Cyber
Security
Engineer

Security lives on the network. You must deeply understand how data moves. Study the OSI & TCP/IP models: all 7 layers and what happens at each. Learn IP addressing: subnetting, CIDR, NAT, private vs public IPs. Understand core protocols: DNS, DHCP, HTTP/S, FTP, SSH, SMTP. Study routing & switching: VLANs, ARP, routing tables. Learn Wireshark to inspect packets live. Without networking, you cannot understand attacks.

90% of security tools run on Linux. Master it. Learn Kali Linux — the standard security distribution. Understand the filesystem hierarchy, permissions, and user management. Get fluent in the command line: grep, awk, sed, netstat, ps, find, chmod, cron. Learn Bash scripting to automate tasks and write simple exploits. Set up a home lab with VirtualBox or VMware. Practice daily — security engineers live in terminals.

Every security decision flows from first principles. Master the CIA Triad: Confidentiality, Integrity, Availability. Understand cryptography: symmetric (AES), asymmetric (RSA, ECC), hashing (SHA-256, MD5), digital signatures. Study PKI: certificates, CAs, TLS/SSL handshake. Learn authentication models: MFA, OAuth, SAML, zero-trust. Study common vulnerabilities: OWASP Top 10, CVE system, attack surface analysis. These are the building blocks every certification tests.

Ethical hacking means thinking like an attacker to defend systems. Master the pentest methodology: Reconnaissance → Scanning → Exploitation → Post-exploitation → Reporting. Learn Nmap for network scanning and service enumeration. Use Metasploit Framework to exploit known CVEs. Master Burp Suite for web application attacks: SQLi, XSS, IDOR, SSRF. Practice on HackTheBox & TryHackMe legally. Learn privilege escalation on Linux & Windows. This is the most exciting and employable skill set.

Most entry-level jobs are in Security Operations Centers. Learn SOC workflows: log analysis, alert triage, escalation. Master SIEM tools: Splunk and Microsoft Sentinel — write detection rules, parse logs, build dashboards. Study incident response: the IR lifecycle (Prepare → Identify → Contain → Eradicate → Recover → Lessons Learned). Learn digital forensics basics: disk imaging, memory dumps, timeline analysis. Understand threat intelligence frameworks: MITRE ATT&CK, Cyber Kill Chain, Diamond Model.

The majority of breaches in 2026 are cloud misconfigurations. Learn AWS security fundamentals: IAM roles, policies, least privilege, S3 bucket security, VPC security groups, CloudTrail logging. Understand cloud attack patterns: IAM privilege escalation, metadata service exploitation (SSRF), public S3 buckets, exposed keys. Study cloud security tools: AWS GuardDuty, Security Hub, CloudWatch. Learn Terraform to provision secure infrastructure as code. Practice with CloudGoat (intentionally vulnerable AWS) and flaws.cloud.

Modern engineering teams ship daily — security must be embedded in the pipeline. Learn SAST & DAST: static code analysis with Snyk, SonarQube; dynamic scanning with OWASP ZAP. Master Docker security: image scanning, non-root containers, secrets management. Study Kubernetes security: RBAC, network policies, pod security standards, kube-bench. Build secure CI/CD pipelines with GitHub Actions: dependency scanning, secret detection (GitLeaks, truffleHog). Understand secrets management: HashiCorp Vault, AWS Secrets Manager.

Malware analysts are among the highest-paid specialists. Learn static analysis: examine malware without executing — strings, PE headers, imports, YARA rules with tools like PEstudio, Detect-It-Easy. Learn dynamic analysis: run malware in sandboxes (Cuckoo, AnyRun, VirusTotal) and observe behavior. Study reverse engineering basics: x86/x64 assembly, using Ghidra (free) and IDA Pro. Understand common malware families: ransomware, RATs, rootkits, botnets. Practice on MalwareBazaar samples in isolated VMs.

In 2026, red teaming and AI threats are the frontier. Learn advanced red teaming: C2 frameworks (Cobalt Strike, Sliver, Havoc), Active Directory attacks (Kerberoasting, Pass-the-Hash, BloodHound), lateral movement. Study AI security: prompt injection attacks on LLMs, adversarial ML, securing AI APIs, model extraction threats. Learn threat intelligence: OSINT techniques, threat actor profiling, indicators of compromise (IOCs), intelligence platforms (MISP, OpenCTI). Study GRC: ISO 27001, NIST CSF, SOC 2, GDPR compliance basics.

Security interviews test three things: technical knowledge (explain how a SQL injection works, describe the TLS handshake, what happens in a Pass-the-Hash attack), hands-on skills (solve a packet capture challenge, find a vulnerability in a given web app), and scenario-based thinking (walk me through how you'd respond to a ransomware attack). Build your portfolio: complete 3 TryHackMe learning paths, solve 10+ HackTheBox machines, submit at least one valid bug bounty report on HackerOne or Bugcrowd, and write technical writeups on each CTF. Host writeups on a personal blog or GitHub.