How to Become an Investigator: Starting Strong and Building Real Expertise

headshot of Nico Dekens – aka “Dutch OSINT Guy”Nico Dekens – aka “Dutch OSINT Guy”
26 May 2026
Investigator reviewing evidence and connecting clues on a case board in an office while holding a tablet during an active investigation
Key Takeaway

Becoming an investigator is less about a specific degree or starting role and more about developing strong investigative thinking, such as curiosity, structured analysis, ethical research, and continuous hands-on practice.

Becoming an investigator isn’t about a single qualification or a dramatic first case, it’s about developing a mindset. Strong investigators are curious, disciplined, and methodical. They learn how to ask the right questions, verify information, and remain objective even when evidence points toward an easy answer. Many begin their careers through adjacent roles in research, intelligence analysis, cybersecurity, law enforcement support, journalism, or compliance where investigative thinking is used daily. Early on, the most important step is learning the fundamentals: ethical research, source evaluation, digital literacy, and structured analysis.

A successful investigator builds credibility through consistency. That means learning how to document findings clearly, understanding legal and ethical boundaries, and becoming comfortable working with uncertainty. Free training, OSINT exercises, and hands-on challenges such as Capture-The-Flag competitions help translate theory into practice. Employers don’t just look for knowledge, they look for evidence of sustained effort, curiosity, and the ability to learn independently.

Infographic titled ‘Become an Investigator’ outlining the progression from foundational investigative skills and OSINT training to hands-on practice, portfolio building, specialized certifications, and long-term career development across investigative sectors.
Become an Investigator infographic showing core investigative skills, OSINT training paths, practical experience strategies, specialization areas, and career development stages for modern investigators.

Free Courses and Training: OSINT, Intelligence and Investigation

Open-Source Intelligence (OSINT) Tools and Courses

1. ShadowDragon Free Tools Library: Variety of free investigation tools to help expand investigations

2. ShadowDragon OSINT Guide: Thinking in OSINT: A Field Guide to Questions, Reasoning, and Real-World Judgment

3. Free Learning Tools

4. FreeOSINT.org Training Modules

  • Self-paced OSINT curriculum (beginner → advanced).
  • Topics: intro to OSINT, digital footprint analysis, social media investigations, ethics.

5. Introduction to OSINT (SecurityBlue.Team): Beginner-friendly free OSINT course covering intelligence lifecycle, search techniques (Google Dorks, social media), analytical basics.

6. Newsletters

7. Fundamentals of Open-Source Intelligence (Alison): Free course on OSINT foundations and how OSINT supports cybercrime investigations; get a certificate at no cost.

8. AFP OSINT Starter Pack Training: Open-source training linked from OSINT Starter Pack, including basics plus digital investigation modules (verification, geo-location, disinformation).

9. UNOCT OSINT for Counter-Terrorism: UN-run open courses focusing specifically on OSINT in terrorist investigations and cyber threat understanding (modules on terrorist presence online, etc.)

Free OSINT Events

Intelligence and Criminal/Threat Investigation Related Learning

Investigative and Intelligence Fundamentals

  • Basel LEARN OSINT Course: Teaches OSINT investigation through real case scenarios (e.g., tracking crimes using open data).

While not always certificate-granting, these case-based courses are highly relevant for investigative roles and improve practical research skills.

Cybersecurity Courses That Support Investigative Skills

While not exclusively investigations, these help you understand threat landscapes, networks, and digital traces key for modern investigative work:

These cover threat models, secure systems, incident response basics and are often free to audit (with optional paid certificates).

Hands-On Practice and CTF (Capture The Flag) Platforms

Practical experience matters a lot. CTF platforms emulate real digital investigation and security scenarios and are valued by employers.

Beginner-Friendly CTF Platforms

1. TryHackMe (Free Tier): Hands-on cybersecurity training with guided labs and challenges; great for practical cybersecurity and incident response skills.

2. picoCTF (Carnegie Mellon): Free capture-the-flag cybersecurity game designed for learners; includes a variety of practical challenges.

3. CTFlearn (via ctfsites list): Community platform with varied CTF challenges across difficulty levels.

4. Ctf-Sites and Hackerverse: Catalogs of many ongoing CTF challenges you can join to get real competition experience.

5. OverTheWire and Bandit WarGame: Classic wargame style CTF challenges which build core skills in security and investigation techniques.

CTFs build practical problem solving, digital forensics, cryptography, web security, reverse engineering and OSINT skills often valued on resumes and in interviews.

Supplementary Resources for Investigation Practice

Open Learning Labs and Challenges

  • Cyber Security Jobs & Tabcode lists of free platforms curated collections of tools and environments to practice real scenarios, including forensic tasks.

