Networks & Security Engineer

Planet Group; Milwaukee (WI); On-site; USD 55,000 - 61,000; Full time

Job summary

Planet Group in Milwaukee, WI is seeking a Network Security Engineer to validate the security, reliability, and performance of industrial networking solutions. You will design and execute test strategies for Ethernet networks and identify vulnerabilities across IT/OT environments.

Collaborating with software teams and subject matter experts, you will develop automated tests, document findings, and help strengthen Rockwell Automation portfolio security and compliance.

Qualifications

• Bachelor's degree in Computer Engineering, Computer Science, or Electrical Engineering with a concentration in Computer Science.
• At least three years of professional experience in software testing, software development, or a related technical field.
• Strong understanding of computer networking fundamentals, network architectures, and communication protocols.
• Hands-on experience designing, implementing, configuring, and troubleshooting network infrastructures.
• Advanced technical expertise in complex networking solutions, IT/OT convergence.
• Experience testing Ethernet networks and designing network test environments.
• Knowledge of networking protocols such as STP, VLANs, DTP, VTP, IGMP, RIP, OSPF, EIGRP, HSRP, VRRP, ACLs, MRP.
• Familiarity with cybersecurity concepts, security testing protocols, vulnerability assessment, and PSIRT processes.
• Experience with Cisco IE switches, Rockwell Stratix switches, and network routers.
• Automation testing frameworks and test execution processes.

Responsibilities

• Participate in team planning and status meetings to establish priorities and deliverables.
• Perform functional testing using security tools to identify vulnerabilities (white-box, grey-box, black-box).
• Analyze complex technical issues, document defects and test findings, and support troubleshooting.
• Collaborate with engineers to investigate, analyze, and resolve defects and vulnerabilities.
• Develop and maintain test cases, scripts, and reusable test assets.
• Contribute to automated testing strategies and frameworks.
• Apply testing methodologies to achieve comprehensive coverage.
• Record, summarize, and communicate test results to stakeholders.

Skills

Networking fundamentals

Network design & troubleshooting

Automated testing concepts

Cybersecurity concepts

English communication

Python for test automation

Industrial networking

Education

Bachelor's degree in Computer Engineering, Computer Science, or Electrical Engineering with CS concentration

ISTQB Foundation Level

Tools

Python

Fuzzing tools

Diagnostic tools

Cisco IE switches / Rockwell Stratix switches

Job description

Job Title: Network Security Engineer

Location: Milwaukee, WI 53204

Contract length: 12 -Month Contract

Pay: $40-44.80hr

The Network Security and Functional Test Engineer is responsible for validating the functionality, performance, reliability, and security of industrial networking solutions within Rockwell Automation's product portfolio. This role focuses on designing and executing comprehensive test strategies for Ethernet networks, identifying security vulnerabilities, developing automated testing frameworks, and troubleshooting complex networking issues across IT and OT environments. The engineer collaborates closely with software developers, product teams, and subject matter experts to improve product quality, strengthen cybersecurity, and ensure compliance with evolving technical requirements and industry best practices.

• Participate in team planning and status meetings to establish priorities, clarify task assignments, and define expected deliverables.
• Perform functional testing using commercial off-the-shelf and proprietary security tools to identify vulnerabilities through white-box, grey-box, and black-box testing methodologies.
• Analyze complex technical issues, document defects and test findings, and maintain detailed records to support troubleshooting and future resolution.
• Collaborate with software developers and cross-functional teams to investigate, analyze, and resolve identified defects and security vulnerabilities.
• Develop and maintain test cases, test scripts, and reusable test assets to address evolving product requirements and system specifications.
• Contribute to the design and implementation of automated testing strategies, frameworks, and processes.
• Apply appropriate testing methodologies, tools, and techniques to achieve comprehensive functional and security test coverage.
• Continuously improve knowledge of functional testing processes, test development practices, and emerging testing technologies.
• Consult subject matter experts to evaluate technical challenges, investigate potential solutions, and support evidence-based decision-making throughout product development.
• Establish project timelines, track assigned tasks, monitor progress, and ensure deliverables are completed within established deadlines.
• Prepare and deliver informal technical presentations to small groups on specialized networking, testing, and security topics.
• Stay current with emerging networking technologies, cybersecurity trends, and IT/OT convergence best practices.
• Evaluate new technologies and products that could enhance Rockwell Automation's portfolio while continuously developing technical expertise.
• Record, analyze, and summarize test results, ensuring findings are clearly documented and communicated to relevant stakeholders.

Minimum Qualifications

• Bachelor's degree in Computer Engineering, Computer Science, or Electrical Engineering with a concentration in Computer Science.
• At least three years of professional experience in software testing, software development, or a related technical field.
• Strong understanding of computer networking fundamentals, network architectures, and communication protocols.
• Hands-on experience designing, implementing, configuring, and troubleshooting network infrastructures.
• Advanced technical expertise in complex networking solutions, implementation strategies, and IT/OT convergence.
• Practical experience testing Ethernet networks and designing network test environments.
• Knowledge of networking protocols and technologies, including STP, VLANs, DTP, VTP, IGMP, RIP, OSPF, EIGRP, HSRP, VRRP, Flex Links, ACLs, DLR, PRP, HSR, and MRP.
• Familiarity with cybersecurity concepts, security testing protocols, fuzzing tools, vulnerability assessment, and Product Security Incident Response Team (PSIRT) processes.
• Experience working with Cisco Industrial Ethernet (IE) switches, Rockwell Automation Stratix switches, and network routers.
• Hands-on experience with automated testing frameworks and test execution processes.
• Knowledge of industrial control systems and industrial networking environments.
• Strong written and verbal communication skills in English.

Preferred Qualifications

• Experience with network management platforms, diagnostic tools, and network troubleshooting utilities.
• Proficiency in programming and scripting languages, particularly Python, for test automation and analysis.
• Experience in software engineering, product development, or product validation.
• ISTQB Foundation Level certification or equivalent software testing qualification.
• Experience with Rockwell Automation industrial control products and networking solutions.