Access Midstream (Williams)Tulsa, OK
AECOMDenver, CO; Houston, TX; Pittsburgh, PA
Aegion CorporationHouston, TX
All American SurveyingGainesville, TX
Allied CorrosionMarietta, GA; Houston, TX
Allseas Group S.A.The Netherlands
Alpha Leak Detection & Pipeline ServicesKemah, TX
AMEC Foster WheelerHouston, TX
Anadarko PetroleumThe Woodlands, TX
Andeavor (Marathon Petroleum)San Antonio, TX
Applied Consulting Field ServicesLongview, TX
ARB MidstreamGlendale, CO
ArdurraTampa, FL
Arrow SurveyingTunkhannock, PA
As-Built Modeling ServicesLumberton, MS
Ascent Geomatics SolutionsDenver, CO
Aspen Corrosion, Inc.Houston, TX
Atlas EngineeringHouston, TX; New Orleans, LA; Aberdeen, Scotland
AtwellHouston, TX; Pittsburgh, PA; San Antonio, TX
Audubon Field SolutionsHouston, TX; Tulsa, OK
Avery Land ServicesHenderson, NV
Avery Technical Resources, Inc.Odessa, TX
Baker HughesHouston, TX; Calgary, Canada
Bartlett & WestBismarck, ND; Topeka, KS
BechtelHouston, TX; Frederick, MD
BL CompaniesPittsburgh, PA
Blue Mountain, Inc.Burton, WV
Boardwalk Pipeline Partners LPHouston, TX; Owensboro, KY
Borton-LawsonWilkes-Barre, PA
Bourland SurveyingColdspring, TX
Bowman ConsultingPittsburgh, PA
BPHouston, TX; Calgary, AB Canada
Brown and Root Industrial ServicesBaton Rouge, LA; West Monroe, LA
Buckeye Partners, L.P.Houston, TX
Burns & McDonnellHouston, TX; Kansas City, MO
Burrow Global ServicesHouston, TX
C.H. Fenstermaker & AssociatesLafayette, LA; Houston, TX
Cadd Data, Inc.Guaynabo, P.R.
CAM Integrated SolutionsHouston, TX; Denver, CO
Campos EPCDenver, CO
CAMS TridentBaytown, TX
Cardno Inc.Houston, TX
Carnegie Strategic Design EngineersHouston, TX; Pittsburgh, PA
Caw ConsultantsMason, TX
CCI Inc.Houston, TX; Cochrane, AB, Canada
CEI Engineering AssociatesBentonville, AR
CEM Resources, Inc.Houston, TX; Fellsmere, FL
Centro ResourcesFort Worth, TX
Centurion PipelineHouston, TX
CH2M (Jacobs)Houston, TX; Denver, CO; Bellevue, WA
Chenault Consulting, Inc.Farmington, NM
Cheniere EnergyHouston, TX
Chesapeake EnergyFort Worth, TX; Oklahoma City, OK
Chester EngineersMoon Township, PA
ChevronHouston, TX
Chippewa ResourcesMinot, ND
CimarexDenver, CO; Tulsa, OK; Midland, TX
Cimarron Engineering, Ltd.Calgary, AB, Canada
Civil Engineering ConsultantsSan Antonio, TX
Civil & Environmental ConsultantsBridgeport, WV
CobbFendleyHouston, TX
Connect EngineerCalgary, AB, Canada
ConocoPhillipsHouston, TX
Consolidated Contractors CompanyAthens, Greece; Brisbane, Australia; Dubai, U.A.E
Contract Land StaffSugar Land, TX
Cornerstone Engineering ServicesScarborough, ME
CorrPro CanadaEdmonton, AB, Canada
Corrosion ServiceOntario, Canada
CountryMarkIndianapolis, IN
CPPShanghai, China
Crafton TullConway, AR
Crestwood Midstream Partners LPHouston, TX
Crimson PipelineLong Beach, CA
Cross Texas Land ServicesMason, TX
CSD Engineers LLCHouston, TX; Pittsburgh, PA
D3 Survey and MappingFt. Worth, TX
Damian & AssociatesFreeport, TX
Datapoint Surveying & MappingSan Antonio, TX
Dawood Engineering, IncSturbridge, MA
DCP MidstreamHouston, TX
DECCA EnergySugar Land, TX
Delta Field ServicesLa Porte, TX
Denbury Resources, Inc.Plano, TX
Devon EnergyHouston, TX; Oklahoma City, OK
Diversified Infrastructure ServicesMadison, WI
Downtown Design Services Inc.Denver, CO; Tulsa, OK
Doyle & Wachtstetter, Inc.Clute, TX
The EADS GroupSomerset, PA
EDM ServicesSimi Valley, CA
Egan Field & NowakNew Brighton, MN
EMC, Inc.Grenada, MS
EN EngineeringWoodridge, IL
Enable Midstream PartnersOklahoma City, OK
EnbridgeHouston, TX; Superior, WI; Edmonton, AB, Canada
Encompass Energy ServicesHouston, TX
