Our Members
Member Addresses and Places of Business
Links to Member Company Web Sites
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Local natural gas distribution companies and their corporate parents.
- Algonquin Power & Utilities Corp.
- ALLETE, Inc.
- AltaGas Ltd.
- AltaGas Utilities Inc.
- Ameren Corporation
- Ameren Illinois
- Ameren Missouri
- Appalachian Natural Gas Distribution
- Arkansas Oklahoma Gas Corporation
- Aspire Energy
- Atlanta Gas Light
- Atmos Energy Corporation
- AVANGRID Inc.
- AVANGRID Networks
- Avista
- Bangor Gas Company
- Berkshire Gas Company
- Berkshire Hathaway Energy
- BGE, An Exelon Company
- Black Hills Corporation
- Black Hills Energy
- Black Hills Power, Inc.
- Bluefield Gas Company
- Brainard Gas
- Cascade Natural Gas Corporation
- CenterPoint Energy
- Central Florida Gas Co., Div. Chesapeake Utilities
- Central Hudson Gas & Electric Corporation
- Chattanooga Gas
- Chesapeake Utilities Corp., Delaware & Maryland Divisions
- Chesapeake Utilities Corporation
- Citizens Energy Group
- Citizens Gas Fuel Company
- City Gas Company
- City of Charlottesville, Public Utilities Division
- City of Corpus Christi
- City of Richmond, Department of Public Utilities
- Clarke-Mobile Counties Gas District
- Clearwater Gas System
- CMS Energy Corporation
- Colorado Natural Gas, Inc.
- Colorado Springs Utilities
- Columbia Gas of Kentucky
- Columbia Gas of Maryland
- Columbia Gas of Massachusetts
- Columbia Gas of Ohio
- Columbia Gas of Pennsylvania
- Columbia Gas of Virginia
- Connecticut Natural Gas Corporation
- Consolidated Edison Company of New York, Inc.
- Consolidated Edison, Inc.
- Constellation, An Exelon Company
- Consumers Energy Company
- Corning Natural Gas Corporation
- CoServ Gas
- CPS Energy
- Delmarva Power, An Exelon Company
- Delta Natural Gas Company, Inc.
- Dominion Energy
- Dominion Energy - Southeast Energy Group
- Dominion Energy Ohio
- Dominion Energy Utah
- Dominion Energy West Virginia
- DTE Energy
- DTE Gas Company
- Duke Energy Corporation
- Elizabethtown Gas
- Elkton Gas
- Emera Inc.
- Energy West Montana
- Energy West, Inc.
- ENSTAR Natural Gas Company
- Entergy Louisiana, LLC
- Entergy New Orleans, Inc.
- Entergy Services, Inc.
- Eversource Energy
- Exelon Corporation
- Fairbanks Natural Gas
- Fitchburg Gas and Electric Light Company
- Florida City Gas
- Florida Public Utilities Company
- Fort Pierce Utilities Authority
- Fortis Inc.
- FortisBC Energy Inc.
- Frontier Natural Gas
- Gainesville Regional Utilities
- Great Plains Natural Gas Co.
- Greater Minnesota Gas, Inc.
- Greenville Utilities
- Greenwood Commissioners of Public Works
- HAWAI'I GAS
- Hearthstone Utilities Inc.
- Henderson Municipal Gas
- Holyoke Gas & Electric
- Illinois Gas Company
- Intermountain Gas Company
- Kansas Gas Service
- KNG Energy
- Knoxville Utilities Board
- Las Cruces Utilities
- Leatherstocking Gas Company LLC
- LG&E-KU, PPL Companies
- Liberty Utilities Company
- Lumberport-Shinnston Gas Company, Inc.
- Madison Gas and Electric Company
- Maine Natural Gas
- MDU Resources Group, Inc.
- Memphis Light, Gas & Water Division
- Metropolitan Utilities District
- MGE Energy, Inc.
- Michigan Gas Utilities
- MidAmerican Energy Company
- Middle Tennessee Natural Gas Utility District
- Minnesota Energy Resources
- Montana-Dakota Utilities Co.
- Mountaineer Gas Company
- Mt. Carmel Public Utility Co.
- Nashville Gas, Div. of Piedmont Natural Gas Co.
- National Fuel Gas Company
- National Fuel Gas Distribution Corporation
- National Grid
- Natural Gas Processing Co.
