervised Learning, Machine Learning Methods, Statistical Methods, Applied Machine Learning, Machine Learning, Data Preprocessing, Decision Tree Learning, Deep Learning, Data Analysis, Test Data, Artificial Neural Networks, Data Import/Export, Python Programming
Beginner · Guided Project · Less Than 2 Hours

Skills you'll gain: Mobile Development, Generative AI, Application Development, AI literacy, Test Automation, User Interface (UI), Responsible AI, Performance Tuning, Data Ethics, Automation, Analysis
Beginner · Course · 1 - 4 Weeks

Vanderbilt University
Skills you'll gain: Generative AI Agents, Java, Java Programming, Agentic systems, Agentic Workflows, AI Workflows, Generative AI, LLM Application, Tool Calling, OpenAI API, Application Development, Prompt Engineering, Large Language Modeling, Memory Management
Beginner · Course · 1 - 3 Months