Niamh O'Sullivan
Brentford,United Kingdom
Summary
Results-oriented Reporting Manager specialising in data analysis and strategic planning. Proven track record in leading teams to ensure precise and timely reporting. Dedicated to fostering operational enhancements and promoting data-driven decision-making. Strong background in stakeholder engagement and governance, aiming for impactful sustainability initiatives.
Overview
8
8
years of professional experience
4
4
years of post-secondary education
1
1
Certification
Work history
ESG REPORTING MANAGER
ISS UK
London
01.2025 - 01.2026
- Lead the delivery of ESG reporting and carbon disclosure across the UK business, acting as the primary subject matter expert for environmental sustainability, climate reporting, and regulatory compliance.
- Own verification, governance, and assurance of Scope 1, 2, and 3 greenhouse gas emissions data, ensuring audit readiness and alignment with UK and EU reporting standards.
- Deliver statutory sustainability reporting, including Streamlined Energy and Carbon Reporting (SECR) and Office for National Statistics (ONS) submissions, meeting fixed regulatory deadlines.
- Design and implement ESG reporting frameworks, processes, and internal controls to improve data quality, transparency, and consistency across multiple operational sites.
- Lead cross-functional collaboration with Global Climate teams, finance, procurement, and operations to embed ESG requirements into business planning and decision-making.
- Act as a central liaison point for internal and external stakeholders on ESG performance, disclosures, and sustainability strategy, ensuring consistent communication and organisational alignment.
- Support continuous improvement of ESG performance by identifying risks, opportunities, and performance gaps through robust data analysis.
GLOBAL ZERO WASTE ADVISOR
ISS UK
London
03.2024 - 01.2025
- Led zero waste and circular economy delivery across global client accounts, acting as subject matter expert and strategic advisor to operational teams, supply chain partners, landlords, and clients.
- Owned waste and circularity data governance, improving data collection, standardisation, and quality to support performance monitoring and decision-making.
- Analysed waste streams and end-of-life pathways to identify reduction, reuse, and recycling opportunities, driving progress towards zero waste to landfill targets.
- Led and coordinated zero waste audit and assurance programmes, liaising with external certification bodies and managing audit preparation, evidence collation, and compliance.
- Conducted internal quarterly performance audits across multiple sites and geographies, tracking corrective actions and continuous improvement.
- Developed and delivered client-facing engagement and behaviour change initiatives to support waste reduction and circular economy adoption.
- Worked closely with the Global Zero Waste Strategy Lead to align site-level delivery with global sustainability objectives and reporting requirements
ASSISTANT SUSTAINABILITY AND ENVIRONMENTAL ADVISOR
ABM UK
London
03.2022 - 03.2024
- Develop and deliver on-going approved Waste Duty of Care, Sustainability and Environmental awareness training to meet client, project, and business needs, and deliver toolbox talks schedule and briefings for operational team deployment.
- Contribute to local and national Sustainability Projects and ESG Working Groups (e.g., Community Engagement Plans, Sustainability Innovation Plans).
- Engage with site teams to identify best practice environmental/sustainability activities providing improved Sustainability outcomes. Including tailoring site-specific waste strategies and tenant engagement plans.
- Engaged in sustainability site audits to analyse environmental performance and recommend improvements.
- Maintained ISO 14001 and ISO 50001 standards, ensuring environmental and energy management systems were effectively integrated into daily operations.
- Support the Sustainability Manager to maintain the compliance register of sustainability and environmental protection legislation.
- Assist the Sustainability Manager in the provision of Environmental and Sustainability KPIs in the business through the support of data collection activities to ensure accurate analysis to monitor performance against agreed department and corporate sustainability indicators.
- Assumed full managerial duties during the absence of the manager due to extended sick leave, effectively overseeing, and directing team operations, decision-making, and workflow management.
- Provide extensive ESG (Environmental, Social, and Governance) expertise and support to the bid team, facilitating comprehensive understanding and integration of ESG principles into bid proposals. Deliver engaging presentations on ESG-related aspects to stakeholders, enhancing bid quality and demonstrating commitment to sustainability practices.
- Managed Streamlined Energy and Carbon Reporting (SECR) compliance for ABM, overseeing the accurate and timely submission of reports in accordance with regulatory requirements. Responsibilities included data collection, analysis, and coordination with relevant stakeholders to ensure seamless adherence to SECR guidelines.
EHS Administrator
HM&V Engineering
Limerick
06.2019 - 08.2019
- Supported environmental, health, and safety administration, data tracking, and compliance activities within an engineering environment.
Environmental Scientist
Irish Cement
Drogheda, Louth
01.2018 - 08.2018
- University Placement, supported environmental monitoring, compliance, and data analysis activities within an industrial manufacturing setting.
Education
Bachelor of Science - Environmental Science
University of Limerick
09.2015 - 06.2019
Skills
- Sustainability Programme Leadership & Delivery
- Multi-Stakeholder & Government Engagement
- Environmental Sustainability & Carbon Management (Scopes 1–3)
- ESG Reporting, Monitoring & Impact Evaluation
- Sustainability Governance & Working Group Leadership
- Social Sustainability, Inclusion & Community Impact
- Sustainability Advocacy & Behaviour Change
- Organisational Culture Change & Sustainability Champion Networks
Certification
ISEP Affiliate Member
References
References available upon request.
Timeline
ESG REPORTING MANAGER
ISS UK
01.2025 - 01.2026
GLOBAL ZERO WASTE ADVISOR
ISS UK
03.2024 - 01.2025
ASSISTANT SUSTAINABILITY AND ENVIRONMENTAL ADVISOR
ABM UK
03.2022 - 03.2024
EHS Administrator
HM&V Engineering
06.2019 - 08.2019
Environmental Scientist
Irish Cement
01.2018 - 08.2018
Bachelor of Science - Environmental Science
University of Limerick
09.2015 - 06.2019