| 800 SUPER WASTE MANAGEMENT PTE LTD | 198601155H | Canberra | 38100 | 1986 |
| ABSOLUTE MAINTENANCE SERVICES PTE. LTD. | 200304458D | Eunos | 81211 | 2003 |
| ALBA W&H SMART CITY PTE. LTD. | 201938124E | Boon Lay | 38100 | 2019 |
| ASIA PACZ PTE. LTD. | 199103705M | Ang Mo Kio | 41001 | 1991 |
| ASK M&E PTE. LTD. | 200815981K | Boon Lay | 41001 | 2008 |
| BENG HENG ENGINEERING PTE LTD | 199601459C | Hougang | 41009 | 1996 |
| BH BUILDERS & ENGINEERING PTE. LTD. | 200723375R | Hougang | 41009 | 2007 |
| CHAN & CHAN ENGINEERING PTE. LTD. | 200407814Z | Admiralty | 42100 | 2004 |
| CHENG YAP CONSTRUCTION PTE LTD | 200108193N | Hougang | 42100 | 2001 |
| CLYDE - IFC (S) PTE LTD | 199605967K | Boon Lay | 28191 | 1996 |
| CORA ENVIRONMENT PTE. LTD. | 199507280G | Buona Vista | 38100 | 1995 |
| CORA ENVIRONMENT SERVICES PTE. LTD. | 199804675H | Buona Vista | 38100 | 1998 |
| CRIMSON (S) PTE. LTD. | 200515033G | Boon Lay | 38100 | 2005 |
| CSP MAINTENANCE PTE LTD | 199400236K | Boon Lay | 81211 | 1994 |
| DATA TERMINATOR PTE. LTD. | 200705336M | Dairy Farm | 62090 | 2007 |
| ECLAT SERVICES PTE. LTD. | 201117977R | Dairy Farm | 81211 | 2011 |
| ENG LENG CONTRACTORS PTE LTD | 199103080W | Mandai | 81211 | 1991 |
| ESUN INTERNATIONAL PTE. LTD. | 200721691H | Boon Lay | 46651 | 2007 |
| GAIA PROJECTS PTE. LTD. | 201116194R | Admiralty | 41009 | 2011 |
| GIM TIAN CIVIL ENGINEERING PTE LTD | 198800866E | Changi | 41009 | 1988 |
| GREEN ASIA HUB PTE. LTD. | 199608104N | Boon Lay | 38100 | 1996 |
| HAO WEI INTERNATIONAL PTE. LTD. | 200600726M | Boon Lay | 38100 | 2006 |
| HOCK CHUAN HONG WASTE MANAGEMENT PTE LTD | 199305775C | Pasir Ris | 38100 | 1993 |
| HONG HOCK GLOBAL PTE. LTD. | 201333837H | Canberra | 42301 | 2013 |
| HWA AIK ENGINEERING PTE. LTD. | 200209438R | Canberra | 43110 | 2002 |
| IGM SERVICES PTE LTD | 199100601E | Eunos | 81211 | 1991 |
| INFOCUS INTEGRATED ENGINEERING PTE. LTD. | 199609105C | Alexandra | 38100 | 1996 |
| JAMES CONTRACTOR PTE. LTD. | 198801856H | Canberra | 41009 | 1988 |
| JIN FU OFFSHORE & MARINE PTE. LTD. | 197800360C | Clementi Park | 30110 | 1978 |
| JOON THIAM INDUSTRIAL SERVICES PTE. LTD. | 201317586G | Admiralty | 38100 | 2013 |
| KLERRA PTE. LTD. | 201525197E | Boon Lay | 25120 | 2015 |
| LEADING BIO-ENERGY (S) PTE. LTD. | 200415886R | Admiralty | 38100 | 2004 |
| LOH BROTHERS PTE. LTD. | 197900837R | Dairy Farm | 43110 | 1979 |
| MAINT-KLEEN PTE. LTD. | 200210284W | MacPherson | 81211 | 2002 |
| MIRADOR BUILDING CONTRACTOR PTE LTD | 200006762R | Boon Lay | 41009 | 2000 |
| MODERN ASIA ENVIRONMENTAL HOLDINGS PTE. LTD. | 200415476E | Boon Lay | 38301 | 2004 |
| NAFA SYSTEM SERVICES PTE LTD | 198802713G | Eunos | 81211 | 1988 |
| NEO & GOH CONSTRUCTION PTE LTD | 199104895W | Eunos | 41009 | 1991 |
| P&B ENV PTE. LTD. | 201731370M | Canberra | 81211 | 2017 |
| PMPS LINER TECHNOLOGY (SINGAPORE) PTE. LTD. | 200711163C | Boon Lay | 42301 | 2007 |
| PNH RESOURCES PTE LTD | 200101754G | Canberra | 41009 | 2001 |
| POWER-VAC SERVICES (S) PTE. LTD. | 200405173K | Eunos | 38100 | 2004 |
| POWERMAN SERVICES PTE LTD | 198102353N | Canberra | 38100 | 1981 |
| POWERSTON SERVICES PTE. LTD. | 200405433D | Eunos | 38100 | 2004 |
| PRAISE TECHNOLOGIES PTE. LTD. | 202009610R | Boon Lay | 42100 | 2020 |
| PRECISE LEASING PTE. LTD. | 201715272H | Hougang | 49233 | 2017 |
