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  • About us
    • About the IES

    • The IES Family

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  • Analysis, Guidance & Policy
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Institute of Air Quality Management

Supporting excellence and technical competence in the air quality profession

Collaborating for clean air

The Institute of Air Quality Management (IAQM) is a member-led organisation within the IES family supporting excellence and technical competence in the air quality profession. As the authoritative voice for air quality professionals in the UK, the IAQM develops sector-leading technical guidance to support a robust, science-based approach to improving air quality. They collaborate with other environmental specialisms as part of the wider IES family, fostering interdisciplinary solutions to air quality challenges. 

The IAQM’s mission is to empower air quality professionals across sectors by providing a supportive community that fosters knowledge exchange, professional development, and advocacy for clean air.

Visit the IAQM website Follow IAQM on LinkedIn

The pre-eminent organisation for Air Quality professionals

IAQM has competency-based membership levels that recognise and signal the expertise and commitment of their members to continuous professional development (CPD). IAQM membership grades mirror the IES grades, ranging from Affiliate to Fellow, providing support at all stages of a person’s career. The IAQM has a dedicated Early Careers Network, which provides tailored support for those at the start of their career.

By joining the IAQM, members become part of a dynamic community dedicated to delivering clean air and creating a healthier, more sustainable world. 
 

Explore IAQM Membership

Starting your air quality journey?

Connect with other professionals in our Early Career Network

The IAQM Early Careers Network

Highlights from the IAQM

Many kites in the air at the Washington State International Kite Festival at Long Beach
Conference
21 Oct 2026 08:30 am to 22 Oct 2026 05:15 pm UTC

Routes to Clean Air 2026

Unused urban brownfield site with open land covered in cracked overgrown concrete awaiting development in Leeds
Community Latest
Tue, 30 June 2026

Insights Article - PFAS in air: extending brownfield air quality practice into a new phase

Man looking at the twilight sky with a telescope
Community Latest
Tue, 15 September 2026

Launch of air quality professional development resource

View All

Committee Members

Claire Holman
Claire Holman
IAQM President
Claire Holman

Claire Holman

IAQM President
Claire Holman is an air quality specialist with more than 40 years’ experience spanning science, policy, consultancy and academia. Her PhD focused on ozone formation in the troposphere. She is a Director of Kalaco, a specialist air quality and meteorology consultancy, and a Visiting Professor at the University of the West of England (UWE). She is a former Chair of the IAQM has led the development of several IAQM guidance documents, and has extensive experience as an expert witness.
Sarah Horrocks
Sarah Horrocks
IAQM Chair
Sarah Horrocks

Sarah Horrocks

IAQM Chair
Sarah is Head of Air Quality & Emissions at AtkinsRéalis. Sarah has worked on hundreds of air quality impact assessments, monitoring surveys, health risk assessments and environmental audits serving a wide range of markets. She is specialised in the field of air dispersion modelling for both industrial sources and transport studies. She is a Fellow of the Institute of Air Quality Management (IAQM) and a Council Member of the IES.
Kieran Laxen
Kieran Laxen
IAQM Vice Chair
Kieran Laxen

Kieran Laxen

IAQM Vice Chair
Kieran is an air quality specialist with two decades’ experience in consultancy, with expertise in air quality, meteorology and climate change. He serves on air quality advisory committees for the Welsh and Scottish Governments. He is the founder of Kalaco, a specialist air quality, meteorology and climate change consultancy, and has played an active role in IAQM work for over a decade. Kieran has acted as an expert witness in planning inquiries, hearings, and a Parliamentary inquiry.
Helen Venfield
Helen Venfield
IAQM Vice Chair
Helen Venfield

Helen Venfield

IAQM Vice Chair
Helen is Associate Director in the Air Quality & Environment Group at Bureau Veritas, with over 20 years of industry expertise spanning research, work for central and local government departments, and private development air quality impact assessments. Her PhD focused on biogenic volatile organic compounds and air quality impacts. She specialises in air quality assessments for Habitats Regulations Assessments across UK Local Plans, with particular interest in road traffic ammonia emissions.
Anil Namdeo
Anil Namdeo
IAQM Committee Member
Anil Namdeo

Anil Namdeo

IAQM Committee Member
Anil is Professor of Air Quality and Net Zero in the Department of Geography and Environmental Sciences, Northumbria University. He is a Chartered Environmentalist, a Chartered Scientist, and a Fellow of the Royal Meteorological Society and IAQM. He is a Commissioner on the Global Commission on Healthy Indoor Air, and a member of the International Society of Indoor Air Quality and Climate (ISIAQ). Anil has research interests in air quality (monitoring, modelling and management) and health.
Annie Danskin
Annie Danskin
IAQM Committee Member
Annie Danskin

Annie Danskin

IAQM Committee Member
Annie Danskin has 27 years of experience in the field of air quality consultancy, project management, training and research and was awarded Chartered Environmentalist status in 2021. She has prepared expert witness reports and frequently presented at public consultation events, planning hearings and conferences/user group meetings.
Carl Hawkins
Carl Hawkins
IAQM Committee Member
Carl Hawkins

