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  1. Cybersecurity
  2. Penetration Testing
Penetration testing for US businesses

Penetration testing: external, internal, web application, wireless, and social engineering.

A penetration test simulates a real-world attacker against your environment to find what they would find, before they find it. We deliver scoped tests against your external attack surface, internal network, web applications, wireless, and human attack surface. Every engagement produces a written report with verified findings, proof-of-concept evidence, and a prioritized remediation plan your team can execute, plus the attestation letter your customers, auditors, and insurers ask for.

Book a pen-test scoping callSee test types
Penetration tester at a multi-monitor workstation simulating real-world attacker techniques
  • 5Pen-test scopes
  • PTESMethodology aligned
  • 2 wksTypical duration
  • VerifiedFindings only
Five penetration-test scopes

Five pen-test types, each answering a different question.

Pen testing is not one engagement. Each scope answers a specific question about your security posture, and most mature programs run more than one scope annually.

External penetration testing

Tests your internet-facing attack surface as an unauthenticated external attacker would see it. Domain reconnaissance, public-IP scanning, exposed-service exploitation, web-application surface testing. Answers: what could anyone on the internet do to us?

Internal penetration testing

Tests your internal network as an attacker who has already breached the perimeter, the assumed-breach model. Privilege escalation, lateral movement, Active Directory exploitation, sensitive-data access. Answers: how far could a breach spread before detection?

Web application penetration testing

Tests a specific web application against the OWASP Top 10 plus business-logic flaws. Authentication, authorization, session management, input validation, deserialization, and business-logic abuse. Answers: how would an attacker compromise this specific application?

Wireless penetration testing

Tests your WiFi and Bluetooth attack surface. Rogue access points, WPA exploitation, captive portal bypass, guest-network segregation, BLE device exposure. Answers: how would an attacker near your premises compromise the wireless layer?

Social engineering and phishing

Tests the human attack surface. Phishing campaigns, vishing, and pretexting, measured by click rate and credential-disclosure rate. Answers: how resilient is your organization against the vector that starts most real US breaches?

Why businesses choose us for pen testing

Four reasons IT leaders engage GR for penetration testing.

Methodology-aligned, not script-aligned

Testing aligned to PTES, OWASP, and NIST SP 800-115 methodologies. Manual testing layered on top of automated tooling, with every reported finding verified by exploitation evidence rather than auto-generated from scanner output.

Reports written for two audiences

An executive summary for leadership: business risk, severity heat map, recommended priorities. A technical report for engineers: exploitation steps, evidence, remediation guidance per finding. Both rigorous, both readable, and both usable as compliance evidence.

Remediation support included

Many pen-test firms hand over a report and disappear. We include remediation-support hours: clarification calls, technical guidance on fixes, and a re-test of remediated findings within the engagement window so your final report shows closure, not just discovery.

Built for the people who will read it

SOC 2 auditors, PCI assessors, cyber insurance underwriters, and enterprise procurement teams each want specific things from a pen-test report. We write findings, attestation letters, and control mappings so the report answers their questions the first time, without a follow-up cycle.

When to penetration-test

Six triggers for a penetration test.

Annual security baseline

SOC 2 and NIST-aligned security programs treat an annual penetration test as a baseline control, and auditors ask for the most recent report.

Pre-launch web application

Before launching a customer-facing web app or API, test the application before attackers get their turn.

Post-major-change validation

After a cloud migration, network redesign, or major infrastructure change, validate that the new posture holds.

Compliance-mandated testing

PCI DSS requires periodic penetration testing for card-data environments, and CMMC/NIST 800-171 programs expect testing evidence.

Post-incident

After an incident or near-miss, a pen test validates the closure of the exploited gap and finds the adjacent ones.

Customer or insurer requirement

Enterprise customers and cyber insurance underwriters increasingly require recent pen-test evidence as part of due diligence.

Penetration test vs adjacent assessments

Three security assessment types compared.

Scope
Penetration testingDefined, scoped
Vulnerability assessmentBroad
Red teamOpen, adversarial
Methodology
Penetration testingManual + tooling
Vulnerability assessmentAutomated
Red teamReal-attacker emulation
Exploitation attempts
Penetration testingYes, scoped
Vulnerability assessmentNo
Red teamYes, full chain
Duration
Penetration testing1-3 weeks
Vulnerability assessment1-3 days
Red team4-12 weeks
False-positive rate
Penetration testingLow (verified)
Vulnerability assessmentHigh
Red teamVery low
Output
Penetration testingVerified findings
Vulnerability assessmentCVE list
Red teamAttack narrative
Relative cost
Penetration testingMid
Vulnerability assessmentLower
Red teamHighest
Best for
Penetration testingAnnual baseline, pre-launch
Vulnerability assessmentContinuous hygiene
Red teamMature program stress-test
Feature
Penetration testing
Vulnerability assessment
Red team
Scope
Defined, scopedBroadOpen, adversarial
Methodology
Manual + toolingAutomatedReal-attacker emulation
Exploitation attempts
Yes, scopedNoYes, full chain
Duration
1-3 weeks1-3 days4-12 weeks
False-positive rate
Low (verified)HighVery low
Output
Verified findingsCVE listAttack narrative
Relative cost
MidLowerHighest
Best for
Annual baseline, pre-launchContinuous hygieneMature program stress-test
How a pen-test engagement runs

From scoping call to remediation re-test, five stages.

