Clients of Sweeney Consultancy include:

EPA

NPWS

NIEA

IFI

Carlow Co. Co.

Cork Co. Co.

Kildare Co. Co.

Kilkenny Co. Co.

North Tipperary Co. Co.

Offaly Co. Co.

South Tipperary Co. Co.

Waterford City Council

Wexford Co. Co.

Glanbia plc

Dairygold Food Ingredients Ltd.

Irish Distillers Group

Lisheen Mines

ARUP

WYG Ireland

Treatment Systems Ltd.

Coillte Teoranta

Green Belt Ltd.

SWS Forestry Services

Mid-Western Forestry Services Ltd.

FDC Group