- New Jersey Natural Gas Company
- New Jersey Resources
- New Mexico Gas Company
- New York State Electric & Gas Corporation
- Nicor Gas
- NIPSCO
- NiSource Inc.
- Norgasco Inc.
- North Shore Gas
- Northeast Ohio Natural Gas
- Northern Utilities, Inc.
- NorthWestern Energy
- Norwich Public Utilities
- NV Energy
- NW Natural
- Oak Ridge Utility District
- Ohio Valley Gas Corporation
- Okaloosa Gas District
- Oklahoma Natural Gas
- ONE Gas, Inc.
- Orange & Rockland Utilities, Inc.
- Orwell Natural Gas Company
- Pacific Gas and Electric Company
- PECO, An Exelon Company
- Peoples Gas
- Peoples Natural Gas
- Pepco, An Exelon Company
- Philadelphia Gas Works
- Piedmont Natural Gas Company, Inc.
- Pike County Light and Power
- Pike Natural Gas Company
- PPL Corporation
- PSNC Energy, A SCANA Company
- Public Service Electric and Gas Company
- Puget Sound Energy
- RGC Resources, Inc.
- Richmond Utilities Board
- Roanoke Gas Company
- Rochester Gas & Electric Corporation
- Rocky Mount Public Utilities
- San Diego Gas & Electric Company
- Sandpiper Energy
- SCANA Corporation
- SEMCO Energy Gas Company
- SiEnergy
- South Carolina Electric & Gas Company
- South Jersey Gas Company
- South Jersey Industries, Inc.
- Southern California Gas Company
- Southern Company
- Southern Company Gas
- Southern Connecticut Gas Company
- Southwest Gas Corporation
- Southwest Gas Holdings, Inc.
- Southwestern Virginia Gas Company
- Spire Inc.
- Summit Natural Gas of Maine, Inc.
- Summit Natural Gas of Missouri, Inc.
- Summit Utilities, Inc.
- Superior Water, Light and Power Company
- TECO Energy, Inc.
- TECO Peoples Gas
- Terrebonne Parish Consolidated Government
- Texas Gas Service
- The Energy Cooperative
- UGI Corporation
- UGI Utilities, Inc.
- Union Oil & Gas Inc.
- UniSource Energy Services
- Unitil Corp.
- UNS Energy Corp., a Fortis Co
- UNS Gas, Inc.
- Utility Pipeline Ltd.
- Valley Energy, Inc.
- Vectren Corporation
- Vermont Gas Systems, Inc.
- Washington Gas Light Company
- We Energies
- WEC Energy Group
- Westfield Gas & Electric Department
- WGL Holdings, Inc.
- Wisconsin Public Service
- Wyoming Gas Company
- Xcel Energy Inc.
- Zia Natural Gas Company
U.S. natural gas pipelines; Canadian and Mexican natural gas utilities and pipelines; U.S., Canadian and Mexican natural gas marketers, brokers and gatherers.
- ANR Pipeline Company
- ATCO Gas
- ATCO Group
- Centra Gas Manitoba Inc.
- Cheniere Energy, Inc.
- Distrigas LNG
- Dominion Energy Carolina Gas Transmission, LLC
- Dominion Energy Transmission, Inc.
- Dow Pipeline Company
- Eastern Shore Natural Gas Company
- Enbridge Gas Distribution Inc.
- Enbridge Inc.
- Enbridge St. Lawrence Gas
- Énergir
- Equitrans Midstream Corp.
- Intragaz
- Kern River Gas Transmission Co.
- Kinder Morgan Inc.
- Manitoba Hydro
- National Fuel Gas Supply Corporation
- Northern Natural Gas Company
- NW Natural Gas Storage
- PAA Natural Gas Storage, L.P.
- Plains All American Pipeline
- Rockpoint Gas Storage
- Sacramento Municipal Utility District
- Southern Natural Gas Company
- Southern Star Central Gas Pipeline, Inc.
- Sprague Operating Resources, LLC
- Tellurian, Inc.
- Tenaska Marketing Ventures
- Tennessee Gas Pipeline
- TransCanada Corporation
- TranCanada CGT
- WBI Energy, Inc.
Organizations outside of North America eligible to participate in Operations Best Practices/Benchmarking Program and Selected Operating Section Committees.
