Network and Security Test Engineer

Req ID: 129196

Region: Americas

Country: USA

State/Province: New Hampshire

City: Merrimack

Functional Area: Engineering

Career Stream: Design - Software Engineering

SAP Short Name: ENG-ENG-DSE

Job Level: Level 07

IC/MGR: Individual Contributor

Direct/Indirect Indicator: Indirect

The Network and Security Compliance Test Engineer will be responsible for validating the network functionality, performance, and security posture of our AI data center infrastructure. This role requires a strong understanding of networking fundamentals, routing protocols, hands-on experience with traffic generation, and a keen eye for security vulnerabilities. You will be instrumental in ensuring our network adheres to compliance standards and provides a reliable, secure foundation for our demanding AI workloads.

As a Network and Security Compliance Test Engineer, you will be a key contributor to the design, implementation, and validation of our AI data center's network and security posture. You'll leverage your deep expertise in networking, routing protocols, and test automation to identify vulnerabilities, optimize performance, and ensure our systems meet the highest standards of security and compliance. This role requires a hands-on approach, strong analytical skills, and the ability to drive complex testing initiatives.

Responsibilities:

• Lead the development and execution of comprehensive test plans and strategies for complex network topologies and devices within our AI data center.
• Drive the design of advanced test cases for L2/L3 functionalities, focusing on performance, scalability, and resilience under high-demand AI workloads.
• Oversee and conduct in-depth testing of routing protocols (e.g., BGP, OSPF, ISIS) to validate network convergence, stability, and optimal traffic flow.
• Analyze and interpret complex test data to identify network bottlenecks, performance degradation, and areas for optimization.
• Architect and implement robust security test methodologies to rigorously validate network security controls and configurations.
• Perform advanced vulnerability assessments, penetration testing, and security audits on network infrastructure to proactively identify and mitigate risks.
• Develop and integrate automated security compliance checks into continuous integration and deployment pipelines.
• Design, develop, and maintain sophisticated test automation frameworks and scripts primarily using Python, significantly enhancing test efficiency, coverage, and repeatability.
• Champion the adoption of automation best practices across the team.
• Develop custom tools and utilities to simulate complex network conditions and analyze performance.
• Provide expert-level troubleshooting and root cause analysis for complex network and security incidents, collaborating effectively with cross-functional engineering and operations teams.
• Actively participate in network architecture reviews, offering critical insights to ensure testability, reliability, and security are built into designs from inception.
• Mentor and guide junior test engineers, fostering their technical growth and promoting a culture of quality and innovation.

• Bachelor's degree in Computer Science, Electrical Engineering, or a related technical field.
• 3+ years of progressive experience in network testing, with a significant focus on enterprise or hyperscale data center environments.
• Deep knowledge of network architecture and advanced networking concepts (e.g., VXLAN, EVPN, MPLS).
• Experience with various routing protocols, including advanced configurations and troubleshooting of BGP, OSPF, EIGRP, or ISIS.
• Hands-on experience with commercial traffic generators (e.g., IXIA, Spirent) and/or advanced open-source tools (e.g., TRex, Ostinato, DPDK-based solutions).
• Strong proficiency in Python for automation, including developing complex test scripts, frameworks, and API integrations.

• CCNA certification is required; CCIE is highly preferred.
• Direct, hands-on experience with SONiC OS in a production or large-scale test environment.
• Working experience or strong familiarity with OCP (Open Compute Project) networking principles and hardware designs.
• Experience with software-defined networking (SDN) and network function virtualization (NFV) concepts and testing.
• Proven experience with network security tools and methodologies (e.g., firewalls, IDS/IPS, access control, encryption).
• Familiarity with cloud networking concepts (AWS, Azure, GCP).
• Experience with Linux system administration and container orchestration (Docker, Kubernetes).

This job description is not intended to be an exhaustive list of all duties and responsibilities of the position. Employees are held accountable for all duties of the job. Job duties and the % of time identified for any function are subject to change at any time.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.

Celestica's policy on equal employment opportunity prohibits discrimination based on race, color, creed, religion, national origin, gender, sexual orientation, gender identity, age, marital status, veteran or disability status, or other characteristics protected by law.

This policy applies to hiring, promotion, discharge, pay, fringe benefits, job training, classification, referral and other aspects of employment and also states that retaliation against a person who files a charge of discrimination, participates in a discrimination proceeding, or otherwise opposes an unlawful employment practice will not be tolerated. All information will be kept confidential according to EEO guidelines.

COMPANY OVERVIEW:

Celestica (NYSE, TSX: CLS) enables the world's best brands. Through our recognized customer-centric approach, we partner with leading companies in Aerospace and Defense, Communications, Enterprise, HealthTech, Industrial, Capital Equipment and Energy to deliver solutions for their most complex challenges. As a leader in design, manufacturing, hardware platform and supply chain solutions, Celestica brings global expertise and insight at every stage of product development – from drawing board to full-scale production and after-market services for products from advanced medical devices, to highly engineered aviation systems, to next-generation hardware platform solutions for the Cloud. Headquartered in Toronto, with talented teams spanning 40+ locations in 13 countries across the Americas, Europe and Asia, we imagine, develop and deliver a better future with our customers.

Celestica would like to thank all applicants, however, only qualified applicants will be contacted.

Celestica does not accept unsolicited resumes from recruitment agencies or fee based recruitment services.

This location is a US ITAR facility and these positions will involve the release of export controlled goods either directly to employees or through the employee's movement within the facility. As such, Celestica will require necessary information from all applicants upon an applicant's acceptance of employment to determine if any export control exemptions or licenses must be filed.