Sustainability, ESG & Climate Change Advisory ​


How we can help you

Our experienced team of advisors and our network of associates can provide you with a wide spectrum of advisory services relating to sustainability, ESG  (Environmental, Social, Governance) and climate change, to help your organisation understand, mitigate and manage its environmental, social and governance issues.

Our methodology and solutions are tailored to the requirements, industry and country of the client, in line with the most relevant standards and reporting frameworks. Through ongoing support, we can help your organisation excel in a robust and dynamic environment, with the ultimate goal being to help clients and their supply chains achieve net-zero greenhouse gas (GHG) emissions from their direct and indirect impacts.

Sustainability and ESG Advisory Services

Strategy Development & Implementation

Reporting, Assurance and Standards

  • Global Reporting Initiative (GRI)
  • UN Sustainable Development Goals (UN SDGs)
  • Disclosures Standards of the International Sustainability Standards Board (ISSB) of the IFRS Foundation
  • Task Force on Climate-Related Financial Disclosures (TCFD)
  • Carbon Disclosure Project (CDP) Questionnaires
  • Sustainability Accounting Standards Board (SASB)
  • Science-based Targets (SBTi’s)
  • ISO 260000 standard on social responsibility
  • Other client requirements, specific to your sector, industry and country

Regulatory and Licensing Compliance

Our due diligence process covers, but is not limited to the following:

  • Non-financial Reporting Directive (NFRD) / Corporate Sustainability Reporting Directive (CSRD)
  • Regulation on Sustainability-related Disclosures in the Financial Services Sector (SFDR)
  • EU Taxonomy Regulation
  • Green Deal
  • Other client requirements, specific to your sector, industry and country

Training, Coaching and Project Management

“Sustainability is a journey. It starts with small steps in the right direction. Operating and growing sustainably can ensure your organization continues to create value for the long-term.”

Climate Change Advisory Services

Carbon Accounting, Reporting and Offsetting

Net Zero Strategy Development and Implementation

Waste and Energy Management

Standards and Assessments

Having Questions or Need Assistance?
Get in touch!

Who to Contact

Christina Tsiarta

Christina Tsiarta


Christina Tsiarta is leading the sustainability, ESG (Environmental, Social, Governance) and climate change advisory services at Kreston Ioannou & Theodolou Ltd.

Christina obtained her undergraduate degree in Environmental Policy & Economics at the London School of Economics and Political Science (LSE), and her post-graduate degree in Environmental Science and Management at the Bren School of Environmental Science and Management, at the University of California, Santa Barbara (UCSB), which she attended as a Fulbright Scholar and with the Dean Ernst Von Weizsäcker scholarship. Christina specialises in sustainability, ESG and climate change advisory services, and has over 13 years of professional experience. She started her professional career in London, where she was based for eight years, before relocating back to Cyprus in 2017.

Over the course of her career, Christina has worked with local municipalities, national government agencies and numerous of the Directorates-General of the European Commission, as well as the private sector across countries and across industries, to include HORECA, food production, energy, telecommunications, waste, financial services, transportation and construction.

The types of projects that Christina has managed and delivered have ranged from technical and operational support to policy reform, strategy development and implementation, due diligence and compliance audits, implementation of standards, stakeholder engagement, reporting, gap analysis, materiality assessments and more. Christina also writes articles and blogs on sustainability and ESG issues.

Christina holds a PRINCE2TM certification as a project manager and is a member of the Institute of Environmental Management and Assessment (IEMA). She has strong technical and analytical skills, in-depth knowledge of her subject matter and excellent organisational skills, to help your organization operate and grow sustainably and resource efficiently.

Outside of work, Christina enjoys spending time with her family, as well as travelling, and has a keen interest in the arts, whether that’s going to the ballet, the theatre or the opera, visiting museums and galleries or reading literature.



Telephone: +357 22050500