- COMGAS
- Naturgy Energy Group S.A.
- Osaka Gas Company, Ltd.
- PROMIGAS S.A., ESP
- Sociedad Partuaria El Cayao
- Tokyo Gas America, Ltd.
Organizations outside of North America.
Suppliers, consultants, members of the operating, financial, marketing and legal communities, and others providing services to the industry.
- 3M Electrical Markets Division
- 3P Utility Services
- A.O. Smith Water Products Company
- A.Y. McDonald Manufacturing Company
- Aaron's Fabrication of Steel, Tube & Welding Inc.
- Abriox Inc.
- Accenture
- Accurate Corrosion Control, Inc.
- Aclara
- Advanced Control Panels, Inc.
- AEGIS Insurance Services, Inc.
- Aether DBS
- Agave Wire LTD
- AGI Construction, Inc.
- Agile Sourcing Partners
- AGRU America, Inc.
- Aim Energy Group Inc.
- Aldridge Electric, Inc.
- Algas-SDI
- Aliaxis Utilities France
- Alliance Consulting Group
- Altec Industries
- American Innotek, Inc.
- American Polywater Corporation
- Aptus Group USA, LLC
- ARB, Inc. - a subsidiary of Primoris Services Corporation
- ARC-TWO Consulting Inc. (no website)
- Ariel Corporation
- Arkema Inc.
- Armstrong Teasdale, LLP
- AVEVA Inc
- B. Frank Joy, LLC
- Babst Calland
- Baker Hughes, a GE Company
- Balon Corporation
- Barr Engineering Co.
- Bascom-Turner Instruments
- Bay Utility Associates, LLC (no website)
- BelGAS
- Benton-Georgia, LLC
- Bevolo Gas & Electric Lights
- Bingham & Taylor
- Bingham Greenebaum Doll LLP
- Bison Engineering, Inc.
- Black & Veatch Corporation
- Black & Veatch Corporation
- Black & Veatch Corporation
- Black & Veatch Corporation
- Blackeagle Energy Services
- Blue Engineering and Consulting Company
- Boehmer GmbH
- Bond Brothers, Inc.
- Border States
- Bowman Consulting Group
- Bradley B Bean PE
- BRAEMAR ENGINEERING
- BROEN, Inc.
- Brownfield Science & Technology, Inc.
- Burns & McDonnell
- Calpine
- Cameron, A Schlumberger Company
- Campos EPC LLC
- Canada Pipeline Accessories Company Ltd.
- Carlin/Hydrolevel
- CartoPac International, Inc.
- CB&I Storage Systems, Division of McDermott International
- Celerity Consulting Group
- Cenozon Inc.
- Centuri Construction Group
- CGI Utilities
- CH-IV International
- CHA Consulting, Inc.
- Charter Plastics, Inc.
- Chevron Phillips Chemical Co.
- CHI Engineering Services, Inc.
- Chicago Fittings Corporation
- CIRCOR Energy
- Clevest
- ClickSoftware, Inc.
- Colorado Engineering Experiment Station, Inc
- Concentric Energy Advisors Inc.
- Consolidated Analytical Systems, Inc.
- Consolidated Pipe & Supply Co.
- Continuum Advisory Group
- Continuum Capital
- ControlPoint Limited
- Coorstek Igniter Products
- Copperhead Industries, LLC
- Copperleaf Technologies
- Corpac Steel Products
- Cosmodyne, LLC
- Cozen O'Connor
- CR Wall
- Critigen
- CS Week
- Cullen and Dykman LLP
- d'Escoto, Inc.
- David Mason + Associates, Inc
- Daymark Energy Advisors, Inc.
- Deloitte
- Deloitte
- Deloitte
- Deloitte
- Deloitte Tax LLP
- Delta Instrument LLC
- Digital Control Incorporated
- Ditch Witch
- DNV GL
- Dow
- Doyle Hartman, Oil Operator
- Dresser Becker Precision Equipment
- Dresser Natural Gas Solutions
- Dresser Pressure Regulation Group
- DRS Enterprises Inc.
- DuPont Company
- Duraline/PolyPipe
- Dynamic Risk
- E2 Consulting Engineers, Inc.
- Eagle Research Corporation
- Earthres Group, Inc.
- Ecotec Solutions, Inc.
