- 1. When it’s just you and a couple of engineers…
- 2. …not everything has to rest on your shoulders
- 3. Run the business between jobs
- 4. Everything an engineer needs in the field, in one app
- 5. Less chasing, cleaner accounts
- 6. See how other engineer-led businesses use GES
- 7. 100% Heating Ltd
- 8. See all customer stories
- 9. ALL-IN-ONE SOFTWARE
- 10. Run your business from one place
- 11. FREE 14-DAY TRIAL
- 12. Get your team set up in minutes
- 13. Frequently asked questions
- 1. When it’s just you and a couple of engineers…
- 2. …not everything has to rest on your shoulders
- 3. Run the business between jobs
- 4. Everything an engineer needs in the field, in one app
- 5. Less chasing, cleaner accounts
- 6. See how other engineer-led businesses use GES
- 7. 100% Heating Ltd
- 8. See all customer stories
- 9. ALL-IN-ONE SOFTWARE
- 10. Run your business from one place
- 11. FREE 14-DAY TRIAL
- 12. Get your team set up in minutes
- 13. Frequently asked questions
GES FOR ENGINEER-LED BUSINESSES
For the gas engineer that’s gone from one van to a full team
Keep your jobs on track, your engineers in the know, and your paperwork in one place. If you’re still on the tools while running the business, GES helps you go from first booking to final payment without all the stress and hassle.
- Add your team in minutes
- Works offline
- Free demo & onboarding
Built for the owner on the tools
When it’s just you and a couple of engineers…
You might get some admin help, but there’s no full-time office manager to catch what slips. You’re quoting from the van, booking the next job between call-outs, and doing the invoicing at night.
GES pulls it together so everything stays on track and you get your evenings back.
…not everything has to rest on your shoulders
"I'm constantly booking jobs while I'm working for other customers"
Take the call, add it to GES from your phone, and assign it to an engineer. No chaos, no miscommunication.
"I never know who's free or where they are"
One shared calendar shows every engineer's day at a glance, so you can send the right person to the right job.
"Paperwork and invoicing eat my evenings"
Certificates go out in the field, quotes become invoices in a tap, and reminders book you repeat business.
GES HELPS YOUR WHOLE TEAM
Run the business between jobs
When you're the owner and still on the tools, there's no office manager to catch what slips. Gas Engineer Software gives you one live view of the business from wherever you're working.
Book the next job, see who's free, and know what's been done and what's still owed, all without heading back to the office.
Book & assign work from your phone
Take the call on-site, create the job and drop it onto an engineer's calendar there and then.
Learn more about schedulingAssign engineerChoose engineerFull visibility of jobs & engineers
One shared, real-time calendar shows every engineer's day and the status of every job.
Learn more about schedulingToday's scheduleWed 13/05You09:00Boiler service · Patel13:00Gas safety · OkaforPeter08:30Breakdown · Bell11:30Landlord cert · AllenTom10:00Install · Friday14:30Service · WhitakerFaster invoicing, faster cash flow
Turn a completed job into an invoice in a tap and take payment through a link, so money comes in sooner.
Learn more about invoicingInvoice #INV-2088PAIDBoiler service£89.00Magnetic filter (supply & fit)£205.00VAT (20%)£58.80Total paid£480.00Paid by link · Crezco View paymentSteady repeat business from reminders
Automated service reminders bring customers back each year on their own, filling your diary.
Learn more about remindersService remindersMay 2027SWMrs S. Whitaker14 MayJPMr J. PatelReminder sent
Everything an engineer needs in the field, in one app
Your engineers get their schedule, job notes, and paperwork on one app, so they can do their best work with less hassle.
Paperwork is filed away automatically, schedules update on their own, and everything they need is in the app.
Quick, easy & professional certificates
Create and issue every gas and oil certificate from the app on-site, even with no signal.
Learn more about records & certificatesISSUEDLandlord Gas Safety (CP12)14 Beech Lane · Cert No. GS-4291ApplianceWorcester 30SiOperating pressure21 mbarCO reading12 ppmFlue testPassSigned by A. Kelly · Gas Safe 591234 · sent to customerInstant access to job histories, notes & schedules
Every job note, customer detail and past visit is on the app, so engineers turn up knowing exactly what they're walking into.
Learn more about job managementLWMrs L. Whitaker14 Cromwell Road, Bristol BS6 5HXJob notesBoiler's in the loft — take the long ladderDave R. · 12/03/25Gate code 4821 · dog in the gardenOffice notePrefers morning visitsCustomer preferenceBoiler manuals & AI assist
Over 2,300 boiler manuals in the app, plus an AI assistant that finds what you need in seconds.
Learn more about boiler manualsVaillant eco2,300+ manualsPDFVaillant ecoFIT Pure 830AI Assist: On the ecoFIT Pure, error F.22 means low water pressure — top up to 1–1.5 bar via the filling loop. ecoFIT Pure 830 (p.61)Heating tools & calculators
Everyday tools like the gas rate and pipe sizing calculators are built into the app.
