Green IO London 2025
September 23 to 24, 2025
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Apidays

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Green IO London 2025

Good for business, Good for the Planet?

Green IO is where technology leaders tackle their own sustainability challenges. Through practical use cases and expert talks, Green IO London 2025 will dive deep into the mutual benefits and limits ...

date conference September 23 to 24, 2025
adress conference etc. venues 155 Bishopsgate, London EC2M 3YD
GreenIO Conference - Green IO London 2025
20 speakers
300 Attendees
8 countries

Agenda

The complete agenda is now live! You can view it below.

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All Cloud Software Engineering
  • Day 1 (Workshop Day)

    Tuesday 23rd September 2025

    14:00 to 14:25
    Workshop
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    Data-driven decisions that maximise Cloud and AI sustainability. A GreenOps deep dive by engineers, for engineers and CTO's

    See what is behind the technology that enables customers like Mastercard cut hundreds of MtC02 and reduce spend by miliions of dollars. Focus on coverage for AI - proactive data-driven actions to deal with the tsunami of cost and GHG emissions. Plus, best practice use of ISO 14064 GHG data in the platforms that engineers, FinOps practitioners and IT Sustainability teams use.

    In collaboration with

    speaker Greenpixie
    14:25 to 14:50
    Workshop

    ICT & cloud footprint data at scale: an API for digital sustainability through LCA

    This workshop introduces participants to Resilio DB an industry-leading footprint database forLife Cycle Assessment (LCA) of digital product & services. Designed to overcome the challenges ofperforming LCAs at scale Resilio DB API provides reliable & easy to use consistent footprint data for the ICT sector. Participants will first explore the web UI before gaining hands-on experience with the REST APIendpoints through a guided Postman collection. You'll learn how to leverage Resilio DB tosearch and assess various digital devices from servers/VMs to end-user devices or customconfigurations.

    In collaboration with

    speaker Resilio
    14:50 to 15:15
    Workshop

    Aguaro's workshop: Title TBA

    In collaboration with

    speaker Aguaro
    15:15 to 15:40
    Workshop
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    DWP Digital's digital sustainability 90 day roadmap

    Digital sustainability is moving up the agenda but often feels complex or overshadowed by other priorities. Climate Fresk workshops have been effective for raising awareness, yet many participants struggle to translate insights into practical steps. To bridge this gap, we designed a 90-minute plug-in for the Action phase, using a card-based digital product lifecycle. Teams map sustainability directly to their projects, explore practical choices, and identify co-benefits like lower costs or improved user experience. The session ends with three clear commitments, making change both tangible and trackable. Feedback has been consistently positive, showing this approach helps embed sustainability into everyday digital work.

    In collaboration with

    speaker DWP Digital
    15:40 to 16:05

    Coffee Break & Networking

    16:05 to 16:30
    Workshop
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    Buying and selling sustainable SaaS and IaaS products

    16:30 to 16:55
    Workshop
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    App growth meets infra reality: The GreenOps advantage

    In collaboration with

    speaker Sopht
    16:55 to 17:20
    Workshop

    MIKUJY workshop : Title TBA

  • Day 2 (Conference Day)

    Wednesday 24th September 2025

    09:30 to 09:55
    OPENING REMARKS
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    In praise of the question mark: a journey from Descarte to ChatGPT

    09:55 to 10:20
    Keynote
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    Forget SkyNet, will the energy consumption of AI destroy humanity? What can developers learn from Sarah Connor?

    10:20 to 10:45
    Keynote
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    Our digital sustainability journey at HSBC

    10:45 to 11:15

    Coffee Break & Networking

    11:15 to 11:40
    Talk
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    Good for the Planet, good for the wallet: how AI can heat our water

    11:40 to 12:05
    Talk
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    Sustainable CI/CD: shifting compute tasks where CO2 intensity is the lowest

    12:05 to 12:30
    Talk
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    Mastercard are saving millions of dollars and hundreds of MTC02. Now it is time for UK-driven success.