- Edgen Murray
- EF Technologies, Inc.
- EigenPatterns
- Elecnor Hawkeye LLC
- Elecsys Corporation
- Electro Scan Inc.
- ELM Companies
- Elsyca, Inc.
- Emerson
- Emerson Automation Solutions (Micro Motion)
- Emerson Automation Solutions - Daniel Measurement & Control
- Emerson Automation Solutions - Remote Automation Solutions
- EN Engineering
- Endress+Hauser Flowtec AG Division USA
- Enerdy, Inc (no website)
- Energy Control Systems, Inc.
- Energy Economics Inc.
- Energy Efficiency Design & Development, Inc.
- Energy Experts International, Inc.
- Energy Land & Infrastructure, LLC
- ENERGY worldnet, Inc.
- EnerSys Corporation
- Enetics, Inc.
- Enterprise Products Partners, L.P.
- EnviroCal, Inc.
- Epcon Partners, Inc.
- Equipment Controls Company
- Ernst & Young LLP
- Esri, Inc.
- EtaGen, Inc.
- Evercore Partners
- Evonik Corporation
- exp Energy Services Inc.
- EXP Inc
- Exponent, Inc.
- Exponent, Inc.
- Farnsworth Group, Inc.
- Farwest Corrosion Control Company
- Feeney Brothers Utility Services
- Ferreira Construction Co., Inc.
- Fitch Ratings
- Flagger Force Traffic Control Services
- Flow-Cal, Inc.
- Footage Tools
- Foster Associates Consultants, LLC
- FTH, LLC
- G2 Integrated Solutions
- Gannett Fleming Valuation and Rate Consultants, LLC
- Gas Measurement Instruments Ltd.
- Gas Operations Innovation Alliance, LLC
- Gas Transmission Systems, Inc.
- GDS Associates, Inc.
- GE / Dresser
- GE Oil & Gas - Dresser Meters and Instruments
- GEI Consultants, Inc.
- Genetec
- GeoEngineers, Inc.
- Georg Fischer Central Plastics, LLC
- Geostock Sandia, LLC
- Gleeds
- Global Information Systems, LLC
- Goodman Main Stopper Mfg. Co., Inc.
- GP Strategies
- Grace Industries LLC
- Grid One Solutions Inc.
- GROEBNER
- GTI - Gas Technology Institute
- Hallen Construction Company
- HammerHead Trenchless
- Hanging H
- HBK Engineering, LLC
- The HDD Company
- HDR
- Heath Consultants Incorporated
- Heidrick & Struggles
- Henkels & McCoy, Inc.
- Hermann Sewerin GmbH
- Hexagon
- Holland Engineering, Inc.
- HomeServe USA
- Honeywell Process Solutions
- Honeywell Smart Energy Gas Americas
- Hubbell Gas Connectors & Accessories
- Hydromax USA
- ICF
- IMAGING ATOMS INC
- Industrial Fabrics, Inc.
- Industrial Training Services, Inc.
- INEOS Olefins & Polymers USA
- INFICON
- InfraSource
- Inner-Tite Corp.
- Innovative Compliance Inc. (no website)
- Integrity Solutions Field Services
- InterCon Construction, Inc.
- International/Interprovincial Corrosion Control
- IPEX USA LLC
- Irby Company
- iRestore
- ISCO
- Itron, Inc.
- Itron, Inc.
- IQGeo
- Jameson LLC
- JANA Corporation
- JL Allen Services, Inc.
- JM Eagle
- JMS Natural Gas Consulting LLC
- Joe Knows Energy LLC
- John P. Woodyard, PE
- Jomar Valve
- JRGO, LLC
- Kaiser Premier LLC
- Kelley Instrument Machine, Inc.
- Kentucky Laborers's District Council (no website)
- Kerotest Manufacturing Corp.
- Kiely Family of Companies
- Kiewit Energy
- Kleinfelder, Inc.
- KPMG LLP
- KROHNE Oil & Gas LLC
- KS Energy Services
- Landis + Gyr
- LASEN Inc.
- Law Offices of James D Albright
- Lazard
- Liberty Coating Company LLC
- Liberty Sales & Distribution, LLC
- Linc Energy Systems
- Linde Engineering North America Inc.
- LineVision, Inc.
- Lucasys
- Luvian Partners, Inc.
