Role

Building Services Engineer

Designs building systems like HVAC, plumbing, and power to meet comfort and safety requirements.

11 chaptersAbout 2–3 months15–30 min a day10 skills2 projects
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Chapter 1 is free. No card needed.

Day 1 on the Building Services Engineer path.

What a Building Services Engineer does

Designs and improves building systems like heating, cooling, water, and power so people stay safe, comfortable, and buildings run efficiently.

  • Design HVAC, plumbing, drainage, and electrical layouts for new or renovated buildings
  • Calculate heating and cooling loads and size equipment, ducts, pipes, and cables
  • Create drawings, specifications, and schedules for contractors to build from
  • Coordinate with architects and structural teams to fit systems into the building
  • Review designs for safety, codes, energy use, and maintainability
  • Inspect sites during construction to answer questions and resolve clashes
  • Test and commission systems to confirm performance matches the design
  • Troubleshoot comfort, noise, air quality, and reliability issues in existing buildings

A day in the life

  1. Review project plans, client needs, and code requirements, then plan design tasks
  2. Model loads and select equipment, then update drawings and specifications
  3. Meet with other disciplines to resolve clashes and agree on changes
  4. Answer contractor questions and check site progress against the design
  5. Document decisions, update calculations, and prepare for the next review

Tools you will use

CAD and BIM: AutoCAD, RevitLoad calculations: IES VE, HAPSpreadsheets: Excel, Google SheetsDocumentation: Word, Google DocsIssue tracking: Jira, TrelloTest instruments: multimeter, airflow meter

Your plan

Chapter by chapter.

1~1 wk

See what building services engineer work involves

StartFree
2~1 wk

Analytical and critical thinking

Skills
31–2 wks

Size heating, cooling, and fresh air for a floor plan

Proof
4~1 wk

Meet people who do building services engineer work

People
5~1 wk

Sustainability and compliance

Skills
6~1 wk

Building knowledge and documentation

Skills
7~1 wk

Communication and collaboration

Skills
81–2 wks

Make fire safety concept and code compliance checklist for a small school

Proof
9~1 wk

Practise role interviews

Interview
10~1 wk

Choose a route into building services engineer work

Decide
11on your timeline

Apply for roles

Apply

By the last chapter

This is what you can show.

Things you've made

HVAC load estimate and Fire safety concept and code compliance checklist for a small school

Skills you can prove

10 skills, each rated on work you actually did.

People you've talked to

3 people who do the job, with a message ready for each.

Questions you can answer

20 interview questions and a mock interview, with feedback.

Credentials

9 credentials compared, so you can pick one, or decide you don't need one. None is required.

Ways in

There is more than one route.

Ways to study

  • Bachelors degree in mechanical engineering, electrical engineering, or building services engineering
  • Diploma or higher diploma in building services, HVAC, or electrical building systems
  • Graduate conversion program focused on building systems and energy design
  • Apprenticeship style training with day release plus on-the-job site experience

How people get their first job

  • Apply for building services or MEP design internships with engineering consultancies
  • Start as a CAD or BIM technician supporting MEP drawings and coordination
  • Join a contractor as a site engineer trainee to learn installation and commissioning
  • Earn an entry energy modeling or HVAC design certificate and build a small portfolio
  • Volunteer on a community building retrofit to practice surveys and basic calculations

Life skills on this path: Networking · Job interviews · Job search

How the work is changing

What AI is doing to this role

How AI is changing this role · one of 6 tasks we track

Size HVAC, plumbing, and electrical systems

Sped up a lot

What AI does

Revit MEP and IES VE size ducts, pipes and cables in minutes.

Still yours

Smoke ventilation and odd buildings still need your judgement.

Reviewed September 2026

In the app · Premium

The rest is in the app

  • How AI affects the other 5 tasks
  • Whether this job is growing or shrinking
  • How hard the first job is to get
  • Similar roles that are easier to get into
  • Updated every month, with sources
See it in the app →

How we rate a job →

Already working

Already a Building Services Engineer?

Plan your move to Senior Building Services Engineer: 8 chapters that end with a strong case for your next review.

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Questions

Questions about this path

How long does it take to become a building services engineer with Welica?

The path is 11 chapters, 2–3 months at 15 to 30 minutes a day. You can go faster or slower; the plan moves with you.

Do I need a degree?

Not always. Common routes are bachelors degree in mechanical engineering, electrical engineering, or building services engineering, diploma or higher diploma in building services, HVAC, or electrical building systems, graduate conversion program focused on building systems and energy design, or apprenticeship style training with day release plus on-the-job site experience.

What is free?

Chapter 1, See what building services engineer work involves, is free for good. Premium unlocks the rest of the path.

Start the Building Services Engineer path.

Chapter 1 free. About 15 to 30 minutes a day.

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