Senior Systems Architect

Simple Part, part of Infomedia’s global automotive SaaS platform, operates 2,750 dealer websites across 25 OEM catalogs. Our parts e-commerce solutions serve dealership networks globally, processing transactions across multiple payment integrations in a PCI DSS-regulated environment. We are entering a pivotal modernization phase while maintaining rigorous compliance with PCI DSS 4.0 and ISO 27001 and pursuing SOC 2 certification.

As Senior Systems Architect, you will own the architectural vision for Simple Part’s infrastructure: maintaining the reliability and security of our current global colocation datacenter environment while designing and driving the plan for modernization.

You’ll be a hands‑on architect working across four colocation datacenters (Atlanta, Amsterdam, London, Portland), responsible for network design and operations, security posture, compliance readiness, and architecture.

Beyond the technical work, you’ll serve as a technical leader through mentoring junior engineers, setting standards, and helping shape the direction and capabilities of the infrastructure organization as we grow.

• Own the design, implementation, and ongoing optimization of network architecture across all colocation sites and cloud environments.
• Architect and manage network segmentation, VLANs, VPN tunnels, routing, DNS, and DHCP across a geographically distributed infrastructure.
• Administer and optimize pf Sense firewalls and Snort IDS/IPS, ensuring network integrity and compliance with segmentation requirements.
• Cloudflare WAF and proxy configurations to protect public‑facing dealer websites and e‑commerce applications.
• Design hybrid connectivity solutions bridging on‑premises datacenters and AWS as workloads migrate.

• Design, maintain, and optimize Windows Server environments (2016–2022) across production, staging, and development tiers.
• Manage Active Directory, IIS, Group Policy, and supporting services for 3k+ dealer websites.
• Manage Proxmox virtualization environments, optimizing resource allocation and infrastructure flexibility.
• Oversee and improve server patching cadence and compliance across all environments.
• Design and maintain comprehensive disaster recovery and backup strategies.
• Participate in a 24/7/365 on‑call rotation for critical incident response.
• Evaluate and recommend cloud‑native replacements for on‑premises services across compute, storage, networking, and monitoring.
• Architect infrastructure to support the modernization of Simple Part’s application stack and data platform, including migration from legacy systems.
• Establish infrastructure‑as‑code practices (Terraform, Cloud Formation, or equivalent) and cloud operational standards.

• Serve as a primary technical resource for PCI DSS 4.0 audit readiness and ongoing compliance across all applicable requirements.
• Support ISO 27001 compliance maintenance and contribute to SOC 2 certification efforts.
• Oversee vulnerability assessments using Tenable/Nessus and drive remediation priorities across the environment.
• Maintain and improve security tooling:
  Microsoft Defender, DUO MFA, and Cloudflare security configurations.
• Ensure cryptographic standards, access controls, and segmentation testing meet current compliance requirements.
• Maintain detailed documentation for network diagrams, system designs, configurations, and compliance artifacts.

• Serve as the senior technical authority on the infrastructure and security team, setting architectural direction and standards.
• Mentor and develop junior team members through hands‑on guidance and knowledge sharing.
• Drive technical decision‑making and build a culture of documentation, automation, and continuous improvement.
• Collaborate cross‑functionally with development, product, and executive leadership on modernization planning and roadmap execution.

• 7+ years of experience in systems engineering, infrastructure architecture, or a similar senior technical role.
• Deep networking expertise: demonstrated experience designing and managing enterprise network…