September 17, 2021

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Geosyntec Announces Office Expansion in Dublin

Geosyntec Consultants is pleased to announce the expansion of our office in Dublin, Ireland.

The move to a larger office in Dublin will accommodate Geosyntec's growing services in soil and groundwater assessment and remediation, environmental due diligence and compliance auditing, and environmental regulatory support.

Led by Graham Webb, Geosyntec's Dublin staff members doing remarkable work, including enhanced in-situ bioremediation of trichloroethylene (TCE) in a fractured limestone aquifer, remediation through source removal, and multiphase extraction at a former pharmaceutical facility.

Supporting Staff

With nearly 30 years of experience in environmental consulting in Ireland and the UK, and a background in civil and geotechnical engineering in New Zealand, Graham specializes in the assessment and management of contaminated land and groundwater at industrial sites and landfills, as well as in the development and implementation of remediation action plans.

Thomas Vainio-Mattila, P.Geo., EurGeol, is a Principal Environmental Consultant based in Ireland with more than 25 years of experience focused on environmental consulting in Ireland, the United Kingdom, and Germany. Thomas has vast experience in the waste sector involving the design, engineering, and environmental compliance management of landfills and other licensed facilities.

Sonya O'Loughlin, MSc, is a Senior Staff Hydrogeologist based in Ireland who works on a variety of environmental site assessment and remediation projects on both closed and active industrial sites. Her projects involve geological, hydrogeological, and chemical data collection, as well as interpretation of data and preparation of technical reports. She has specialist software experience including ArcGIS, Microsoft Access, AQTESOLV, and EVS.

Stephen Coakley, (Mod Geo) LLB LLM PhD P.Geo. EurGeol, is a Project Scientist based in Ireland
with over thirteen years of professional experience, including four years as an environmental consultant and nine years as a lawyer. His work focuses on investigation, assessment, management, and remediation of contaminated land, including operational and legacy industrial sites (in the dairy, manufacturing, pharmaceutical, and oil industries), as well as unregulated landfills.

Keith Harlin, MSc, is a Staff Hydrogeologist based in Ireland who focuses on a variety of site investigations and groundwater monitoring projects throughout the UK and Ireland. Keith is currently involved in the implementation of a remedial action plan involving enhanced in-situ bioremediation to remedy groundwater contaminated by organic solvents within a fractured bedrock aquifer. He is also involved in designing a remedial strategy for THF contamination in a confined fractured bedrock aquifer.

David Holmes, PhD, MCIWEM C.WEM, CSci, is a Chartered Scientist based in Ireland who focuses on site investigation, conceptual site model development, remediation, and validation.  He has a particular interest in NAPL, and pioneered the use of LNAPL mobility as a metric in the United Kingdom, Ireland, and Europe. In 2017, he was awarded the Brownfield Briefing Award for Best Scientific Advance and in 2019 he won the UK Spill Innovation Award for his development of new LNAPL monitoring methods. David has spoken at several international conferences and he is currently Chair of the UK Society of Brownfield Risk Assessors (SoBRA) NAPL subgroup. He is a guest MSc lecturer at the University of Portsmouth and at the University of Greenwich.

More Information

Postal address: Unit 10, Northwood Court, Northwood Crescent, Santry, Dublin, D09 W8DT, Ireland
Learn more about Geosyntec's operations in Ireland at:
For consultation regarding contaminated land and groundwater assessment and management, contact Graham at This email address is being protected from spambots. You need JavaScript enabled to view it. or Thomas at This email address is being protected from spambots. You need JavaScript enabled to view it.