Sr Mechanical Cx Engineer, Data Center Engineering

Do you want to help build some of the largest and most consequential enterprise

and customer technology systems in the world? Join Apple’s Information Systems

and Technology (IS&T) organization. IS&T is the engine behind everything Apple

does for customers and for the people who build for them. It’s Apple’s central

nervous system. Supporting 2.5 billion active Apple devices, processing billions

of secure transactions, and keeping the technology that defines modern life

running flawlessly, IS&T makes the impossible feel effortless. Do you love

building solutions to handle global complexity and immense scale? Imagine what

you could do here. Infrastructure Services is part of IS&T and the foundation of

Apple's global network operations — managing data center equipment and systems

to deliver compute, storage, and networking services for teams across Apple,

including its internal developer community. From individual facilities to a

worldwide network, Infrastructure Services ensures the technology underneath

everything works without question. The Data Center Commissioning team is looking

for a Senior Technical Mechanical Engineer with depth in mechanical cooling

systems, hydronics, airflow dynamics, fire protection systems, and mechanical

building automation. The successful candidate will serve as the primary

mechanical technical authority across the full commissioning lifecycle (Levels

1–5) supporting all new Apple data centers, enterprise compute expansions, and

specialized critical spaces/labs.

DESCRIPTION

In this role, you will govern the end-to-end commissioning lifecycle by managing

third-party Commissioning Agents (CxA) rather than executing tests directly.

With a strong emphasis on technical oversight, script validation, and

cross-functional leadership, you will direct all project phases, including

design commissionability reviews, Factory Acceptance Testing (FAT),

Pre-Functional Testing (PFT), Functional Performance Testing (FPT), and

Integrated Systems Testing (IST).

MINIMUM QUALIFICATIONS

Bachelor's degree in Mechanical Engineering, Architectural Engineering, Systems

Engineering, or a related engineering discipline (or equivalent

practical/job-related experience). 5+ years of direct experience commissioning

and or managing the commissioning of mechanical and HVAC systems in a Hyperscale

data center environment. Understanding of large-scale mechanical cooling systems

(such as central chilled water plants, cooling towers, air-cooled/water-cooled

chillers, CRAH/CRAC units, and pumping infrastructure). Experience with the

commissioning, testing, and or validation of data center fire protection,

suppression, and early warning fire detection systems. Experience developing,

reviewing, approving, and or overseeing the execution of Level 4 (Functional

Performance Testing) and Level 5 (Integrated Systems Testing) test scripts and

procedures. Experience with mechanical Sequence of Operations (SOO) validation

under dynamic load conditions. Willingness and ability to travel approximately

40%, with availability for international travel as needed to support vendor

factory testing and global site commissioning activities.

PREFERRED QUALIFICATIONS

Professional Engineer (PE) license in Mechanical Engineering strongly preferred.

8+ years of mission-critical mechanical commissioning leadership experience

covering greenfield hyperscale data center campuses and specialized R&D/hardware

lab facilities. Deep practical expertise in high-density compute cooling,

including liquid-to-liquid / liquid-to-air Coolant Distribution Units (CDUs),

secondary fluid loops, manifold design validation, and direct-to-chip cooling

commissioning. Experience with commissioning management software platforms (such

as CxAlloy, Facility Grid, or similar tools) for script management, issue

tracking, and project reporting. Practical knowledge of Building Automation

Systems (BAS) and Direct Digital Control (DDC) platforms, including PID loop

tuning, sensor calibration validation, network architecture, and communication

protocols (BACnet, Modbus). Experience with data center load bank deployment,

variable-capacity heat-load testing strategies, acoustic testing, and thermal

imaging/infrared thermography. Demonstrated track record of resolving complex

field engineering challenges, conducting Failure Modes and Effects Analysis

(FMEA), and driving continuous improvement into corporate commissioning

standards and specifications. Experience utilizing data trending, BMS telemetry,

and Python scripting or data visualization tools to evaluate equipment

performance curves, plant efficiency (kW/ton, PUE), and transient response

during failover tests. Proficiency with AI tools to enhance daily work —

including AI-assisted authoring and redlining of commissioning scripts,

automated parsing of submittals and sequences of operations, and leveraging

predictive analytics and anomaly detection over operational telemetry.