Ener-DataHouston, TX
Energy Land & InfrastructureNashville, TN
Energy TransferHouston, TX
Engineering ServiceJackson, MS
ENGlobalHouston, TX; Tulsa, OK
EnSite USAHouston, TX; Versailles, KY
Enterprise Products PartnersHouston, TX
Equinor (Statoil)Houston, TX
Equinox Engineering Ltd.Calgary, AB, Canada
Equitrans MidstreamPittsburgh, PA
Equistar ChemicalsHouston, TX
Erickson Contract SurveyingSidney, MT
EricssonPlano, TX; Santa Clara, CA
ERM Group, IncLondon, United Kingdom
ESBAARMuscat, Oman
Excel MidstreamHouston, TX
exp Global Inc.Houston, TX; Tulsa, OK
Farnsworth GroupHouston, TX
Fenix SolutionsHouston, TX
Fisher AssociatesBuffalo, NY
FluorHouston, TX; Camberley, UK; Calgary, AB, Canada
Frontier Surveying CompanyFort Worth, TX
FSC, Inc.Ft. Worth, TX
FugroHouston, TX
G2 Partners, LLCHouston, TX
GAI ConsultantsHomestead, PA
Ganem & Kelly SurveyingPoint Comfort, TX
Gateway Services GroupFort Worth, TX
GeoEngineersSeattle, WA
Geophysical Data ManagementDallas, TX
GeoTerra Integrated Resource SystemPrince George, BC, Canada
Golden Field ServiceTulsa, OK
Golder AssociatesCalgary, AB, Canada
Gulf Interstate EngineeringHouston, TX
GullettHouston, TX
Halff Associates, Inc.Forth Worth, TX; Midland, TX
Halker ConsultingEnglewood, CO
Hanson SurveyHouston, TX
Herbert, Rowland & GrubicCranberry Township, PA
Hiland Partners (Kinder Morgan)Enid, OK
Holland EngineeringHolland, MI
Howland Engineering & SurveyingLaredo, TX
Hunt, Guillot & AssociatesRuston, LA
Ingenieria DennisMexicali B.C., Mexico
Integrated GeomaticsCalgary, AB, Canada
Integrated Pipeline ServicesCanonsburg, PA; Tulsa, OK
Integrity EPCParker, CO
Integrity Positions, LLCBrownsboro, TX
Jacobs Engineering GroupSan Antonio, Austin & Fort Worth, TX
JHA CompaniesNew Milford, PA
JN ServicesHudson Oaks, TX
John Chance Land SurveysLafayette, LA
Johnston-VermetteMontreal, CA
JTAM EngineeringHouston, TX
K2D Consulting EngineersMarina del Ray, CA
KBRHouston, TX; Brisbane, Australia
Kestrel EngineeringHouston, TX
Keystone ConsultingCarnegie, PA
Kinder MorganHouston, TX; Lakewood, CO; Orange, CA
KleinfelderSan Diego, CA
KLJBismarck, ND
L&S SurveyingSan Fernando, Trinidad
Lake Superior ConsultingDuluth, MN
Lamb-Star EngineeringPlano, TX
Landmark Surveying & EngineeringBakersfield, CA
Landmark Survey and MappingWashington, PA
LandpointBossier City, LA
Larson Design GroupWilliamsport, PA
Lauren ServicesCalgary, AB, Canada
Legacy IntegrityTulsa, OK
Legends Field GroupMcLean, VA
Link Field ServicesMineral Wells, TX
LJABeaumont, TX
Lotus MidstreamSugar Land, TX
LT Mapping ServicesTulsa, OK
LW SurveyDenver, CO; Duluth, MN; Tulsa, OK; Calgary, AB
LyondellBasell IndustriesHouston, TX
LythixMidland, TX
M&H Energy ServicesLafayette, LA; Houston, TX
Markwest (Marathon Petroleum)Denver, CO; Tulsa, OK
MATCOR, Inc.Chalfont, PA
Maverick EngineeringHouston, TX
McClure EngineeringClive, IA
McElhanney Geomatics EngineeringCalgary, AB, Canada
Merestone SurveyingAndover, KS
Meridian Surveying and MappingHouston, TX
Meridian SurveysSaskatoon, SK, Canada
Messinger & AssociatesBastrop, LA
Michael Baker Jr., Inc.Houston, TX
MidAmerican EnergyOmaha, NE
MKEC EngineeringWichita, KS
Morris P. Herbert, Inc.Baton Rouge, LA; Houma, LA; Houston, TX
Mott MacDonaldBirmingham, AL; Austin, TX; Houston, TX
Mountain Valley PipelinePittsburgh, PA
National Pipeline ServicesMt. Pleasant, MI
Nexus Integrity ManagementCorpus Christi, TX
Northern Natural GasOmaha, NE
Novara GeoSolutionsNorwell, MA
NTB Associates, Inc.Shreveport, LA
Obsidian EngineeringCalgary, AB, Canada
Onward ResourcesHouston, TX