Carl Hawkins

IAQM Committee Member
Carl started work at ERM as an ecologist, AQ consultant and then in EIA. As a freelancer since 2000, he has worked for many clients, including Arup, Shell, EBRD, World Bank and Kent. He has worked in transport, infrastructure, power, oil & gas, cement, food and waste-to-energy and in over 50 countries. He has been an IAQM member since its formation, a committee member for over 10 years, and has contributed to much of IAQM’s guidance.
Chloe Fellows
Chloe Fellows
IAQM Committee Member
Chloe Fellows

Chloe Fellows

IAQM Committee Member
Chloe is Founder and Director of Haze Environmental, an air quality and odour consultancy based in Worcestershire. She has 20 years’ experience delivering impact assessments, monitoring surveys and dispersion modelling for major infrastructure and local development projects. Chloe holds a Master’s in Air Pollution Management and Control and sits on the IAQM Committee, promoting best practice, healthier places and greater visibility for women in the environmental sector.
Chris Rush
Chris Rush
IAQM Committee Member
Chris Rush

Chris Rush

IAQM Committee Member
Chris is Head of and Director of Climate, Air & Noise at Pegasus Group. His expertise expertise covers planning, noise and air quality, specifically in relation to residential developments, industrial fixed installations and transportation environmental impact on developments including air traffic. Chris is a CEnv. He was Chair of the IAQM Committee from 2023 to 2025.
Daniel Marsh
Daniel Marsh
IAQM Committee Member & EDI Champion
Daniel Marsh

Daniel Marsh

IAQM Committee Member & EDI Champion
Daniel is part of the aerosol science team at the Environmental Research Group, Imperial College London, specialising in the control of dust and emissions from construction and demolition. He is the programme manager for the Centre for Low Emission Construction, which aims to raise awareness of the air quality impacts from the construction industry.
Davide Pascarella
Davide Pascarella
IAQM Committee Member
Davide Pascarella

Davide Pascarella

IAQM Committee Member
Davide is an Air Quality Lead Officer at the RSP (Regulatory Services Partnership), serving the London Boroughs of Merton, Richmond upon Thames, and Wandsworth. He has >15 years of experience in the public sector and expertise in Local Air Quality Management, policies and regulations. His work has covered a broad range of projects, including managing monitoring networks, demolition and construction activities, writing bidding proposals and reviewing air quality assessment reports.
Jamie Clayton
Jamie Clayton
IAQM Committee Member
Jamie Clayton

Jamie Clayton

IAQM Committee Member
Jamie is an air quality consultant with approximately 15 years’ experience in the consultancy sector. Jamie has a wealth of expertise relating to air quality assessment for both public and private sector clients, linked to both road traffic and industrial sources. He has assumed the role of lead developer of Defra’s Emissions Factors Toolkit since 2016; additionally, he has project managed the UK Urban NO2 Network (UUNN) since the network's inception in 2020.
Jessica Muirhead
Jessica Muirhead
IAQM Committee Member & EDI Champion
Jessica Muirhead

Jessica Muirhead

IAQM Committee Member & EDI Champion
Jess is an Associate Director at Air Quality Consultants (Part of Logika Group). She has worked on numerous air quality assessments ranging from small planning applications to large Development Consent Orders (DCOs) across London and the UK, with a focus on road transport emissions. She is a Member of the Institute of Air Quality Management (IAQM) and a Chartered Scientist.
Noel Nelson
Noel Nelson
IAQM Committee Member
Noel Nelson

Noel Nelson

IAQM Committee Member
Noel Nelson was an air quality scientist at the Met Office and was one of the founding members of the IAQM. He has worked at the Met Office for over 30 years, with a wide range of experience encompassing air quality modelling, weather and health relationships and some climate change impacts. He has served as IES Chair and is now an IES Vice President.
Mark Nichols
Mark Nichols
IAQM Committee Member
Mark Nichols

Mark Nichols

IAQM Committee Member
Mark Nichols is an Associate (Air Quality) at Ardent, supporting private sector (planning and EIA) and public sector (monitoring and policy development) clients. He has a background in Environmental Management, with a BSc and MSc in this field. He has been a member of the IAQM since 2018, and has been on the IAQM early career network committee since 2020. He is Vice Chair of the ECN.

Community Coordinator

Ethny Childs
Ethny Childs
Head of Communities & Partnerships
Ethny Childs

Ethny Childs

Head of Communities & Partnerships
Ethny is responsible for managing the IES Communities within the IES family and is the Community Coordinator for the Climate Action, EIA, FWR, Land Condition and IAQM Communities. She also leads on IES partnerships, including the IES's work on interdisciplinary collaboration. She sits on the Board for SiLC, and was previously on the advisory panel for the Media Trust's Communicating Climate Programme and Equator programme. She has been recognised on the ENDs Power List and Environment100 list.

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