| PRIDE-CHEM INDUSTRIES PTE LTD | 198703233M | Boon Lay | 20113 | 1987 |
| PRIMECH A & P PTE. LTD. | 198801704H | MacPherson | 81211 | 1988 |
| PRO-TEC GLOBAL PTE. LTD. | 200613637H | Ang Mo Kio | 43901 | 2006 |
| PV VACUUM ENGINEERING PTE LTD | 200002366R | Admiralty | 38100 | 2000 |
| QUEK & QUEK CIVIL ENGINEERING PTE LTD | 198800877H | Mandai | 41009 | 1988 |
| RE SUSTAINABILITY SOLUTIONS PTE. LTD. | 201725623M | Alexandra | 68203 | 2017 |
| RECLAIMS ENTERPRISE PTE. LTD. | 200903101E | Boon Lay | 41009 | 2009 |
| RS FACILITIES SERVICES PRIVATE LIMITED | 201310593M | Balestier | 81211 | 2013 |
| SCAT TECHNOLOGIES PTE LTD | 199003842C | Boon Lay | 38100 | 1990 |
| SEAVIEW TRANSPORT MANAGEMENT PTE LTD | 199701190N | Chinatown | 38100 | 1997 |
| SHANAYA ENVIRONMENTAL SERVICES PTE. LTD. | 200208018R | Boon Lay | 38100 | 2002 |
| SKV CONSTRUCTION & TRANSPORT PTE. LTD. | 200501038W | Boon Lay | 41001 | 2005 |
| SL GREASE CONTROL PTE. LTD. | 200201360C | Eunos | 38100 | 2002 |
| SOON KIM RECYCLING PTE. LTD. | 199804879C | Boon Lay | 38301 | 1998 |
| STARGROUP EST. PTE. LTD. | 200203041R | Dairy Farm | 81211 | 2002 |
| SUN CITY MAINTENANCE PTE. LTD. | 199504133M | Alexandra | 81211 | 1995 |
| SUNPAN RECYCLE PTE. LTD. | 199404090W | Eunos | 38301 | 1994 |
| THENG LIANG LEE SERVICES PTE LTD | 199500685E | Boon Lay | 81211 | 1995 |
| TITAN FACILITIES MANAGEMENT PTE. LTD. | 200601076K | Mandai | 81211 | 2006 |
| TOH BAN SENG CONTRACTOR PTE LTD | 198402463M | Eunos | 42301 | 1984 |
| TRANSCO-PAC TRANSPORT & ENVIRONMENTAL PTE. LTD. | 200300156M | Boon Lay | 38100 | 2003 |
| TRANSQUEST SUPPLIES & CO PTE LTD | 198901632N | Dairy Farm | 81211 | 1989 |
| TUAS RECYCLING PLANT (S) PTE LTD | 199504839Z | Dairy Farm | 38100 | 1995 |
| V8 ENVIRONMENTAL PTE LTD | 199900681R | Beach Road | 38100 | 1999 |
| WAH & HUA PTE LTD | 200000076M | Admiralty | 38100 | 2000 |
| YONG AIK CONSTRUCTION PTE LTD | 199903196Z | Canberra | 81300 | 1999 |
| YS YONG SERVICES PTE LTD | 199405268M | Canberra | 82999 | 1994 |
| ZIRCODATA SG HOLDINGS PTE. LTD. | 199402496H | Eunos | 96099 | 1994 |
| AMAZANA GRATIA PTE. LTD. Not yet published | 200415868M | MacPherson | 38100 | 2004 |
| ARAS DEVELOPMENT PTE. LTD. Not yet published | 200904375D | Eunos | 81211 | 2009 |
| BOON WEE CONST (S) PTE. LTD. Not yet published | 201107190K | Bedok | 38100 | 2011 |
| ELEMENTS INDUSTRIES PTE. LTD. Not yet published | 200812054E | Boon Lay | 41001 | 2008 |
| FUSHENG ENGINEERING CONSTRUCTION PTE. LTD. Not yet published | 200906515H | Eunos | 41001 | 2009 |
| GPM BUILDERS PTE. LTD. Not yet published | 200618619G | Hougang | 41001 | 2006 |
| GREENWAY ENVIRONMENTAL WASTE MANAGEMENT PTE. LTD. Not yet published | 200412740R | Boon Lay | 38100 | 2004 |
| HAV CONSTRUCTION PTE. LTD. Not yet published | 201111098D | Eunos | 41001 | 2011 |
| J.O.L ENVIRONMENTAL PTE. LTD. Not yet published | 200808235Z | Eunos | 38100 | 2008 |
| NEWSPAPER SENG TRADING PTE. LTD. Not yet published | 200308927M | Buona Vista | 18121 | 2003 |
| PERFECTION GENERAL SERVICES PTE. LTD. Not yet published | 200917507M | MacPherson | 81211 | 2009 |
| PRIMETOP ENGINEERING PTE. LTD. Not yet published | 201015822G | Changi | 41009 | 2010 |
| RVAC PRIVATE LIMITED Not yet published | 200702747E | Alexandra | 43299 | 2007 |
| VAC-JET SERVICES PTE. LTD. Not yet published | 200706490N | East Coast | 38100 | 2007 |