Learn more about heating toolsGas Rate CalculatorNatural Gas · M3Initial reading2841.50Final reading2841.57GAS RATE2.10m³/hrGROSS22.6kWNET20.4kW
Less chasing, cleaner accounts
Whether it's you, a partner, or a part-time hire who keeps the books, GES takes the manual work out of getting paid. Invoices and payments flow straight into your accounting software, and reminders do the chasing for you.
Invoices & payments synced to Xero, QuickBooks or Sage
Your invoices, customers and payments sync straight into your accounting software.
Learn more about integrationsAccounting syncXeroQuickBooksSageMrs L. WhitakerInvoice #INV-2043 ·£94.00Payment received ·£94.00Synced to XeroDigital payment links customers can pay through
Send a payment link or QR code with the invoice so customers can pay in a couple of taps.
Learn more about invoicing & paymentsGet paidAmount due · #INV-2043£94.00Pay nowScan to payAutomatic payment reminders
GES chases overdue invoices for you, so you spend less time asking to be paid.
Learn more about payment remindersPayment remindersJP9 days overdueMr J. PatelInvoice #INV-2088Amount outstanding£612.00Reminder2nd chaseReminder sent automaticallyEvery customer and record in one place
All your customer details, jobs and history are stored together and searchable.
Learn more about customer managementCustomers 1,284 totalSearch name, postcode or phone…LW6 jobsMrs L. WhitakerBristol BS6JP3 jobsMr J. PatelLondon SE1SL12 jobsSherwood LettingsNottingham NG1
See how other engineer-led businesses use GES
"Three years after we went onto the software, my company tripled in size. The team tripled, and my revenue tripled."
Other teams using GES:
ALL-IN-ONE SOFTWARE
Run your business from one place
From creating gas certificates to keeping a detailed customer history, GES helps everyone in the business save time and work smarter.
SCHEDULING & CALENDAR Book in jobs for engineers
Manage every job and engineer in one shared, real-time schedule.
CRM software Manage customer details
Keep every customer detail tidy and in one searchable place, including a full history.
GAS CERTIFICATES Create gas certs on the mobile app
Every gas industry certificate, in one app, for every job.
Invoicing Get paid faster and with less hassle
Convert quotes to invoices with easy, low-fee digital payments.
Quoting Build professional quotes on the fly
Build winning quotes in minutes with reusable template line items for all your common jobs and parts.
Automated Reminders Fill your diary with repeat business
Customise your service reminder template once, then let GES do the rest.
FREE 14-DAY TRIAL
Get your team set up in minutes
GES helps you run your business and save hours coordinating your team.
- Add your team during the free trial
- Create and assign jobs
- Free onboarding call included
- No credit card required
Frequently asked questions
Got a question we haven't covered? Talk to our team.
Is Gas Engineer Software right for a small team of 2-5?
Yes, it's built for exactly this stage. When you've grown past working on your own but don't have an office behind you yet, GES puts your shared calendar, certificates, quoting and invoicing in one place, so you can run the business from the field. It's simple enough to pick up without any training, and you can add your engineers and try it on real jobs during the free 14-day trial.
Can I book and assign jobs to my engineers from my phone?
Yes. You can take the call, create the job and drop it onto an engineer's calendar straight from the app while you're on-site yourself. They'll see it on their phone with the address, customer details and any notes attached. Learn more about scheduling here.
Does each engineer need their own licence?
Each person on your team gets their own login, so your engineers can all work in the app at the same time, each seeing their own jobs out in the field. You add a user for every engineer, and add more as the team grows. During the free 14-day trial you can add your whole team and try it out on real work before you decide.
Will my engineers actually use it if they're not techy?
If they can use WhatsApp, they can use GES. The app is designed for people who are busy and on-site, not sat at a desk, so most engineers are up and running the same day. Every new team also gets a free onboarding call to make sure everyone's set up from the start.
Can I control what each engineer can see and edit?
Yes. Permissions let you decide what each person can access, so engineers only see the jobs relevant to them and can update those, while you keep full oversight of the whole business. It's the same system that scales as you take on more people. Learn more about team management here.
What happens if I lose signal on-site?
The app works offline. You can still see your schedule, open jobs and fill out certificates in a basement or out at a rural property with no signal. Everything saves to your device and syncs automatically the moment you're back online, so nothing gets lost.
Does it work with my accounting software?
Yes. GES integrates with Xero, QuickBooks and Sage, so your invoices, payments and customers sync across automatically instead of being re-typed by hand. You can also send customers digital payment links so they can pay you quickly. See all integrations here.
We're moving from paper or another app. Is it hard to switch?
No. Whether you're coming off paper pads or another app, our UK-based team will help import your customers and records during onboarding, so you're not starting from scratch. Most small teams are fully switched over within a day or two, without disrupting the work.