    How to Unlock the Double-Wins of Cloud Sustainability. Using real-life case-studies, this session explores how enterprise cloud users can deliver cloud optimisation initiatives which deliver business value, driven by GreenOps data. This session will share UK and global use cases driven from the UK, including NTT Data and Cambridge University Press. This includes Sustainable AI, a rapidly growing pressure on cost and emissions targets.
    12:30 to 12:55
    Panel Discussion
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    Can networks and DC keep up with the AI boom? A 2030 discussion

    12:55 to 14:00

    Lunch Break & Networking

    BOOK SIGNING
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    Book Signing: "Building Green Software"

    14:25 to 14:50
    Talk
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    3 concrete success stories from DEFRA

    14:50 to 15:15
    Talk
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    Click, log in, carbon down: the sustainability journey of GOV.UK One Login

    Every click, login, and line of code carries a carbon cost — yet ICT emissions already exceed aviation and cement, and they’re rising fast. To meet Net Zero, digital sustainability must become a core principle, not an afterthought. In this session, Jennifer Marks, Head of Digital Sustainability at the Department for Science, Innovation & Technology, shares how GOV.UK One Login pioneered greener digital services. From developing a new emissions methodology to collaborating with startups and using data to drive cultural change, the team proved that even small shifts can deliver big impact. Join to hear candid insights, practical lessons, and how sustainability can stand alongside security and accessibility as a core requirement for digital government.
    15:15 to 15:40
    Talk
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    Climate change is here - using a systems thinking approach to keep NHS resilient

    15:40 to 16:05

    Coffee Break & Networking

    16:05 to 16:30
    Talk
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    How carbon.txt enables transparency across Tech companies

    In it Hannah will explain: - The problem this project addresses - the difficulty in finding and using sustainability data that is already published into the public domain. - The web-first, connect not collect approach that underpins how it works and how it is designed to be extended by default. - How people can get involved and contribute to what we’re doing
    16:30 to 16:55
    Talk
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    SCI for Web. How we applied the Software Carbon Intensity (ISO 21031) standard to the web

    16:55 to 17:20
    Talk
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    Green IT is good but it's not enough!

    17:20 to 17:30

    Closing remarks

    17:30 to 20:00

    Green IO Happy Hours

Meet the speakers

  • speaker Anne Currie

    Anne Currie

    Green Software Foundation
    Keynote

    Forget SkyNet, will the energy consumption of AI destroy humanity? What can developers learn from Sarah Connor?

  • speaker Natalie Pullin

    Natalie Pullin

    HSBC
    Keynote

    Our digital sustainability journey at HSBC

  • speaker Adam Newman

    Adam Newman

    Root and Branch
    Talk

    SCI for Web. How we applied the Software Carbon Intensity (ISO 21031) standard to the web

  • speaker Andri Johnston

    Andri Johnston

    Cambridge University Press and Assessment
    Talk

    Mastercard are saving millions of dollars and hundreds of MTC02. Now it is time for UK-driven success.

  • speaker Andy Westbrook

    Andy Westbrook

    NTT Data, Inc
    Talk

    Mastercard are saving millions of dollars and hundreds of MTC02. Now it is time for UK-driven success.

  • speaker Ben Tongue

    Ben Tongue

    NHS England
    Talk

    Climate change is here - using a systems thinking approach to keep NHS resilient

  • speaker Charlie Beharrell

    Charlie Beharrell

    Heata
    Talk

    Good for the Planet, good for the wallet: how AI can heat our water

  • speaker Claire Robinson

    Claire Robinson

    Transform
    Talk

    Climate change is here - using a systems thinking approach to keep NHS resilient

  • speaker Daisy Thomas

    Daisy Thomas

    Department for Business and Trade
    Panel Discussion

    Implementing Gov AI playbook: trade-off from the trenches

  • speaker Dryden Williams

    Dryden Williams

    CarbonRunner
    Talk

    Sustainable CI/CD: shifting compute tasks where CO2 intensity is the lowest

  • speaker Fiona MacNeill

    Fiona MacNeill

    Macknowlogist Ltd
    Talk

    Sustainable CI/CD: shifting compute tasks where CO2 intensity is the lowest

  • speaker Hannah Smith

    Hannah Smith

    Green Web Foundation
    Talk

    How carbon.txt enables transparency across Tech companies

  • speaker Ian Brooks

    Ian Brooks

    University of the West of England
    Talk

    Green IT is good but it's not enough!