Open Range Field ServicesBoerne, TX
Opus Stewart WeirSherwood Park, Alberta
OxyHouston, TX; Midland, TX
Pape-Dawson EngineersSan Antonio, TX
Pelican Energy PartnersHouston, TX
PERC EngineeringHouston, TX
Percheron, LLCKaty, TX
Petersen EngineeringIndianapolis, IN
PetroFacLondon, UK
Petro ITHouston, TX; New Delhi, India
PFC MidstreamBellaire, TX
Pipeline Land ServicesWichita Falls, TX; San Antonio, TX
Pipeline Project ServicesWest Monroe, LA
Plains All American PipelineHouston, TX
Plantation Pipeline CompanyAtlanta, GA
Point EngineeringPort Harcourt, Nigeria
Pond & CompanyNorcross, GA
Prime Energy ServicesHouston, TX
Primoris Services CorporationHouston, TX; Dallas, TX
Project Consulting ServicesHouston, TX; Metairie, LA; Atlanta, GA
Protech EISHardinsburg, KY
QPSETulsa, OK
R SquaredMonroe, LA
Raba Kistner InfrastructureDallas, TX
Rapid Response Project LimitedCalgary, AB, Canada
Republic Field ServicesSan Angelo, TX
Rooney EngineeringCentennial, CO
Rose Rock MidstreamOklahoma City, OK
Russell CorrosionColumbia, MD
S&BHouston, TX
SaipemSan Donato Milanese, Italy
Samuel EngineeringGreenwood Village, CO
SemGroup CorpSalisbury Plain, OK
setldHouston, TX
SGC EngineeringWestbrook, ME
Shafer, Kline & WarrenKansas City, MO; The Woodlands, TX; Tulsa, OK
Sinclair Land SurveyingLeon Valley, TX
SNC LavalinCalgary, AB, Canada
Solaris Management ConsultantsSurrey, B.C.
Southern Design CadworksHouston, TX
Spartan EngineeringTulsa, OK
Spec ServicesOrange County, CA
Spectra Energy (Enbridge)Houston, TX
StantecBuckhannon, WV; Edmonton, AB, Canada
Strike, LLCThe Woodlands, TX
Structural IntegrityCentennial, CO
STV, Inc.Douglassville, PA
Summit MidstreamHouston, TX; Denver, CO
Sunoco, Inc. (Enbridge)Houston, TX
Superior Appalachian PipelineCanonsburg, PA
Survey and Mapping, LLC (SAM)Austin, TX
Tablerock SurveyDenver, CO; The Woodlands, TX
TachusThe Woodlands, TX
Tallgrass EnergyLakewood, CO
Tatweer PetroleumAwali, Kingdom of Bahrain
T. Baker Smith, Inc.Houston, TX; Houma, LA
T.G. MercerOverland Park, KS
TC Energy (TransCanada)Houston, TX; Calgary, AB, Canada
Technical Design ServicesDuluth, MN
Terra TechHouston, TX
Territorial Landworks, Inc.Missoula, MT
The Thrasher GroupBridgeport, WV
Three Streams EngineeringCalgary, AB, Canada
TIMSPearland, TX
Titan CorrosionTomball, TX
TMI Solutions, LLCHouston, TX; George West, TX
TopographicPampa, TX
Trans Adriatic Pipeline (TAP)Greece, Albania, Italy
Transglobal ServicesFort Worth, TX
TRC SolutionsOrange County, CA
Trestles, LLCGoodlettsville, TN
Trico Survey & MappingBloomington, IN
Troy CompaniesHouston, TX
Tucker Energy SolutionsPasadena, TX
UintahVernal, UT
Universal Geomatic SolutionsCalgary, AB; Edmonton, AB
Universal Pegasus InternationalHouston, TX; Lafayette, LA; Calgary, AB
Universal Survey and MappingTulsa, OK
Upside EngineeringCalgary, AB, Canada
Valero EnergySan Antonio, TX
Vanasse Hangen BrustlinWatertown, MA
VerbrecBrisbane City, QLD, Australia
Virtual GISDuluth, MN
Wayne Acree, P.L.S., Inc.West Monroe, LA
WBI EnergyBismarck, ND
Weisser Engineering & SurveyingHouston, TX
West Company of MidlandMidland, TX
West Texas ConsultantsAndrews, TX
WestwoodEden Prairie, MN
Whiteley Technical ServicesBeaumont, TX
William H. Smith & AssociatesGrand Junction, CO
WilliamsTulsa, OK
Wilson & Company, Inc.Phoenix, AZ; Corpus Christi, TX
WoodHouston, TX
WorkriseAustin, TX
WorleyHouston, TX; Calgary, AB, Canada
WSB EngineeringMinneapolis, MN
WSP Canada, Inc.Calgary, AB, Canada
WSP USAAnaheim, CA
Xcel EnergyDenver, CO
Xcl MidstreamCanonsburg, PA
Zion EngineeringGreenwood Village, CO