CTF and Forensics Guides

How to Use These to Boost Your Career

  • Add certificates (from Alison, Coursera, etc.) to LinkedIn/Resume.
  • Document CTF achievements and flags solved in portfolios.
  • Share completed project reports or OSINT case studies on GitHub.
  • Participate in community events and forums (CTFtime, TryHackMe, Reddit) for networking.

 

Recommended Progression Path

1. Start with fundamentals: OSINT intro + cybersecurity basics.

2. Practice real skills: TryHackMe, picoCTF, OverTheWire.

3. Build a portfolio: Document investigations, write reports, solve CTFs.

4. Target specialised courses: Counter-terror OSINT from UNOCT or deeper forensic modules.

Investigative Career Paths and Specializations

Careers in investigation continue to expand as investigative skills are utilized in more capacities in both the public and private sectors.

It’s important to note that career paths will often overlap. The skills law enforcement may utilize to investigate financial crime can also be used to help companies monitor for fraud and protect against that risk. Below are some examples of industries and specialties that utilize investigative skills.

Corporate Intelligence and Risk Management

If you have an interest in corporate intelligence and loss prevention or risk management, you can pursue many different career paths. Corporate intelligence and investigative skills are in demand as more companies look to build out in-house intelligence and investigation capabilities to manage risk and regulatory requirements.

Companies may hire staff or contract Investigators to handle intelligence and investigations; however, companies that don’t have the ability to conduct internal investigations will often look to outsource those needs. Whether it’s due diligence, third-party risk/reputation management, fraud/misconduct investigations, or compliance support, businesses will need to hire external investigatory support, which creates consulting opportunities for investigators.

Roles in corporate intelligence and risk management include:

  • Corporate/Business Intelligence Analyst
  • Threat Intelligence Analyst
  • Corporate Loss Prevention Specialist
  • Corporate Investigator
  • Risk Intelligence Analyst
  • Strategic Intelligence Analyst
  • Corporate Fraud Investigator
  • Brand Protection Analyst
  • Due Diligence Analyst
  • Third-Party Risk Analyst

Useful certifications and training:

Criminal Investigations / Law Enforcement

Law enforcement is one of the more traditional industries for investigators, and physical crime remains a significant concern for communities. However, digital technology has created new avenues for criminal activity, increasing both the scale and speed at which crime can occur without regard to physical distance or borders. According to the FBI’s 2024 Internet Crime Report, internet crimes resulted in losses of $16 billion, a 33% increase from 2023.

That means criminal and law enforcement investigators must now look for both physical and digital evidence to solve crimes and bring perpetrators to justice. This expands the opportunities for investigators in this field, including roles focused on one area of crime, such as homicide, narcotics, or organized crime, as well as roles for investigators who focus on digital or physical investigative practices.

Roles in criminal and law enforcement investigations include:

  • Forensic Scientist
  • Criminal Investigator
  • Digital Forensics Investigator
  • Cybercrime Investigator
  • Homicide Investigator
  • Narcotics Investigator
  • Law Enforcement Intelligence Analyst
  • Behavioral Analyst
  • Organized Crime Investigator

Useful certifications and training:

Financial Crime and AML Investigations

The FTC received over 2.6 million fraud reports in 2024 with reported losses totaling more than $12.5 billion. That’s 25% higher than the reported losses in 2023. This number only represents fraud that was reported to the FTC. Investigative professionals are needed now more than ever to help prevent and detect financial crime.

Businesses like financial institutions, fintech firms, cryptocurrency exchanges, and private companies all need investigators to perform due diligence, monitor transactions, monitoring, look into patterns of suspicious activity, and follow the requirements for regulations like KYC, AML, and CTF. Companies and financial institutions need professionals with investigative skills to conduct forensic investigations when fraud does occur.

Roles in financial crime and AML investigations include:

  • Fraud Investigator/Analyst
  • Fraud Intelligence Specialist
  • KYC Analyst
  • Financial Intelligence Investigator
  • AML Analyst
  • Financial Crimes Analyst
  • Transaction Monitoring Analyst
  • Investigations Analyst

Useful certifications and training:

National Security and Geopolitical Intelligence

Global tensions are higher than they have been in decades between multiple countries. Private companies, federal and local governments, and defense organizations are relying on intelligence professionals to predict threats and be prepared before things escalate to wars or international standoffs. Cyber attacks on private businesses and governments occur daily, and national and global economies can shift based off of rumors or news that spreads faster than ever.

