Senior HVAC Technical Support Engineer II

AAON, Inc.; United States; On-site; USD 85,000 - 115,000; Full time

Job summary

AAON, Inc. designs and manufactures high-performance HVAC systems for critical facilities across the United States.

The Technical Support Specialist acts as a technical authority, diagnosing complex HVAC mechanical, electrical, and control issues and guiding field technicians during critical events to protect uptime and revenue. You’ll interpret wiring diagrams and sequence of operation, assess safety devices, and collaborate with operations, sales, manufacturing, and engineering to drive

Qualifications

• Diagnostic expertise in commercial HVAC mechanical and electrical systems.
• Strong knowledge of refrigeration circuits, airflow dynamics, safety controls, and system integration.
• High-level proficiency interpreting wiring diagrams and control schematics.
• Understanding commercial HVAC controls platforms and safety standards.
• Clear, confident technical communication during live service events.

Responsibilities

• Protects system uptime in mission-critical environments.
• Mitigates financial exposure and warranty risk.
• Safeguards customer relationships and brand equity.
• Interprets wiring diagrams, sequence of operation, and mechanical schematics with precision.
• Guides technicians toward safe, code-compliant, and performance-driven solutions.
• Communicate with authority during high-pressure field events.
• Documents technical findings to improve organizational learning.

Skills

Diagnostics

HVAC Systems

Electrical/Control

Wiring Diagrams

Controls Platforms

Customer Communication

Judgment

Job description

AAON, Inc. designs and manufactures high-performance HVAC systems for critical facilities across the United States.

The Technical Support Specialist acts as a technical authority, diagnosing complex HVAC mechanical, electrical, and control issues and guiding field technicians during critical events to protect uptime and revenue. You’ll interpret wiring diagrams and sequence of operation, assess safety devices, and collaborate with operations, sales, manufacturing, and engineering to drive