- Luxfer-GTM Technologies, LLC
- Lyall
- M. T. Deason Company, Inc.
- Magnolia River
- Mainline Control Systems
- Massachusetts Materials Tech LLC
- MasTec North America, Inc.
- MATCOR, Inc.
- Maxitrol Company
- MBW Incorporated
- McCarter & English, LLP
- McCoy Leavitt Laskey LLC
- McDonald Hopkins
- McElroy Manufacturing, Inc.
- McKinsey & Company, Inc.
- Meade
- Mears Group, Inc.
- MESA
- Meter Valve & Control Inc
- Michael Baker International
- Michels Corporation
- Milhouse Engineering and Construction, Inc.
- Miller Consulting Services
- Miller Environmental Group, Inc.
- Miller Pipeline
- Milliken Infrastructure
- Milwaukee Tool
- Minnesota Limited, LLC
- Minnesota Power
- Minova USA Inc.
- MISTRAS Group, Inc.
- Morgan Stanley
- Morgan, Lewis & Bockius LLP
- Mosaic
- Mott MacDonald
- Mountaineer Odorant And Pickling Specialist
- MRC Global
- MTS
- Mueller Company - Gas Products Division
- Munters Corporation
- Mustang Sampling
- NatGas Consulting
- National Compliance Management Service, Inc. (NCMS)
- National Plant Services
- Natural Gas Technology Center
- Navigant Consulting
- Neptune Research Inc.
- Network Infrastructure, Inc.
- Nicopress Products
- Nightstick
- Nixon Energy Solutions
- Northstar Industries, LLC
- Norton Corrosion Limited
- Norton McMurray Manufacturing Company
- NOVARA GeoSolutions, A CHA Company
- NPL Construction Co.
- Oberon Company
- Olameter
- Oliver Wyman
- OMark Inc.
- Omega Flex
- Omni Flow Computers, Inc.
- Open Systems International
- Opvantek Inc.
- Oracle Corporation
- Oracle Corporation
- Oracle Corporation
- Oracle Corporation
- Oracle Corporation
- Outrider Gas Transports
- Oxford Plastics USA
- Palmetto Integrity Services, LLC
- Paradigm
- Patrick Engineering
- Paxon Energy & Infrastructure Services
- Performance Pipe, Div. of Chevron Phillips Chemical Company LP
- Pergam Technical Services
- Phillips Lytle LLP
- PI Confluence, Inc.
- Picarro Inc.
- Pietro Fiorentini USA
- Pipeline Equipment Resource Company
- Pipeline Plastics, LLC
- Pipeline Testing Consortium, Inc.
- Pivotal Home Solutions
- Pivvot
- Plasson
- Plastic Pipeline Integrity LLC
- Plauche' Maselli Parkerson
- PLCS LLC
- Pond and Company
- Post & Schell, P.C.
- PowerPlan, Inc.
- Precision Pipeline Solutions, LLC
- Prime NDT Services, Inc.
- Primera Engineers, Ltd.
- Primoris Distribution Services
- Pro-Line Safety Products Co.
- Progressive Pipeline Management
- Project Outsource Connects
- Prometric
- PRO-PIPE
- PS&S LLC
- Quantum Fuel Systems LLC
- Quarles and Brady LLP
- Ranger Environmental, Inc.
- RBC Resources LLC
- RCP Inc.
- Red Clay Consulting
- Regions Securities, LLC
- RegSafe (no website)
- Regulated Capital Consultants, LLC
- Renaissance Global Services LLC
- RMG
- RMG Americas, Inc.
- RoadSafe Traffic Systems
- Robert H. Peterson Company
- Robert J. Devereaux Corporation, Inc.
- Rod Walker & Associates Consultancy
- Roman E&G Corp (no website)
- Romet Limited
- ROSEN Group
- Rummel, Klepper & Kahl, LLP
- S.I.T. Controls U.S.A., Inc.
- SAE, Inc.
- Safety Scan USA, Inc.
- Sanborn, Head & Associates, Inc.
- Sasol Chemicals North America LLC
- Schneider Electric
- Schneider Electric
- ScottMadden, Inc.
- Seal for Life
- Seiler Instrument
- Sensit Technologies
- Sensus, a xylem brand
- SGS
- Shell Polymers
- Shelter Harbor Advisors
- Shelter Works
- SICK, Inc.