  • speaker Ishmael Burdeau

    Ishmael Burdeau

    DWP Digital
    Panel Discussion

    Implementing Gov AI playbook: trade-off from the trenches

  • speaker Jennifer Marks

    Jennifer Marks

    Government Digital Service
    Talk

    Click, log in, carbon down: the sustainability journey of GOV.UK One Login

  • speaker Kevin Leslie

    Kevin Leslie

    Greenpixie
    Talk

    Mastercard are saving millions of dollars and hundreds of MTC02. Now it is time for UK-driven success.

  • speaker Lydia Tabbron

    Lydia Tabbron

    Department for Environment, Food and Rural Affairs
    Panel Discussion

    Implementing Gov AI playbook: trade-off from the trenches

  • speaker Magali Saúl

    Magali Saúl

    Sopht
    Workshop

    App growth meets infra reality: The GreenOps advantage

  • speaker Mark Bradley

    Mark Bradley

    Flexera
    Workshop

    Data-driven decisions that maximise Cloud and AI sustainability. A GreenOps deep dive by engineers, for engineers and CTO's

  • speaker Oliver Cronk

    Oliver Cronk

    Scott Logic
    Panel Discussion

    Can networks and DC keep up with the AI boom? A 2030 discussion

  • speaker Oliver Winks

    Oliver Winks

    Root & Branch
    Talk

    SCI for Web. How we applied the Software Carbon Intensity (ISO 21031) standard to the web

  • speaker Sarah Hsu

    Sarah Hsu

    Green Software Foundation
    BOOK SIGNING

    Book Signing: "Building Green Software"

  • speaker Steve Chinnery

    Steve Chinnery

    DWP Digital
    Workshop

    DWP Digital's digital sustainability 90 day roadmap

  • speaker Tom Parry

    Tom Parry

    Department for Environment, Food and Rural Affairs
    Talk

    3 concrete success stories from DEFRA

  • speaker Thomas Devlin

    Thomas Devlin

    DWP Digital
    Panel Discussion

    Implementing Gov AI playbook: trade-off from the trenches

  • speaker William Tinney

    William Tinney

    Greenpixie
    Workshop

    Data-driven decisions that maximise Cloud and AI sustainability. A GreenOps deep dive by engineers, for engineers and CTO's

  • speaker Sandra Sydow

    Sandra Sydow

    Green IO Master of Ceremony | Planet on Stage
  • speaker Gaël Duez

    Gaël Duez

    Green IO
    Workshop

    Buying and selling sustainable SaaS and IaaS products

... and more to come!

Meet our partners

Members of the London Green IT ecosystem as well as our corporate partners will be available to exchange with you on how to accelerate your digital sustainability journey.

Global Premium

Global Champion

CHAMPION

Global Non Profit

Non Profit

Why they attended our past London editions

“Great set of speakers with a shared passion to have a conscious awareness of a sustainable use of tech to have a real positive impact on people and planet”

Rob Price, Founder (Accelleo)

"Apidays London was a great conference, specifically the Green IO sustainability conference. Not something I have seen before but thought provoking and inspirational.”

Michala, Chief of Staff for SRE (Goldman Sachs)

Thank you Gaël DUEZ for hosting a fantastic conference. I loved participating and as a speaker I was grateful for the warm welcome from the audience. Additionally, I was able to make hugely valuable connections, which will no doubt be helpful to to meet our ambitious Carbon Zero targets at Cambridge University Press & Assessment. Can't wait for next year!!

Julie Dennis, CTO (Cambridge University Press & Assessment)
"The blossoming of tools and initiatives in greening IT is a heart-warming signal from the digital sector. More than ever sharing experience and insights is pivotal for actors to ramp-up their effort."

Gaël Duez

Green IO Founder
GreenIO Conference - Green IO London 2025

About Apidays

Apidays is the world's leading series of API conference. In today’s intricate digital landscape, APIs have emerged as powerful conduits for innovation, bridging the gaps and unlocking new realms of possibility.

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Join us at London

September 23 to 24, 2025

GreenIO Conference - Green IO London 2025
adress conference
September 23 to 24, 2025 etc. venues 155 Bishopsgate, London EC2M 3YD