J

Johnson Controls

Provides smart building technology and services

HVAC Senior Controls Service Technician

Full-TimeUpdated on 10/21/2026
$28 - $39/hr
Senior
Associate's
Tucson, AZ, USA
In Person
Building TradesHVAC & Building Systems

About the job

Requirements
  • Minimum of five years of commercial controls troubleshooting experience in the HVAC industry, including buildings, chiller plants, and systems.
  • Vocational school program graduate, an associate's degree in a technical field, or two years of experience servicing electronic and/or mechanical systems.
  • Ability to install and/or service electronic control systems and HVAC equipment.
  • Ability to explain technical information to technical and non-technical people.
  • Effective writing skills and understanding of programs and software applications.
  • Knowledge of control theory, automatic temperature controls, building automation systems, and other building subsystems.
Responsibilities
  • Conduct preventive maintenance, repair, installation, commissioning, and general servicing of systems, including detailed troubleshooting.
  • Maintain high customer satisfaction through direct on-site customer interaction and provide solutions to building inefficiencies and service issues.
  • Mentor control technicians, service technicians, and mechanical technicians on building automation activities.
  • Complete required project and service documentation.
  • Diagnose and repair complex control-system malfunctions, using knowledge of electronic or digital control systems and testing and writing modifications in multiple system-software languages.
  • Consult with customers using gathered data and site assessments; provide field proposals for equipment retrofits, upgrades, and enhancements; and assist sales by providing technical recommendations for leads.
  • Manage assigned work for efficient execution and customer satisfaction; promptly report problems or changes to management; and coordinate project activities with branch, service, and project managers or subcontractors.
  • Provide sketches of field changes and discrepancies for engineering corrections and drawings; assist with job layouts and bid proposals as needed.
  • Install and modify software and graphics.
  • Communicate with customers upon arrival and before leaving the work site; meet regularly with customers to understand operating problems; keep customers informed about services and outstanding issues; recommend enhancements, upgrades, and replacement; and promote add-on work.
  • Follow company and customer safety standards; provide safety leadership and instruction to branch controls technicians; and promote safety awareness when working on site with subcontractors.
  • Train customers in control-system operations and deliver manuals and documentation needed for training.
  • Mentor Controls Technicians and Service Technicians toward certification on complex building automation systems, and coach, support, and train the technical workforce on non-complex, non-critical equipment.
  • Compile job documentation, including certificates of completion, customer training forms, training certificates, and punch lists.
  • Conduct self-study through reading, research, and practice to maintain technical proficiency in company product lines, and complete required certifications.
  • Perform other assigned duties involving installation, commissioning, and servicing of building controls, facilities-management systems, and energy-management systems.
  • Assist with the design and configuration of building control systems according to contract documents; create flow diagrams, sequences of operation, bills of material, network layouts, and electrical schematics as required.
  • Assist in developing and testing software programs needed to operate systems according to project requirements.
  • Compile and complete project as-built and close-out documentation.
  • Assist in coordinating and creating drawings and equipment schedules for submittals and installation.
  • Select, order, and track delivery of assigned materials.
  • Assist with loading and commissioning system- and network-level controllers; validate system functionality and troubleshoot with subcontractors and other trades to ensure proper operation.
  • Provide field-change information to the project team for as-built drawings and software as needed.
  • Keep management and JCI contractors or customers informed about job progress and issues.
  • Assist with site-specific training for building-system owners and operators.
  • Participate in release meetings with the project field team.
  • Recommend solutions to improve facility efficiency, including upselling opportunities, and provide quotes to support recommendations and solutions.

About the company

Johnson Controls transforms environments where people live, work, learn, and play by providing smart, healthy, and sustainable buildings. It offers comprehensive digital solutions through its OpenBlue platform, serving healthcare, education, data centers, airports, stadiums, manufacturing, and government sectors with a portfolio of building technology, software, and services focused on efficiency, safety, and sustainability. The company operates in more than 150 countries with about 100,000 experts and aims to reimagine building performance to benefit people, places, and the planet.

Company Size

10,001+

Company Stage

IPO

Headquarters

Cork, Ireland

Founded

1885

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Simplify's Take

What believers are saying

  • Q3 2026 sales hit $6.6 billion; organic growth reached 10%, lifting margins.
  • Record backlog reached $21 billion in July 2026, fueled by data-center orders.
  • JCI closed Alloy and Nantum in 2026, expanding OpenBlue and cooling capabilities.

What critics are saying

  • A 2026 HVAC price-fixing lawsuit names JCI alongside Bosch, Carrier, Trane, and others.
  • The 2024 restructuring plan still targets $400 million costs through fiscal 2027.
  • PFAS, asbestos, and environmental liabilities persist after the June 2026 Wisconsin settlement.

What makes Johnson Controls unique

  • OpenBlue now embeds Nantum AI’s occupancy-based HVAC optimization across air and water systems.
  • Alloy Enterprises gives JCI proprietary liquid-cooling components for AI data centers.
  • Johnson Controls sells mission-critical service and controls across 150 countries, creating sticky installed-base revenue.

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Benefits

  • Company Vehicle
  • Health Insurance
  • Dental Insurance
  • Vision Insurance
  • Health Savings Account/Flexible Spending Account
  • Life Insurance
  • Disability Insurance
  • 401(k) Company Match
  • Employee Referral Bonus
  • Wellness Program
  • Employee Assistance Program
  • Paid Vacation

Growth & Insights and Company News

Headcount

6 month growth

-4%

1 year growth

-4%

2 year growth

-4%
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Johnson Controls acquires Nantum AI to boost AI-driven energy optimisation in OpenBlue platform

Johnson Controls has acquired Nantum AI, a New York-based developer of AI algorithms for building energy efficiency, to enhance its OpenBlue digital ecosystem. The deal adds advanced AI-driven control capabilities for optimising HVAC systems and reducing energy consumption. Nantum AI's technology enables real-time optimisation of building airflow based on occupancy, extending OpenBlue's capabilities beyond central HVAC systems to include granular, system-wide control. The company has demonstrated energy savings exceeding 10% for customers by leveraging data from occupancy patterns, weather conditions and utility trends. The acquisition expands OpenBlue's optimisation capabilities from water-side systems to include autonomous AI-driven control across both air- and water-side applications. The combined offering is being piloted across complex environments including healthcare campuses and manufacturing facilities.

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Johnson Controls to acquire Alloy Enterprises, boosting data center cooling efficiency by up to 35%

Johnson Controls has signed an agreement to acquire Alloy Enterprises, a Boston-based thermal management technology company, to strengthen its position in the data centre cooling market. Financial terms were not disclosed. Founded in 2020, Alloy Enterprises specialises in advanced direct liquid cooling components that can improve thermal management efficiency by up to 35% and reduce pressure drop by up to 75%, resulting in lower overall cooling system energy use. The company's proprietary Stack Forging manufacturing process creates single-piece components with embedded microgeometries for maximum heat transfer. The acquisition complements Johnson Controls' existing thermal management portfolio and aligns with its strategy to deliver differentiated cooling solutions for AI-driven data centres. The transaction is expected to close in fiscal Q3, subject to regulatory approvals.