What is a penetration tester?
A penetration tester (pen tester) is a security professional who evaluates an organization's defenses by simulating authorized cyberattacks, identifying and chaining weaknesses together to demonstrate real-world impact.
The engagement lifecycle typically begins with comprehensive reconnaissance, leveraging open-source intelligence (OSINT) and targeted enumeration to map the exposed attack surface. From there, testers identify and validate vulnerabilities through a combination of systematic scanning and intensive manual analysis, verifying which flaws are genuinely exploitable. Once weaknesses are confirmed, testers shift to offensive operations: exploiting vulnerabilities to establish initial footholds, escalate privileges, and maintain persistent access.
But technical execution is only half the job. Pen testers must document findings with clear, actionable, evidence-based reporting that translates technical risk into a business context for executives while providing precise remediation steps for developers. The engagement concludes with debriefing sessions, knowledge transfer to defensive teams, and retesting to verify that the fixes are fully effective.
Organizational architectures differ significantly, so no two assessments are identical. This variability demands constant learning: New exploits, evolving tools, and shifting technologies keep the work highly engaging. Once you gain experience as a pen tester, you can transition into advanced roles like red teaming or vulnerability research.
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How penetration testing roles have evolved
The traditional cyber security pen testing model focused on network perimeters and unpatched operating systems. Today, modern practitioners are not just running vulnerability scanners; they’re highly skilled experts who emulate adversary behavior to validate security posture across complex hybrid and cloud environments.
The most profound shift is the evolution from basic network and web application testing to understanding cloud control planes. In cloud-native ecosystems, the objective is no longer just about shelling a server; it’s about exploiting identity, navigating overly broad permissions, and weaponizing minor configuration drift.
The testing cadence has also fundamentally changed. Organizations are shifting from annual assessments to continuous security validation to keep up with risk. And because cloud environments and attack surfaces change with every automated release, modern pen tests must now integrate directly into DevSecOps workflows. This means testing automated CI/CD pipelines and analyzing infrastructure-as-code (IaC) templates to catch privilege escalation risks and misconfigurations long before they’re deployed into production.
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A penetration tester is an authorized security professional who simulates real-world attacks against systems, networks, and applications to identify vulnerabilities before malicious actors can exploit them.
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Core skills and methodologies for pen testers
Effective penetration testing combines foundational IT administration with specialized offensive operational knowledge.
Operating system internals
Pen testers must navigate major Linux distributions and Windows infrastructure fluently. This requires a deep understanding of file systems, permission models, and background processes. You can’t reliably escalate privileges or establish persistence without in-depth knowledge of how an operating system handles access control, Active Directory structures, and service architectures.
Networking fundamentals
Understanding TCP/IP, DNS, and routing allows you to navigate environments and identify misconfigurations. Beyond traditional networking, modern enterprise architectures require testers to dissect complex web traffic and API communication, which demands familiarity with protocols such as HTTP/2, WebSocket, and gRPC.
Web application security
Pen testers must have a strong understanding of application logic and the OWASP Top 10 vulnerabilities. Identifying injection flaws, broken access control, session mishandling, and authentication bypasses is foundational to demonstrating real-world risk.
Cryptography
Pen testers must understand the mechanics of public key cryptography and secure key storage. This knowledge comes into play when you assess how an organization implements and enforces encryption at rest and in transit across its digital assets.
Pen test–specific skills
Threat modeling: Pen testers anticipate adversary behavior and map potential attack vectors against an architecture before executing a test.
Reconnaissance and enumeration: Systematic reconnaissance and enumeration let penetration testers map the attack surface, uncover shadow IT, and identify potential entry points.
Exploitation and post-exploitation: After initial access, pen testers execute privilege escalation, establish persistence mechanisms, and simulate secure data exfiltration.
Pen testing report writing: Pen testers translate technical vulnerabilities into business risk by writing clear impact summaries for executives. Providing exact fix actions for developers closes the loop.
Developing custom tools and scripting automation: Practitioners use languages such as Python, Bash, PowerShell, Perl, and Ruby to build custom exploit chains that bypass specific security controls. Scripting is also heavily used to automate repetitive tasks across scanning, reconnaissance, enumeration, and reporting workflows.
Testing frameworks: Pen test teams rely on established operational frameworks such as the Penetration Testing Execution Standard (PTES) and the Open Source Security Testing Methodology Manual (OSSTMM). They also map findings against industry-standard risk classifications using the OWASP Web Top 10 and use the MITRE ATT&CK Cloud Matrix to emulate specific adversary behavior.
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What does cloud-focused pen testing involve?
Moving to cloud-native architectures changes your technical focus. Here’s a closer look:
Prioritizing the control plane
Traditional offensive security heavily prioritized the data plane and involved exploiting application logic, compromising underlying operating systems, and extracting database contents directly from servers. In cloud-native environments, the objective shifts.
Modern adversaries primarily target the control plane by hunting for overly permissive IAM roles, querying instance metadata service (IMDS) endpoints for temporary credentials after SSRF or code execution, and locating leaked API keys in repositories.
By compromising the control plane, testers can often bypass data plane restrictions entirely, gaining administrative control over the entire environment.
Following the rules of engagement
Because cloud providers own the underlying hardware and hypervisor layers, they set the legal boundaries of offensive security assessments. Testers cannot launch infrastructure-level attacks without understanding these provider-specific rules of engagement (RoE).
