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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

Weather station in the Arctic
Webinar
27 Aug 2026 12:30 pm to 01:15 pm Europe/London

Air quality and its ecological impacts: the case of nitrogen deposition

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

View All

Committee Members

Claire Holman
Claire Holman
IAQM President
Claire Holman

Claire Holman

IAQM President
Claire has worked in air quality for the past four decades. She is currently a director of Kalaco, a specialist consultancy. She is a former chair of IAQM, and an experienced expert witness for planning inquiries and litigation. She also led the development of a number of IAQM guidance documents.
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
IAQM Vice Chair

Kieran Laxen

IAQM Vice Chair
Kieran is a Director at Kalaco. Kieran has extensive experience in air quality assessments for residential and commercial developments, road schemes, waste management processes, industrial processes, power generation facilities, air quality monitoring and is a leading UK expert in the assessment of power generating facilities for both permitting and planning applications.
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 Namdeo is Professor of Air Quality and Net Zero in the Department of Geography and Environmental Sciences, Northumbria University, Newcastle. He is a Chartered Environmentalist and a Chartered Scientist. He is a Fellow of the Royal Meteorological Society, UK and a Fellow of the IAQM. Anil is a member of Department for Environment, Food and Rural Affairs (Defra) Air Quality Expert Group (AQEG) and a member of the UK’s Civil Aviation Authority’s Sustainability Panel.
Annie Danskin
IAQM Committee Member

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 was Chair of the IAQM Committee from 2023 to 2025. He is a Consultant and Head of Air Quality at Hoare Lea. His diverse portfolio of experience includes air quality assessments on a range of projects from initial site feasibility, through planning and development to construction and operation. He is a Chartered Environmentalist and has an MSc in Air Pollution Management and Control.
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
IAQM Committee Member

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.
Mark Nichols
IAQM Committee Member

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
Head of Communities & Partnerships

Ethny Childs

Head of Communities & Partnerships
Ethny is responsible for supporting the IES Communities and building relationships with partners and stakeholders in the sector. Ethny is also a Trustee for Charityworks, sits on the SiLC Board and holds positions on the Steering Groups for the Professional Bodies Climate Action Charter, the Equator Programme and the Media Trust's Communicating Climate Programme.

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