Faik Öz portrait

HVAC operations & Software architecture

  • Head of Estimation & Project Delivery at Vic Air Supplies
  • M.Sc. Mechanical Engineer (CFD)
  • Full-stack architect of the company's internal software stack: six production platforms plus a shared Microsoft Dynamics 365 Business Central client SDK

About

M.Sc. Mechanical Engineer (CFD) with 10+ years of front-line HVAC delivery in Melbourne.

Head of Estimation & Project Manager at Vic Air Supplies: three direct reports, owning the commercial, procurement, and operations interfaces across Sales, Sheet Metal, Warehouse, and Finance.

Alongside that, I architect and operate the company's internal software stack: six production platforms plus a shared Microsoft Dynamics 365 Business Central client SDK underneath them.

My work unifies project management and software architecture, and the combination matters: the software that runs an HVAC business (estimating, procurement, forecasting, workforce, finance, BI) fails or succeeds on the same operational details I see daily on the project delivery side. Building the stack in-house, with deep business context, has produced an edge that neither discipline could deliver alone.

Scope: $20M+ disclosed project book; largest single project $5.8M; standards experience across NCC/BCA, AS 1668, AS 4254.

What the stack has displaced
  • Power BI + Azure data-warehouse + ETL stack for live sales-ledger visibility
  • Forecasting-SaaS tier (Netstock/Slimstock category) for inventory and supplier planning
  • Workforce-management SaaS tier
  • External banker-grade financial modelling: the in-house three-way model is the analytical basis for ongoing NAB facility reviews

 

 

 

    Selected work

    9 platforms

    Sales Analytics Dashboard Try demo →

    Live executive view of the sales ledger, built directly on Microsoft Dynamics 365 Business Central via OData v4. MSAL-secured, with runtime $metadata schema discovery so the application is immune to vendor entity-name drift across Business Central upgrades. Single-tenant, free-tier deployment.

    Business outcome: replaces the Power BI + Azure data-warehouse + ETL pipeline that would otherwise be required to give the leadership team a live read on sales performance.

    • JavaScript
    • MSAL OAuth 2.0
    • Business Central OData v4
    • Chart.js
    • XLSX.js
    • GitHub Pages

    Item Demand & Procurement Forecasting Platform Try demo →

    Statistical forecasting engine wired live to Business Central. Inventory demand and supplier purchasing volumes are modelled directly from the same operational ledger finance reports run on, so purchasing decisions reconcile to a single source of truth.

    Business outcome: replaces the subscription forecasting-SaaS category (Netstock/Slimstock tier) for inventory and supplier planning.

    • JavaScript
    • Business Central OData v4
    • Time-series forecasting
    • Chart.js
    • date-fns
    • CSV ingestion

    HR & Workforce Portal Try demo →

    Contractor onboarding, time capture, payroll self-service, and an auditable leave-accrual ledger with full transaction history. Firebase Authentication and Firestore Security Rules calibrated to organisational policy.

    Business outcome: replaces the workforce-management SaaS tier the business otherwise would have subscribed to.

    • Firebase Authentication
    • Firestore
    • Firestore Security Rules
    • JavaScript
    • GitHub Pages

    Calendar & Quoting Operating Surface Try demo →

    Office-wide view aggregating the team's Outlook calendars through Microsoft Graph and overlaying them with live quoting context. Single-tenant architecture refreshed on a scheduled cadence via GitHub Actions.

    Business outcome: one operating view where team availability and commercial pipeline intersect, replacing the manual stitching across calendar tools and quote spreadsheets.

    • Microsoft Graph API
    • Microsoft Identity / MSAL
    • Firebase
    • GitHub Actions
    • JavaScript

    Productivity & Performance Analytics Try demo →

    Nine-view analytics suite instrumenting team productivity, error taxonomy, and performance trends: the evidence base for continuous-improvement reviews and the quarterly business-reporting schedule.

    Business outcome: makes operational performance legible at the resolution executives need but rarely receive.

    • JavaScript
    • Chart.js
    • Firestore

    Three-Way Financial Forecast Try demo →

    Driver-based three-statement model (profit & loss, cash flow, balance sheet) used as the analytical basis for ongoing NAB facility reviews.

    Business outcome: supports management decisions, scenario analysis, and banking discussions through a single in-house forecasting framework, removing dependence on external modelling.

    • Financial modelling
    • Cash-flow & working-capital architecture
    • Sensitivity & scenario design

    bc-library | Business Central Client SDK

    The integration spine beneath every internal application. A JavaScript SDK that gives the company's tools unified, MSAL-authenticated OData v4 access to Microsoft Dynamics 365 Business Central, with runtime $metadata schema discovery so each downstream application resists vendor version drift across upgrades.

    Business outcome: one integration layer underneath every platform: eliminates duplicated MSAL/OData code across applications and removes per-app maintenance from each Business Central release cycle.

    • JavaScript
    • MSAL
    • OData v4
    • Runtime schema introspection
    • SDK architecture

    HVAC Estimator Platform

    Full-stack estimation platform combining PDF drawing takeoff, vision-based component detection, labour-hour calculation to Australian HVAC standards (NCC/BCA, AS 1668, AS 4254), quote revisioning, and Business Central interoperation.

    Business outcome: targets quoting-cycle compression from hours to minutes, with consistency and traceability across revisions.

    • Node.js
    • Express.js
    • React.js
    • MongoDB
    • Tesseract.js
    • Google Cloud Vision API
    • PDF-Parse
    • JWT
    • Docker

    PDF-Driven HVAC Takeoff Automation

    Three-generation research programme exploring three successive architectures for extracting duct geometry from mechanical drawings: vector-geometry traversal with OCR; drafter-assisted polyline interpretation; and annotation-driven extraction. A parallel line of work (DimensionX) explores pure vector measurement in the absence of OCR.

    Business outcome: establishes the technical pathway to automated estimation workflows and a step-change in quoting throughput.

    • Python
    • PyMuPDF
    • RapidOCR
    • Shapely
    • NetworkX
    • Flask
    • Streamlit
    • PDF.js
    • Graph algorithms