- Sidock Group, Inc.
- Silver Needle, Inc.
- SiteWise LLC
- SLR International
- Smith-Blair, Inc.
- Snelson Companies, Inc.
- Southeast Connections, LLC
- Southern Cross
- Southwest Research Institute
- SpectraSensors, Inc.
- Stabilis LNG
- Standby Systems, Inc.
- Stantec
- STATS Groups
- Steptoe & Johnson PLLC
- Stevens & Lee
- Storti Quality
- STRATOCOM Solutions
- Stream-Flo Industries
- Structural Integrity Associates, Inc.
- Subsite Electronics
- Suburban Consulting Engineers, Inc.
- Surveying And Mapping, LLC
- Sunbelt Marketing
- T.D. Williamson, Inc.
- Tansley Associates Environmental Sciences
- Technico
- Tecvalco Ltd.
- Teco Americas
- Teel Plastics Inc.
- Teledyne GMI
- Terra Tape, Div. of Reef Industries
- The Lisbon Group, LLC
- Thermo Fisher Scientific
- Thigpen Solutions
- Timberline Tool
- TMCo, Inc.
- TMCO Operating, LLC
- TPE Midstream, LLC
- TRC
- Trenton Corporation
- Treverity
- Tribus Services
- Trico Surveying and Mapping Inc.
- Trimble Energy
- TT Technologies, Inc.
- Tubis LLC
- ULC Robotics
- Ultrafryer Systems, Inc.
- UMS Group Inc.
- Underground Construction Co., Inc.
- Unearth
- United Rentals Trench Safety
- Universal Vortex, Inc.
- UPSCO Inc.
- Urbint
- USIC
- Utilicor Technologies Inc.
- Utilities and Industries
- UtiliQuest LLC
- Utilities International, Inc.
- Utility Line Services, Inc.
- Utility Resource Group, LLC
- Utilligent
- Valdes Engineering Company
- Valtronics and Mustang Sampling
- Van Ness Feldman LLP
- Vega Energy Partners Ltd.
- Veriforce
- Vermeer Corporation
- Victaulic Company
- Volkert
- Wade Trim
- Waste Management
- Water Integrated Treatment Systems LLC
- Weatherford
- Westinghouse
- WFMS, Inc.
- Whitman Consulting Organization, Inc.
- Williams Furnace Company
- Witt O'Brien's, LLC
- WL Plastics Corp.
- Wolseley Industrial
- World Wide Nondestructive Testing
- Wright & Talisman, P.C.
- WRS Environmental Services
- WSB
- WSP USA
- YANMAR America Corporation
- YZ Systems, Inc.
- Air-Conditioning, Heating and Refrigeration Institute
- Alabama Natural Gas Association
- American Public Gas Association
- Arkansas Gas Association
- Canadian Gas Association
- Energy Association of Pennsylvania
- Florida Natural Gas Association
- Illinois Energy Association
- Indiana Energy Association, Inc.
- Interstate Natural Gas Association of America
- Iowa Natural Gas Association
- Kentucky Gas Association
- Michigan Electric & Gas Association
- Midwest ENERGY Association
- Missouri Energy Development Association
- National Propane Gas Association
- New Jersey Utilities Association
- New Mexico Oil & Gas Association
- Northeast Gas Association
- Northwest Gas Association
- Ohio Gas Association
- Ontario Energy Association
- Southern Gas Association
- Tennessee Gas Association
- Texas Gas Association
- West Virginia Oil and Natural Gas Association
- Western Energy Institute
- Wisconsin Utilities Association
- Argentine Petroleum & Gas Institute
- Asociacion Mexicana De Gas Natural A.C.
- Austrian Association for Gas & Water Industries
- Council for Oil & Gas Industry
- Danish Gas Technical Association
- DVGW, The German Technical and Scientific Association on Gas and Water
- Energy Supply Association of Australia Limited
- French Gas Association
- Institution of Gas Engineers & Managers
- International Gas Union
- Natural Gas Society
- Petroleum Institute of Pakistan
- Polish Assoc. of Sanitary Engineers & Technicians
- Royal Belgium Gas Association
- Royal Dutch Gas Association - KVGN
- Swedish Gas Association
- Swiss Gas and Water Industry Association
- The Japan Gas Association
- The Korea Gas Union