Meet some of the team


Michael O'Byrne, CEO

Developing a global footprint, whilst maintaining Greenstreets’ commitment to delivering high quality service to clients have been Michael’s twin goals since he came on board almost 10 years ago. His broad commercial experience, specifically in the areas of product development and strategic marketing have helped to drive the company’s growth in European and North American markets. Prior to Greenstreets, Michael held senior roles in the logistics and technology sectors, working with a number of international and publicly quoted firms including Computer Associates and AP Moller Group. Michael completed his MBA in 2001.

Keith Burton, Consulting Director and Program Manager

Keith joined Greenstreets in 2000 and during his tenure has fulfilled a number of specialist roles ranging from lead consultant to software developer. He has overseen the development of Greenstreets’ extensive range of business and software solutions for clients in the EU, Canada and Australia and has managed our GRIPS™ Statistical Application development program. His vast international EPR experience in Packaging, WEEE & Batteries, End-of-Life Vehicle and Waste Tyre compliance has been hugely instrumental in helping to develop methodologies and software that enable Greenstreets’ clients to meet compliance and sustainability reporting requirements for many product streams. Prior to joining Greenstreets, Keith worked as a Senior Analyst Programmer and Project Leader in the financial services industry and hold a BSc. in Computer Science from Trinity College Dublin.

Val Sheridan, Compliance & Sustainability Manager

Val is the Compliance & Sustainability Manager for Greenstreets and manages a range of national and international compliance projects across Europe and Canada. He has extensive experience managing projects in the areas of Extended Producer Responsibility, Waste Management, Energy Management and Sustainability reporting. He holds an MSc in Sustainable Development, an Advanced Diploma in Project Management and is a trained ISO auditor. Prior to joining Greenstreets in 2008, he worked with Cavan County Council's Waste Management and Planning departments.

Howard Mulligan, Commercial Manager

Howard works closely with our key national and international accounts, supporting them with their environmental compliance obligations and reporting and helping to develop turnkey solutions to meet their specific needs. He has also been actively involved in the growth and development of several of Greenstreets’ international markets where his qualifications and extensive experience in both business and environmental management have proved very useful. Howard holds a BA in Management Practice and a CM in Environmental Auditing.

Iga Sitna, Consultant

Iga works both as a consultant and data analyst, helping to manage the reporting requirements for Irish and international client organisations, across a range of different EPR waste streams. She has also fulfilled a number of other roles and most recently was directly involved in refining an industry-specific calculation tools that Greenstreets developed for a national compliance organisation. Prior to joining Greenstreets in 2011, Iga held a number of technical roles in the engineering and building component sector. Iga has a BSc in Environmental Engineering and is currently studying a CMI Diploma in Environmental Management.

Helen Little, UK Commercial Manager

Helen manages Greenstreets’ UK client portfolio and has been involved with the Packaging Waste Regulations since their inception, having managed one of the UK’s largest Packaging Compliance schemes earlier in her career. Helen has worked as a consultant for more than 11 years, advising clients on waste and recycling legislation and providing training and guidance to registered producers on how to report data accurately. Helen joined Greenstreets in 2015 and in conjunction with her 20 years’ industry experience, she has a BSc (Hons) in Environmental Management.

Klara Kovacic, Senior Consultant and Project Manager

Klara is lead consultant on a number of key environmental auditing and compliance projects. Prior to Greenstreets, Klara worked for a number of Fortune 100 companies including AECOM, Oracle and Microsoft in senior consulting and project management roles. She brings a wealth of experience in the areas of environmental management, compliance, auditing, sustainability and air quality. She is also an experienced data analyst, with deep industry knowledge of the technology, pharmaceuticals and building materials sectors. Klara holds an MSc in Environmental Science and BEng in Electrical Engineering; she is also a Certified Project Manager, Environmental Auditor and Chartered Environmentalist

Emmet Sandford, Consultant

Since joining Greenstreets in 2012, Emmet has worked primarily within our compliance division, helping Irish and International clients to manage their environmental obligations under a range of EU directives. He also has overall responsibility for the management of Greenstreets’ accreditation to the ISO9001:2015 standard. Emmet is a fully qualified electrician and has extensive experience in the area of electrical engineering and energy management, having attained a BSc and BEng Tech in both in 2011. Emmet also holds an MSc in Sustainable Development, completing this course in 2017.