Senior Network Engineer

As a Senior Network Engineer, you'll play a critical role in shaping and supporting Epsilon's global network infrastructure by designing, implementing, and solving complex network solutions across multiple datacenters and cloud environments. You'll be part of a passionate team of network professionals, using your deep expertise in routing, switching, load balancing, and network security to implement scalable, automated solutions that meet demanding 24x7x365 operational requirements. Your work will directly influence the performance and reliability of our internal and edge Internet/peering infrastructure, and you'll collaborate closely with vendors and internal partners to ensure procedures and standards are upheld. If you're a meticulous engineer eager to grow and make a meaningful impact in a dynamic, service-based enterprise environment, we'd love to connect with you.

What You'll Achieve

• Lead the design, implementation, and optimization of network services, tools, and infrastructure across on-premises, hybrid, and multi-cloud environments.
• Engineer scalable, automated cloud networking solutions using AWS VPCs, Transit Gateways, Direct Connect, PrivateLink, Route53 Resolver, GCP VPCs, Cloud Interconnect, Cloud DNS, and Azure VNets, ExpressRoute, and Private DNS, ensuring secure and resilient connectivity.
• Build and maintain infrastructure as code using Terraform, Ansible, CloudFormation, and Deployment Manager, ensuring configuration consistency, policy enforcement, and preventing drift.
• Develop and manage Network DevOps and CI/CD pipelines for network provisioning, configuration management, and observability.
• Automate provisioning, configuration, and monitoring tasks using Python, Go, Bash, and PowerShell, integrating with AWS Lambda, GCP Cloud Functions, and Azure Functions.
• Collaborate with SRE, cloud security, and platform teams to ensure alignment with zero trust, compliance frameworks, and cloud-native security controls.
• Solve complex hybrid networking issues across LAN, WAN, cloud interconnects, Internet, and routing protocols (BGP, OSPF, EVPN, VXLAN).
• Implement cloud load balancers, CDN integrations, DNS failover, and traffic steering policies for high availability and global resiliency.
• Evaluate and deploy next-gen technologies, including service mesh, cloud-managed firewalls, cloud-native monitoring, and observability platforms.
• Drive adoption of standard processes for cost optimization, tagging strategies, and governance across multi-cloud infrastructure.
• Continuously assess existing systems, identify areas for improvement, and implement effective automation-driven solutions.
• Standardize documentation, runbooks, and design patterns for network and cloud operations.

• 6+ years of experience supporting high-performance production environments. .
• Proven experience designing and operating secure hybrid multi-cloud networks, including site-to-site VPNs, ExpressRoute, Direct Connect, Cloud Interconnect, and Transit Gateway topologies.
• Strong programming and automation skills in Python, with experience in network automation frameworks and cloud SDKs/APIs (boto3, gcloud, azure-cli).
• Deep expertise with infrastructure as code and DevOps tooling (Terraform, Ansible, GitHub Actions, Jenkins, GitLab CI/CD, ArgoCD).
• Advanced knowledge of networking protocols and technologies including Ethernet (10/40/100/400Gbps), OSPF, BGP, EVPN/VXLAN, IPSec, DHCP, DNS, SNMP, LACP, IPv6, and TCP.
• Hands-on experience with enterprise networking platforms such as Cisco Catalyst and Nexus, Dell Force10, Arista, F5 Big-IP, and Palo Alto firewalls.
• Expertise in cloud-native firewalls and security groups, Web Application Firewalls (AWS WAF, Azure WAF, GCP Cloud Armor), and DNSSEC/DoH.
• Proficiency with cloud-native monitoring and observability tools (CloudWatch, Cloud Logging, Azure Monitor, Prometheus, Grafana, Datadog).
• Experience developing cloud networking infrastructure including DNS, CDNs, load balancers, VPCs, subnets, NAT gateways, peering, and service mesh.
• Strong working knowledge of security frameworks and regulations (e.g., ISO 27001, NIST, PCI DSS, CIS Benchmarks).
• Demonstrated ability to lead incident response, RCA, and performance tuning across distributed systems.
• Familiarity with FinOps practices for cloud cost optimization and forecasting.
• Strong communication and documentation skills to collaborate across technical and business teams.
• Cloud certifications (AWS Solutions Architect/Advanced Networking, GCP Professional Cloud Network Engineer, Azure Network Engineer Associate), along with Cisco/Palo Alto certifications.
• Participate in after-hours on-call rotation as needed.

• Why you might stand out from other talent:

• Experience designing, implementing, maintaining secure On-Prem & cloud network environments.
• Demonstrated leadership in driving automation adoption across traditional and cloud networking environments.
• Experience with service provider-scale environments or global SaaS organizations.
• Proven ability to integrate network operations with DevSecOps pipelines and GitOps workflows.
• Led transformational initiatives improving operational efficiency via self-service platforms, automation, and AIOps/ML-driven insights.
• Demonstrated knowledge of modern technologies, including AI/ML to enhance IT operations and client engagement.

Tuition reimbursement, Parental leave, 401(k), Health insurance, Paid sick time, Adoption assistance, Commuter assistance, Paid holidays, As an Epsilon employee, you deserve perks and benefits that put you, your family and your finances first. Our benefits encompass a wide range of offerings, including but not limited to the following:

• Time to Recharge: Flexible time off (FTO), 15 paid holidays
• Time to Recover: Paid sick time
• Family Well-Being: Parental/new child leave, childcare & elder care assistance, adoption assistance
• Extra Perks: Comprehensive health coverage, 401(k), tuition assistance, commuter benefits, professional development, employee recognition, charitable donation matching, health coaching and counseling

Epsilon benefits are subject to eligibility requirements and other terms.

Epsilon is a global data, technology and services company that powers the marketing and advertising ecosystem. For decades, we've provided marketers from the world's leading brands the data, technology and services they need to engage consumers with 1 View, 1 Vision and 1 Voice. 1 View of their universe of potential buyers. 1 Vision for engaging each individual. And 1 Voice to harmonize engagement across paid, owned and earned channels. Epsilon's comprehensive portfolio of capabilities across our suite of digital media, messaging and loyalty solutions bridge the divide between marketing and advertising technology. We process 400+ billion consumer actions each day using advanced AI and hold many patents of proprietary technology, including real-time modeling languages and consumer privacy advancements. Thanks to the work of every employee, Epsilon has been consistently recognized as industry-leading by Forrester, Adweek and the MRC. Epsilon is a global company with more than 9,000 employees around the world. Our pillars aren't just words. They're how we show up every day. * People centricity: We focus on employee well-being in an environment where colleagues truly care about each other. * Collaboration: We work together, support one another, and collectively achieve goals. * Growth: There are endless opportunities for growth through learning, development and career advancement. * Innovation: We drive progress through cutting-edge solutions and forward-thinking approaches. * Flexibility: We've created a balance between work and personal life, and we encourage adaptability to solve problems creatively. Our values guide us to create value for our clients, our people and consumers. * Act with integrity * Work together to win together * Innovate with purpose * Respect all voices * Empower with accountability These pillars and values are our foundation-shaping our culture, guiding our decisions, and uniting us in common purpose., For San Francisco Bay and Los Angeles Areas: Epsilon will consider for employment qualified applicants with criminal histories in a manner consistent with the City of Los Angeles' Fair Chance Initiative for Hiring Ordinance and San Francisco Police Code Sections 4901-4919, commonly referred to as the San Francisco Fair Chance Ordinance. Applicants with criminal histories are welcome to apply.