- Follow-on contracts for Kwun Tong District Community Green Station and Yuen Long District Community Green Station - (Awarded in November 2019)
- Pilot Scheme on Collection and Recycling Services of Plastic Recyclable Materials – Eastern District - (Awarded in October 2019)
- Treatment and Recycling of Waste Electrical and Electronic Equipment (WEEE) (Washing Machines) - (Awarded in September 2019)
- O▪PARK2 - (Awarded in August 2019)
- Islands District Community Green Station - (Awarded in August 2019)
- Installation and Testing Works at North District and Southern District Air Quality Monitoring Stations and Operation of Tseung Kwan O, North District and Southern District Air Quality Monitoring Stations - (Awarded in August 2019)
- Tai Po District Community Green Station - (Awarded in May 2019)
- Supply of Mock Designated Garbage Bags to the Environmental Protection Department (Awarded in April 2019)
- Lease of Lot T3 in EcoPark for Waste Recycling Business - (Awarded in March 2019)
- Lease of Lot T2 in EcoPark for Waste Recycling Business - (Awarded in March 2019)
- Real-time Monitoring of Volatile Organic Compounds in Hong Kong - (Awarded in November 2018)
- Lease of Lots P1, P5, P6 and P7 in EcoPark for Waste Paper Recycling and Manufacturing Plant - (Awarded in September 2018)
- Provision of Management Services for EcoPark - (Awarded in September 2018)
- Air Quality Monitoring Stations Contract - (Awarded in September 2018)
- Tuen Mun District Community Green Station - (Awarded in May 2018)
- Kwai Tsing District Community Green Station - (Awarded in May 2018)
- Glass Management Contract - Kowloon (Awarded in April 2018)
- Provision of Management and Operation Services for Fanling Environmental Resource Centre - (Awarded in March 2018)
- Lease of Lot T1 in EcoPark for Waste Recycling Business - (Awarded in March 2018)
- Integrated Waste Management Facilities Phase 1 - (Awarded in November 2017)
- Food Waste Pre-treatment Facilities for Food Waste / Sewage Sludge Anaerobic Co-digestion Trial Scheme - (Awarded in November 2017)
- Follow-on contracts for Sha Tin District Community Green Station and Eastern District Community Green Station - (Awarded in November 2017)
- Glass Management Contract – Hong Kong Island and Islands District - (Awarded in November 2017)
- Glass Management Contract – the New Territories - (Awarded in November 2017)
- Lease of Lot T6 in EcoPark for Waste Recycling Business - (Awarded in August 2017)
- Lease of Lot T5 in EcoPark for Waste Recycling Business - (Awarded in May 2017)
- Provision of Service for Operation and Maintenance of the Indoor Air Quality (IAQ) Information Centre and Administering IAQ Certification Scheme - (Awarded in March 2017)
- Provision of Services for Measurement of Vehicular Exhaust At Roadside by Using Remote Sensing Devices - (Awarded in February 2017)
- Provision of Management and Operation Services for Wan Chai Environmental Resource Centre - (Awarded in January 2017)
- Provision of Services for Sham Shui Po District Community Green Station - (Awarded in December 2016)
- Lease of Lot T4 in EcoPark for Waste Recycling Business - (Awarded in December 2016)
- Air Quality Monitoring Stations Contract No. 15 – Operation of Tap Mun, Tsuen Wan, Tung Chung and Yuen Long Air Quality Monitoring Stations - (Awarded in November 2016)
- Provision of Support Services for Monitoring the Implementation of Plastic Shopping Bag Charging - (Awarded in November 2016)
- Real-time Monitoring of Volatile Organic Compounds in Hong Kong - (Awarded in October 2016)
- Provision of Services for Replacing Electric Vehicle Standard Chargers with Medium Chargers at Government Car Parks under Transport Department and Government Property Agency - (Awarded in October 2016)
- Provision of Services for Yuen Long District Community Green Station - (Awarded in October 2016)
- Lease of EcoPark Lot P1 for Waste Recycling Business - (Awarded in September 2016)
- Provision of Services for Kwun Tong District Community Green Station - (Awarded in September 2016)
- North West New Territories Refuse Transfer Station Follow-on Contract - (Awarded in July 2016)
- Provision of Management and Operation Services for Fanling Environmental Resource Centre - (Awarded in January 2016)
- Low-Level Radioactive Waste Storage Facility Follow-On Contract - (Awarded in October 2015)
- Sha Tin Transfer Station Second Follow-On Contract - (Awarded in September 2015)
- Provision of Services for Eastern District Community Green Station - (Awarded in April 2015)
- Waste Electrical and Electronic Equipment Treatment Facility - (Awarded on 31 March 2015)