Intelligence investigators gather information from public records, intercepted communications, satellite imagery, social media, crowdsourcing, and more. They analyze this information and create actionable intelligence from the data and report it to key decision makers.

Roles in national security and geopolitical intelligence include:

  • Intelligence Analyst
  • Strategic Intelligence Researcher
  • OSINT Specialist
  • GEOINT Analyst
  • Geopolitical Risk Analyst
  • Defense Intelligence Analyst
  • Strategic Threat Analyst
  • SIGINT Analyst
  • HUMINIT Analyst

Useful certifications and training:

  • CDASA (Certified Defense All-Source Analyst) – This certification can be used across all types of defense intelligence work environments.
  • OSINT certifications – OSINT certifications are recommended if you’ll be working in an analyst role that handles open-source collection.
  • Security clearance – Helpful and likely more important than any civilian credentials you can obtain if working in a government role.
  • Certificate of Intelligence Practice – An entry-level certification that goes over the fundamentals of OSINT and intelligence analysis skills.
  • Intelligence Analysis and Assessment Techniques – Will teach you how to systematically evaluate information, identify patterns and produce actionable conclusions from any data you are given.
  • Critical Thinking and Structured Analysis – Course that focuses on critical thinking skills used for analytical reasoning and structured analysis.
  • ISA’s Professional Development & Training – The Intelligence & Security Associates, LLC has put out a great series of 3 courses that include intelligence community basics, OSINT training, analytics skills, critical thinking skills, and national security policy.
  • Structured Analytic Techniques – These are techniques that can be used to methodically evaluate information you are given, find patterns, and reduce cognitive biases to make better and defensible decisions based off of your analysis.
  • Structured Analytic Techniques: Basic Diagnostic Techniques – This set of structured analytic techniques will help you understand how to frame your questions, find assumptions, organize your evidence, and produce sound analytical judgments.
Investigative Journalism and Research

Investigative reporting digs beneath the surface to reveal the truth. Investigative journalists research their information using observation, interviews, data analysis, digital forensics and more.

Evidence is collected and confirmed. Data is analyzed and used to recognize patterns and tell a story. Great narratives are constructed using supporting documentation and logic. Investigative journalists can research governments, financial markets, online statements, and anything in between. Dedication to the process is what’s important, so stick to the facts and find the truth.

Roles in investigative journalism and research include:

  • Investigative Reporter
  • Investigative Journalist
  • Data Journalist
  • Research Analyst
  • Fact-Checker
  • Open-Source Researcher

Useful certifications and training:

Cyber Threat Intelligence

Cyber Threat Investigators can work for private companies, cybersecurity businesses, and even law enforcement. Private companies have a lot of sensitive information floating around on computers and the internet, whether they realize it or not. With more information accessible online comes more opportunity for threat actors to exploit vulnerabilities.

Cyber threat actors are constantly changing tactics to try and gain access to their target’s systems and organizations. Threats can come from government cyber programs, organized crime, or simple insiders looking to take advantage. Either way, companies have to be monitoring these dangers beforehand.

Cyber threat investigators help companies stay one step ahead of threats with proactive monitoring and research. Cyber threat intelligence can also be used after a breach to figure out what occurred. This can be done by performing analysis on systems that were affected to understand how the breach occurred. Determine what assets were affected, stopping the attack from causing more damage, and learn how to prevent future attacks.

Roles in cyber threat intelligence include:

  • Information Security/Cyber Analyst
  • Threat Intelligence Analyst
  • Insider Threat Analyst
  • Cyber Threat Intelligence Analyst
  • SOC Intelligence Analyst
  • Threat Hunter
  • Digital Threat Analyst
  • Incident Response Analyst

Useful certifications and training:

Networking and Professional Associations

These professional associations and networking groups help investigators build strong networks of their peers and stay on top of the latest investigative techniques and technologies.

Honing Your Skills and Becoming the Best Investigator You Can Be

Great investigators never stop learning. As threats, platforms, and technologies evolve, so must investigative techniques. The best professionals actively practice their craft: they sharpen OSINT skills, explore digital forensics, study adversary behavior, and learn how criminal and extremist networks operate online and offline. They build portfolios that show how they think, not just what they know and case write-ups, investigative workflows, and ethical decision-making matter just as much as technical skills.

Becoming a top-tier investigator also means developing judgment. This includes knowing when information is reliable, when assumptions are dangerous, and when to slow down. The strongest investigators collaborate well, challenge their own biases, and stay grounded in evidence. Over time, skill becomes instinct through deliberate practice, reflection, and exposure to real-world problems. Investigation isn’t a destination; it’s a profession defined by continual growth, integrity, and attention to detail.