Senior Lead Networking Test Engineer

Req ID: 129192

Region: Americas

Country: USA

State/Province: New Hampshire

City: Merrimack

Functional Area: Engineering

Career Stream: Design - Software Engineering

SAP Short Name: SLE-ENG-DSE

Job Level: Level 09

IC/MGR: Individual Contributor

Direct/Indirect Indicator: Indirect

The Senior Lead Networking Test Engineer will be responsible for defining, developing, and executing comprehensive test strategies for our cutting-edge data center network solutions. This role is a blend of hands-on technical expertise, strategic planning, and leadership. You will lead a small team of test engineers, mentor junior members, and collaborate closely with network architects, developers, and operations teams to deliver robust, high-performance, and scalable network solutions for our data centers. This position requires deep expertise in modern data center networking technologies, automation, and a passion for quality assurance.

• Lead the definition and development of holistic test strategies, test plans, and test cases for complex data center network solutions, including Layer 2/3, SDN, DCN, EVPN/VxLAN, and high-performance fabrics (e.g., RDMA/RoCE).
• Work closely with network architecture and engineering teams to understand design specifications and translate them into effective test methodologies.
• Identify key performance indicators (KPIs) and scalability metrics for network validation.
• Hands-on execution of complex network tests, including functional, performance, scalability, stability, and reliability testing.
• Analyze test results, identify defects, conduct root cause analysis, and work with development teams to resolve issues.
• Perform deep-dive packet analysis and network protocol debugging using tools like Wireshark, tcpdump, and network analyzers.
• Design, develop, and maintain advanced test automation frameworks and scripts (e.g., Python, Ansible, Terraform, Robot Framework) to accelerate testing cycles and improve efficiency.
• Evaluate, recommend, and integrate new testing tools and technologies into our CI/CD pipelines.
• Drive the adoption of best practices in test automation and continuous integration.
• Lead and mentor a small team of networking test engineers, providing technical guidance, code reviews, and fostering a culture of excellence and continuous improvement.
• Act as a technical subject matter expert for network testing within the organization.
• Drive innovation in test methodologies and processes.
• Collaborate cross-functionally with network architecture, development, operations, and product teams to ensure comprehensive test coverage and high-quality deliverables.
• Clearly communicate test progress, risks, and results to stakeholders at all levels.
• Contribute to documentation, runbooks, and operational guides.

• Education: Bachelor's or Master's degree in Computer Science, Electrical Engineering, Network Engineering, or a related technical field.
• 8+ years of experience in network engineering, network operations, or network testing roles, with at least 3 years focused specifically on data center networking.
• 3+ years of experience in a lead or senior technical role, mentoring junior engineers or leading test initiatives.
• Expert-level understanding and hands-on experience with Layer 2 and Layer 3 networking protocols in large-scale data center environments (e.g., BGP, OSPF, ISIS, MPLS).
• Extensive experience with modern data center interconnect technologies (EVPN/VxLAN).
• Strong knowledge of high-performance networking, including RDMA over Converged Ethernet (RoCE) and associated congestion control mechanisms (PFC, ECN, DCQCN).
• Familiarity with network operating systems like SONiC (preferred), Cisco NX-OS, Arista EOS, and Juniper Junos.
• Proficiency in at least one scripting language (e.g., Python, Go) for test automation, API integration, and data processing.
• Experience with network automation tools (e.g., Ansible, Terraform, Netmiko, NAPALM).
• Experience building and maintaining test frameworks (e.g., Robot Framework, Pytest).
• Proven experience designing and executing various types of network tests: functional, performance (throughput, latency, jitter), scalability, reliability, and security.
• Expertise with network testing tools (e.g., IXIA, Spirent, Keysight, TRex, Ostinato, SmartBits).
• Strong packet analysis and troubleshooting skills using Wireshark, tcpdump, or similar tools.
• Strong proficiency in Linux/Unix operating systems.
• Understanding of virtualization (VMware, KVM) and containerization technologies (Docker, Kubernetes).
• Exceptional analytical and problem-solving skills with a meticulous attention to detail.
• Ability to isolate complex network issues spanning multiple layers and technologies.

• Experience with SDN controllers and orchestration platforms.
• Experience with ESXi
• Familiarity with cloud networking concepts (AWS, Azure, GCP).
• Knowledge of network security principles and testing.
• Relevant industry certifications (e.g., CCIE, JNCIE, CCNP Data Center, Linux Foundation Certified Engineer, Mellanox certifications).

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.