Senior Offensive Security Engineer

ecolab; United States; On-site; USD 150,000 - 210,000; Full time

Job summary

Ecolab seeks a Senior Offensive Security Engineer for Commercial Products to perform hands-on security testing across web, mobile, APIs, cloud, IoT, and embedded devices. You will plan assessments, identify exploitable paths, and mentor engineers while staying deeply involved in day-to-day testing, analysis, and remediation validation.

You will partner with product security and engineering teams to translate findings into practical remediation and risk-based priorities, supporting secure SDLC

Qualifications

• Bachelor's degree in a technology field.
• 5+ years with hands-on cybersecurity and offensive security.
• Experience testing web, mobile, APIs, cloud, and IoT products.
• Experience mentoring engineers and reporting findings.

Responsibilities

• Perform hands-on offensive security testing across commercial products.
• Plan, scope, and execute security assessments for identified attack paths.
• Mentor engineers and contribute to testing methodologies and reporting.

Skills

Offensive security

Penetration testing

Security testing

Threat modeling

Mentoring

Education

Bachelor's Degree in Cybersecurity / CS / IT / Engineering

Tools

Burp Suite

OWASP ZAP

Nmap

GitHub Advanced Security

Snyk

Wiz

Horizon3 NodeZero

Job description

The Senior Offensive Security Engineer, Commercial Products will perform hands-on offensive security testing across Ecolab's commercial digital product portfolio. This role will focus on technical testing of customer-facing commercial products, including web and mobile applications, APIs, cloud services, IoT solutions, PLC/IPC-connected equipment, embedded or field-deployed devices, and related product integrations. The Senior Offensive Security Engineer, Commercial Products will actively perform security testing for most of their time while supporting offensive security engagements, mentoring engineers as needed, and helping improve engagement scope, testing methods, reporting quality, remediation validation, and risk-based prioritization. This role will partner closely with product security, engineering, architecture, cloud, IoT, legal/compliance, and business stakeholders to identify vulnerabilities before they are discovered externally and to help improve the security maturity of Ecolab's commercial offerings.

What you will do:

• Perform hands-on offensive security testing across Ecolab commercial products, including web applications, mobile applications, APIs, cloud services, IoT platforms, PLC/IPC-connected equipment, embedded devices, and product integrations.
• Plan, scope, and execute technical security assessments focused on identifying exploitable vulnerabilities, attack paths, insecure configurations, weak access controls, exposed secrets, insecure APIs, cloud misconfigurations, and product-specific security gaps.
• Support offensive security engagements and mentor engineers as needed while remaining highly hands-on in day-to-day testing, analysis, documentation, and remediation validation activities.
• Contribute to repeatable red team and offensive testing methods, engagement rules, reporting standards, evidence expectations, and risk-rating approaches appropriate for commercial digital products.
• Partner with product security, application engineering, cloud engineering, IoT engineering, architecture, and business teams to translate testing results into clear remediation actions and risk-based priorities.
• Conduct safe and authorized technical testing of IoT and industrially connected equipment, including physical access testing of product hardware, field devices, PLC/IPC interfaces, device communications, and related technology components where appropriate.
• Use commercial and enterprise-approved security tools such as Snyk, Wiz, Burp Suite, OWASP ZAP, GitHub Advanced Security, Nmap, Horizon3 NodeZero, DAST tooling, and related technologies to identify, validate, and document security issues.
• Validate vulnerabilities discovered through internal testing, automated scanning, third-party penetration testing, customer inquiries, bug reports, and product security reviews.
• Prepare clear, actionable reports that explain vulnerability impact, exploitability, business context, affected assets, remediation guidance, compensating controls, and validation results.
• Present technical findings to engineering teams and non-technical stakeholders at all levels of the organization, communicating risk, business impact, and practical remediation paths.
• Support product threat modeling, secure architecture reviews, application security reviews, cloud security assessments, and security design discussions based on offensive testing insights.
• Support improvements to Ecolab's vulnerability management, secure SDLC, DevSecOps, and product security governance practices by identifying recurring weakness patterns and practical control improvements.
• Support coordination with third-party penetration testing providers when appropriate, including scope development, test readiness, evidence review, finding validation, and remediation tracking.
• Maintain awareness of emerging offensive security techniques, AI-enabled attack methods, application security risks, cloud security trends, IoT attack vectors, and relevant industry standards.
• Act as an advocate and champion for practical, risk-based product security across Ecolab's commercial digital product teams.

Minimum Qualifications:

• Bachelor's Degree in Cybersecurity, Computer Science, Information Technology, Engineering, or related technology-driven field.
• 5+ years of hands-on experience in cybersecurity, application security, offensive security, penetration testing, product security, cloud security, IoT security, software engineering, or related technical field.
• Demonstrated hands-on experience performing authorized technical security testing of web applications, mobile applications, APIs, cloud services, and/or IoT-connected products.
• Experience supporting offensive security engagements, vulnerability assessments, penetration tests, remediation validation, and technical security reporting.
• Experience supporting technical workstreams, mentoring engineers, or coordinating testing activities while remaining directly involved in hands-on testing and analysis. Experience wi