Controls Systems Engineer – HVAC/BAS

AllSTEM Connections is hiring a Controls Systems Engineer for commercial HVAC control systems and Building Automation Systems (BAS). This long-term contract-to-hire role supports facilities across New Hampshire and Maine with a blend of onsite field work and office-based engineering.

Role Overview

In this position, you will design, engineer, and support HVAC control solutions for large facilities, including centralized BAS and DDC control applications. Work includes reviewing project documentation, developing control strategies and system designs, coordinating with multiple project stakeholders, and providing commissioning and troubleshooting support.

Responsibilities

• Design and engineer HVAC control systems for commercial buildings and large facilities
• Develop control solutions for HVAC equipment and centralized building systems
• Support Building Automation System (BAS) and DDC control applications
• Review mechanical drawings, specifications, sequences of operation, and project requirements
• Create control strategies and system designs based on project requirements
• Coordinate with project managers, engineers, electricians, mechanical contractors, technicians, and customers
• Visit project sites to support installation, troubleshooting, commissioning, and system integration
• Review existing HVAC control systems and develop retrofit or upgrade solutions
• Assist with system startup, testing, commissioning, and field troubleshooting
• Support multiple projects while maintaining schedules and technical requirements
• Communicate technical information with customers and internal project teams
• Travel throughout New Hampshire and Maine as required

Required Qualifications

• 3+ years of experience in HVAC controls, building automation, or a closely related field
• Hands-on knowledge of commercial HVAC systems
• Experience with HVAC controls, DDC, BAS, or building automation systems
• Understanding of HVAC equipment and control applications including AHUs, VAV systems, rooftop units, chillers and chilled-water systems, boilers and hot-water systems
• Understanding of pumps, fans, dampers, and VFDs
• Ability to interpret mechanical drawings, control diagrams, and sequences of operation
• Strong troubleshooting and problem-solving skills
• Ability to work independently and collaboratively in field and office environments
• Willingness to travel to customer and project sites throughout NH and Maine

Technologies

• HVAC controls
• DDC
• BAS (Building Automation Systems)
• BACnet
• Modbus
• Johnson Controls / Metasys
• Siemens / Apogee
• Honeywell
• Tridium / Niagara
• Automated Logic
• Distech

Preferred Qualifications

• Associate or Bachelor's degree in Mechanical Engineering, Instrumentation, Controls Engineering, or a related technical discipline
• Experience designing or engineering BAS/DDC systems
• Experience with commercial building automation platforms such as Johnson Controls / Metasys, Siemens / Apogee, Honeywell, Tridium / Niagara, Automated Logic, or Distech
• Knowledge of BACnet, Modbus, or other building controls communication protocols
• Experience with HVAC controls programming, commissioning, or system integration
• Experience transitioning from senior HVAC controls technician into an engineering/design role is welcome

Work Schedule and Environment

• Work location: Sioux Falls, SD (onsite)
• Typical schedule: primarily onsite/field and office, 6:00 AM–2:30 PM or 7:00 AM–3:30 PM
• Field/site vs. office split: approximately 30–50% field/site work and 50–70% office work
• Travel: regular travel throughout New Hampshire and Maine

Compensation and Contract Details

• Salary: USD 40–50 per hour
• Job type: contract
• Experience level: 3+ years

Benefits

• 401(k)
• Dental insurance
• Vision insurance

Role Fit Notice

Candidates whose experience is limited to residential HVAC, security systems, fire alarm systems, or general industrial PLC/SCADA controls without commercial HVAC/BAS experience are not the target profile for this position.