Standard PTES-aligned methodology: scoping, reconnaissance, exploitation, post-exploitation, reporting, and a remediation re-test.
  1. 1

    Scoping and rules of engagement

    2-5 days

    Define scope: which targets, which exclusions, timing windows, the communication plan, and written rules of engagement covering what is in and out of bounds. Output: a signed scope and ROE document plus an authorization letter.

  2. 2

    Reconnaissance and discovery

    2-3 days

    Passive and active reconnaissance against in-scope targets. Asset mapping, technology fingerprinting, vulnerability surface enumeration. Output: a target intelligence dossier.

  3. 3

    Exploitation and post-exploitation

    5-10 days

    Active exploitation of identified vulnerabilities within the rules of engagement. Privilege escalation, lateral movement, sensitive-data identification, with no real persistence implants left behind. Daily status updates to your security contact.

  4. 4

    Reporting and debrief

    3-5 days

    A written report with executive and technical sections, a debrief presentation, and remediation-support hours to help your team work through the fixes.

  5. 5

    Remediation re-test

    Within 60 days

    Re-test of remediated findings within 60 days, then a final report with updated status per finding, the version you hand to auditors, customers, and insurers.

Penetration testing FAQ

What buyers ask before scoping a pen test.

Vulnerability scanning is automated identification of known vulnerabilities. Penetration testing is manual exploitation of those and other weaknesses to verify which are actually exploitable and what the impact would be. Scanning produces a list; pen testing produces a verified attack narrative. Auditors, enterprise customers, and insurers know the difference, and a scan report labeled as a pen test gets rejected.

Risk is managed through scope and rules of engagement. Most pen tests run against production with low risk; high-risk activities such as denial-of-service simulation or destructive exploitation are either out of scope, run against staging, or run during agreed maintenance windows. We confirm your risk tolerance during scoping, in writing.

External: 5-10 days. Internal: 5-10 days. Web application: 5-15 days depending on complexity. Wireless: 2-3 days. Social engineering: 5-10 days. Total elapsed time including scoping, testing, reporting, and re-test is typically 3-4 weeks. If a customer deadline is driving the engagement, tell us; reporting can be sequenced to hit it.

The report is written to serve as evidence in each of those contexts. SOC 2 auditors look for testing and remediation of identified issues. PCI DSS has explicit penetration testing requirements for card-data environments. A HIPAA risk analysis is strengthened by technical testing evidence. The report includes a control-mapping appendix for the frameworks that apply to you, and your auditor or assessor owns the final interpretation.

Usually three things: evidence that a test was performed recently by an independent party, the severity summary, and evidence that critical and high findings were remediated. The final report after re-test covers all three, and we can produce a summary attestation letter that answers the questionnaire without disclosing your full technical findings to a third party.

Yes, as a separate engagement model. Red teaming is open-scope, adversarial, multi-week emulation of a real attacker, including social engineering and lateral movement toward crown-jewel assets. It is more expensive and more impactful, and it is only appropriate for mature security programs with an established detection capability to test against.

Annually at minimum for a baseline. Twice yearly if you have high change frequency or operate in a heavily regulated sector. Pre-launch testing for new web applications, and post-incident testing after a near-miss. PCI DSS environments also require testing after significant changes to the card-data environment.

Immediate notification to your security contact with technical detail and a recommended mitigation. We do not sit on critical findings until the final report. Remediation can start while the rest of the test continues, and the re-test window covers it.

Testing is performed by our security engineers under the signed rules of engagement, delivered remotely except where a scope such as wireless requires presence, which we arrange per engagement. Tester profiles and industry certifications can be shared during scoping if your compliance framework or procurement process requires named credentials.

Findings are handled under NDA, reports are encrypted in transit and at rest, raw exploitation evidence is purged after the retention window you set, and disclosure is to your named contacts only. If you have specific data-handling requirements, for example for regulated data, they go into the rules of engagement.

Each engagement is scoped and quoted individually, driven by the number of scopes, target counts, and application complexity. A 60-minute scoping call produces a written scope and a custom quote. We will also tell you when a vulnerability assessment covers your actual need at lower cost, because selling you the wrong engagement costs us the relationship.
Related security services

Services that pair with penetration testing.

Vulnerability assessment

Broader, automated vulnerability discovery, often run continuously alongside annual pen testing.

Learn more

Microsoft Sentinel SOC

The detection capability that offensive testing validates and sharpens.

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API security assessment

Focused authorization testing for the API estate behind your applications.

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Pen testing, ready when you are

Book a scoping call and get a written scope within a week.

A 60-minute scoping call to identify which tests fit your need, agree the rules of engagement, and produce a written scope. Test execution starts within 2 weeks of scope sign-off.

Book a scoping callSee cybersecurity services

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