- Provision of Management and Operation Services for Wan Chai Environmental Resource Centre - (Awarded in January 2015)
- Supply of Automatic Filter Weighing System - (Awarded in January 2015)
- Organic Waste Treatment Facilities Phase 1 - (Awarded in December 2014)
- Air Quality Monitoring Stations Contract No. 14 – Operation of Kwai Chung, Kwun Tong, Sham Shui Po and Sha Tin Air Quality Monitoring Stations, and Provision of Data Centre Attendants - (Awarded in December 2014)
- Provision of Customer Services Officers for the Customer Services Centre of the Environmental Protection Department - (Awarded in December 2014)
- Provision of Services for Shatin District Community Green Station - (Awarded in November 2014)
- Provision of Support Services for Monitoring the Implementation of Plastic Shopping Bag Charging - (Awarded on 16 July 2015)
- Real-time Monitoring of Volatile Organic Compounds in Hong Kong - (Awarded in February 2015)
- Provision of Management and Operation Services for Tsuen Wan Environmental Resource Centre - (Awarded in January 2015)
- Provision of Management Services for EcoPark 2014 - (Awarded in October 2014)
- Outlying Islands Transfer Facilities Follow-On Contract - (Awarded in January 2013)
- Island West and Island East Transfer Stations Follow-On Contract - (Awarded in November 2012)
- West Kowloon Transfer Station Follow-On Contract - (Awarded in October 2012)
- Tender for Lease of a EcoPark Phase 2 lot for Waste Recycling Business (Awarded in August 2012)
- Operation of Kwai Chung, Shatin, Sham Shui Po and Kwun Tong Air Quality Monitoring Stations - (Awarded in October 2011)
- Provision of services for field survey of the Pearl River Estuary and Coastal Water Environment (Dry Season) - (Awarded in January 2011)
- Development of EcoPark in Tuen Mun Area 38 - Remaining Works (Tender Ref.: EP/SP/65/11)
- Tender for Lease of Six EcoPark Phase 2 lots for Waste Recycling Business (Tender Ref.: EP11-01)
- Operation of Tap Mun, Tsuen Wan, Tung Chung and Yuen Long Air Quality Monitoring Stations - (Awarded in November 2010)
- Sludge Treatment Facilities - (Awarded in September 2010)
- Sha Tin Transfer Station Follow-On Contract (Awarded in September 2009)
- Island East Transfer Station Follow-On Contract (Awarded in January 2009)
- Engineering Investigation and Environmental Studies for Integrated Waste Management Facilities Phase 1 – Feasibility Study (Awarded in November 2008)
- Tenancy for the Phase I lot at EcoPark in Tuen Mun Area 38 ;(Awarded in August 2008)
- Refurbishment and Modification of Sha Tin Transfer Station - Feasibility Study (Awarded in January 2008)
- Tenancies for the second batch of Phase I lots at EcoPark in Tuen Mun Area 38 (Awarded in Dec 2007)
- Study of Major Industrial Air Pollution Sources in the Pearl River Delta Region - Feasibility Study (Awarded in October 2007)
- Study of VOC and Photochemcial Ozone Pollution in the Pearl River Delta Region - Feasibility Study (Awarded in September 2007)
- Review of the Air Quality Objectives and Development of a Long Term Air Quality Strategy for Hong Kong - Feasibility Study (Awarded in June 2007)
- Tenancy for the first batch of Phase I lots at EcoPark in Tuen Mun Area 38 (Awarded in April 2007)
- Review of West Kowloon and Tsuen Wan Sewerage Master Plans - Feasibility Study (Awarded in Janurary 2007)
- Provision of Management Services for EcoPark in Tuen Mun Area 38 (Awarded in November 2006)
- Development of EcoPark in Tuen Mun Area 38 (Awarded in June 2006)
- Demonstration Scheme on Reclaimed Water Uses in the North District - Reclaimed Water Treatment Plant and Distribution System (Awarded in May 2006)
- Services for the Supply and Installation of Particulate Removal Devices to Reduce Particulates from the Exhaust of Pre-Euro Emission Standard Diesel Vehicles each of Permitted Gross Vehicle Weight over Four Tonnes that needs to undertake Long Idling Duties and using Diesel of Sulphur Content not more than 0.005% (by Weight) (Awarded in April 2005)
- Services for the Supply and Installation of Particulate Removal Devices to Reduce Particulates from the Exhaust of Cross Border Pre-Euro Emission Standard Diesel Vehicles each of Permitted Gross Vehicle Weight over Four Tonnes and using Diesel of Sulphur Content up to 0.2% (by Weight) (Awarded in May 2003)
- Services for the Supply and Installation of Particulate Removal Devices to Reduce Particulates from the Exhaust of Pre-Euro Emission Standard Diesel Vehicles each of Permitted Gross Vehicle Weight over Four Tonnes and using Diesel of Sulphur Content not more than 0.005% (by Weight) (Awarded in Nov 2002)