Engineer, Data Center

Linked In is the world's largest professional network, built to create economic opportunity for every member of the global workforce. Our products help people make powerful connections, discover exciting opportunities, build necessary skills, and gain valuable insights every day. We're also committed to providing transformational opportunities for our own employees by investing in their growth. We aspire to create a culture that's built on trust, care, inclusion, and fun – where everyone can succeed.

Join us to transform the way the world works.

This role will be based in Hillsboro, OR.

At Linked In, our approach to flexible work is centered on trust and optimized for culture, connection, clarity, and the evolving needs of our business. The work location of this role is on-site, meaning it will be performed in the specified office on a full-time basis due to the business needs of the team.

As an onsite Data Center Engineer, you will be responsible for hardware deployments and acting as a point of escalation for our contracted employees responsible for addressing server break fix tickets. You will also assist Senior Data Center Engineers with the deployment of network, storage, and server nodes within your region. We are looking for candidates with server and network hardware installation experience, network cabling experience, server break fix experience, experience troubleshooting Linux Kickstart issues, and Linux/Unix troubleshooting skills.

Responsibilities:

• Operate, monitor, and maintain the liquid-cooling infrastructure supporting Linked In's GPU and machine learning fleet, including Coolant Distribution Units (CDUs), secondary/technology cooling loops, manifolds, quick-disconnects, and rear-door heat exchangers.
• Monitor loop health — supply/return temperature (ΔT), differential pressure (ΔP), flow rate, and fluid conductivity — and act on alarms before they impact GPU availability.
• Perform and coordinate coolant sampling, water chemistry and fluid quality testing, filter changes, and fluid top-offs in accordance with OEM and Linked In standards.
• On a daily basis, review Linked In's DCIM Incident Dashboard and act on any fatal or warning incidents, escalating to your regional Site Supervisor or Senior Critical Infrastructure Engineer as necessary. Triage warning notifications to determine how they should be acted upon or suppressed.
• Monitor environmentals for all data center suites and ensure they remain within ASHRAE standards as defined in our leases with providers.
• Utilize internal tools (DCIM) and external tools (provider portals, BMS) to monitor power load, capacity, and environmental data across all data center suites.
• Review all MOPs, SOPs, and maintenance advisories provided by the facility operator; flag gaps, sequencing risk, or deviations from Linked In standards before work begins.
• Ensure major maintenance activities are captured in Linked In's internal change management process with appropriate risk classification, notification, and rollback plans.
• Maintain the regional Critical Infrastructure maintenance calendar and keep stakeholders informed of upcoming high-risk activities.
• Coordinate and schedule supplier/vendor onsite activities, including access, escort, and safety briefings.
• Exercise stop-work authority — recognize when vendor work is unsafe, out of sequence, or out of compliance, and halt the work to address concerns.
• In collaboration with the provider's site engineering team, support annual and quarterly preventive maintenance on all critical infrastructure, verifying that Linked In standards and industry best practices are followed.
• Support server, storage, and network deployments within your region — racking, cabling, initial configuration, and quality…