While major providers like AWS no longer require prior approval for most authorized security assessments against customer-owned resources, activities like distributed denial of service (DDoS) simulations, DNS zone walking, and protocol-level flooding remain restricted or require explicit coordination.
Emphasizing regulatory compliance
Established compliance frameworks, specifically PCI DSS (which explicitly requires annual penetration testing), SOC 2, and ISO 27001, drive rigorous, recurring security validations across cloud environments. By clearly documenting how a breached IAM policy violates SOC 2 trust services criteria or jeopardizes a PCI DSS cardholder data environment, testers translate technical flaws into actionable business risk.
What is continuous pen testing? A cloud security perspective
Continuous penetration testing is an always-on, adversarial security testing approach that persistently discovers, exploits, and validates vulnerabilities across your environment rather than testing at a single point in time.
Read moreHow can a cloud-focused pen tester specialize?
Container and Kubernetes security
Specializing in container and Kubernetes security requires moving beyond general Linux internals to understand how workloads are isolated, networked, and managed at scale. Pen testers target these environments by attempting to break out of containers, exploiting vulnerable container runtimes or kernel flaws to access the underlying host node.
From there, the objective shifts to exploiting misconfigured pods, such as those running with excessive privileges, mounted host file systems, or exposed service account tokens. Testers then use these footholds to execute lateral movement within Kubernetes clusters, systematically abusing weak role-based access control (RBAC) policies and unprotected internal API server endpoints to compromise the entire orchestration layer.
CI/CD pipeline exploitation
Rather than attacking production environments directly, specialized penetration testers frequently target the software supply chain. Automated deployment systems effectively hold administrative power over the cloud environment, making CI/CD pipelines highly lucrative targets.
Exploiting these systems begins with identifying exposed secrets—such as API tokens, cloud credential files, or database passwords—leaked in source code repositories, CI/CD environment variables, or build logs. Testers also hunt for insecure build agents, such as overly privileged GitHub Actions runners or unpatched Jenkins servers, which provide an execution environment inside the organization's trust boundary.
By leveraging these vulnerabilities and proving a lack of code signing in deployment pipelines, pen testers demonstrate how adversaries can inject malicious IaC changes or backdoors that bypass traditional runtime defenses entirely.
Identity and access management
Specializing in IAM requires strong analytical skills to map how users, services, and cloud resources interact across distributed environments.
Testers identify toxic combinations of risks where isolated permissions and misconfigurations combine to create exploitable attack paths. An S3 bucket with limited public access might appear to be a low-severity finding until a tester proves it can be paired with an overly broad resource policy to extract sensitive data.
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Which pen testing certifications should you get?
For professionals newly transitioning to offensive security, entry-level credentials such as CAP and CompTIA PenTest+ provide an essential baseline. These exams validate core methodologies, vulnerability identification, and basic tool usage. They assist candidates in meeting initial recruitment criteria, though passing them requires dedicated lab time rather than theoretical memorization.
Getting advanced, hands-on certifications are typically the turning point in a pen tester's career. The Offensive Security Certified Professional (OSCP+) certification is widely considered the industry gold standard for validating practical execution capability. Unlike theory-based, multiple-choice exams, the OSCP+ exam requires candidates to independently compromise multiple machines within a strict 24-hour window, proving actual operational competence.
After mastering foundational exploitation, practitioners often progress to the Offensive Security Experienced Penetration Tester (OSEP) certification to prove their understanding of advanced evasion and custom breach techniques.
Provider-specific certifications are another way to prove your skills. The AWS Security Specialty certification or GCP Professional Cloud Security Engineer certification proves you understand how major providers architect security controls.
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What does the penetration tester career path look like?
A junior tester role typically centers on execution, running scoped test plans, verifying automated findings, and validating established vulnerability classes. As practitioners progress to senior or lead penetration testers, their scope widens from individual technical flaws to broader application architecture and complex business logic vulnerabilities. Principal pen testers or red team leads focus on strategic simulation, designing long-term, objective-based campaigns that emulate complex threat actors to test an organization's holistic detection and response capabilities.
What’s the market outlook?
Entry-level pen testers often start their careers earning between $75,000 and $95,000 annually. Experienced testers typically earn $120,000–$160,000 or more as they step into senior roles, with cloud-focused specialists and red team leads commanding higher compensation. (These salary ranges may vary significantly based on factors like geographic location.)
As enterprise infrastructure continues to move off-premises, the industry faces a critical shortage of offensive practitioners with a deep understanding of distributed architecture. As a result, cloud-native expertise commands a substantial salary premium.
How Wiz accelerates your penetration testing career
By mapping identities, network exposures, and workload configurations into a single unified view and providing autonomous vulnerability discovery, Wiz gives practitioners a true attacker's-eye view. This perspective allows testers to quickly identify where trust boundaries break down and deeply understand how an adversary would actually navigate the architecture.
The Wiz Red Agent automates vulnerability discovery across web applications and APIs, validates exploitability with dynamically adapted attack patterns, and surfaces findings that traditional scanners miss—including OWASP API Top 10 issues, logic flaws, and authorization bypasses. For pen testers, it acts as a force multiplier: handling breadth so you can focus depth on complex, high-value attack chains.
The Wiz Red Agent is most powerful when paired with Penetration Test Findings in Wiz, which centralizes pen test results from any source into a single, browsable inventory. Track your findings with Wiz, prioritize them with the context added via the Security Graph, and map each vulnerability to the designated infrastructure owner. This dynamically added context makes it easy to understand new vulnerabilities, fast.
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