HVAC Controls Design Specialist — BAS Documentation

AiRCO Mechanical Ltd.; Round Rock (TX); On-site; USD 85,000 - 125,000; Full time

Benefits offered by this job

Two weeks paid vacation

Excellent health insurance

401(k) with company match

Tuition reimbursement

Life insurance

Job summary

AiRCO Mechanical Ltd. seeks a Building Automation Systems (BAS) designer to translate project scope into compliant BAS designs and submittals.

You will develop full BAS packages, including risers, network layouts, and wiring diagrams for HVAC and electrical systems, while validating Sequences of Operations for performance. You will produce accurate Bills of Materials and documentation using AutoCAD and Visio, perform load calculations, and assist with design integration and RFIs as needed.

Qualifications

• Deep HVAC knowledge across RTUs/FCUs/VAVs, AHUs, DOAS, MUA, chillers, boilers, and hydronic systems.
• Proficiency in AutoCAD and Microsoft Visio (CDT).
• Strong documentation habits and attention to detail.

Responsibilities

• Translate scope, budget, and contract documents into compliant Building Automation Controls designs.
• Develop full BAS submittal packages with riser diagrams, network architecture, and wiring schematics for HVAC and electrical systems.
• Create Sequences of Operations (SOO) to meet performance requirements.
• Produce Bills of Materials and engineered documents using AutoCAD and Visio.
• Perform BAS system design including load calculations, equipment selection, and control system integration.
• Support Sales during estimation and bid phases with design input.
• Collaborate with Project Managers to craft RFIs and resolve plan/spec discrepancies.
• Integrate BACnet MSTP/IP, Modbus TCP/RTU, and LonWorks protocols.
• Maintain meticulous documentation for design systems and configurations.
• Independently manage large projects with budget and schedule awareness.

Skills

HVAC knowledge

BAS design

System documentation

AutoCAD

Microsoft Visio

Tools

Tridium Niagara

Spyder

EIKON

EC-gfxProgram

Job description

Shape smarter buildings with precise BAS design and submittals Join Airco Mechanical—an established MEP leader with more than four decades of success and over 1,000 employees—and turn complex project requirements into crystal‑clear engineering deliverables.

Why you’ll love working here

• Professional, technical, and financial growth in a thriving Building Automation group.
• Impact across commercial projects where quality documentation drives installation success.
• Access to modern tools and a collaborative team that values initiative.

What you’ll do

• Translate scope, budget, and contract documents into compliant Building Automation Controls designs.
• Develop full BAS submittal packages: detailed riser diagrams, network architecture, and physical point‑to‑point wiring schematics for HVAC and electrical systems.
• Create and validate Sequences of Operations (SOO) to ensure performance requirements are met.
• Produce accurate Bills of Material and polished engineered documents using AutoCAD and Microsoft Visio (CDT).
• Perform BAS system design: load calculations, equipment selection, and control system integration.
• Support the Sales team during estimation and bid phases with design input.
• Collaborate with Project Managers to craft RFIs; identify and resolve plan/spec discrepancies.
• Integrate protocols expertly: BACnet MSTP/IP, Modbus TCP/RTU, and LonWorks.
• Maintain meticulous documentation for design systems, wiring diagrams, and software configurations.
• Independently execute large, complex projects using standard tools and practices with smart deviations where appropriate.
• Forecast required design labor and track against budget and forecast goals.
• Coordinate with external customers and vendors to ensure accuracy and timeliness.
• Assist with project timeline, budget, and cross‑team coordination.
• Recommend products that add functionality and value; support service engineering for existing buildings.
• When assigned, develop and maintain engineering standards libraries for both Bosch Building Technologies and the industry.
• Other duties as assigned.

Must‑have capabilities

• Deep HVAC knowledge: RTUs, FCUs, VAV boxes; AHUs, DOAS, MUA; hydronic systems with valve sizing; chiller plants (air‑cooled/water‑cooled), cooling towers; boiler plants with heat exchangers.
• Proficiency in AutoCAD and Microsoft Visio (CDT).
• Strong documentation habits and attention to detail.

Preferred qualifications

• 2+ years programming experience with Tridium/Niagara, Spyder tool, EIKON, EC‑gfxProgram, and/or Controller Configuration Tool.
• Track record proposing cost‑effective technical solutions.
• Experience maintaining internal standards, libraries, or best practices for design/engineering.
• Background in both design and support/service engineering for installed building systems.

Benefits and support

• Two weeks paid vacation in year one
• Paid holidays and sick leave
• Excellent health, vision, and dental insurance with low employee cost
• Life insurance (2× salary paid by company)
• Short‑term and long‑term disability insurance (company‑paid)
• Accidental death and dismemberment insurance
• Optional additional life insurance
• 401(k) with company match
• Health Savings Accounts
• Teladoc
• Employee Assistance Program
• Tuition reimbursement

How we work

• Operate with minimal supervision and high ownership.
• Communicate proactively through RFIs and coordination with PMs, vendors, and customers.
• Balance precision with progress—hit schedule and budget targets without compromising quality.