APSG Leadership History


The first meeting was November 12, 1997 at the Omni Hotel, Houston. 18 interested people discussed the prospects for setting up an association. Jean-Patrick Girbig chaired the meeting. Roger Lott recorded minutes. Mike Chamberlain volunteered as APSG Chair on formation. The Articles of Association were formalised on May 18, 1999.

Without the help of the past Officers & Committees, APSG would not continue to this day. We would like to thank all of our current and past Officers & Committees for all their hard work. Please visit the links below to view our past Officers & Committees.




Past APSG Chairs

APSG Central Chapter


  • Mike Chamberlain (ARCO International) 1998 - 1999
  • Barry Barrs (Exxon) 1999 - 2000
  • Barry Barrs (Exxon) 2000 - 2001
  • George Buhler (BP Amoco) 2001 - 2002
  • Hugh Beattie (Exploration Geodesy) 2002 - 2003
  • Kevin Crozier (PGS) 2003 - 2004
  • Jon Stigant (Devon Energy) 2004 - 2005
  • Jim Cain (Cain & Barnes LP) 2005 - 2006
  • John Conner (EnSoCo) 2006 - 2007
  • Bruce Carter (BP) 2007 - 2008
  • Michael Barnes (Cain & Barnes LP) 2008 - 2009
  • Jay Hollingsworth (Schlumberger) 2009 - 2010
  • Ellen West Nodwell (Hess Corporation) 2010 - 2011
  • Jonathan Davis (BP) 2011 - 2012
  • Dave Byrne (Anadarko Petroleum) 2012 - 2013
  • Jason Humber (Integrated Informatics Inc.) 2017-2018

APSG West Chapter


  • Jan Van Sickle (Van Sickle LLC) 2011 - 2012

APSG Canada Chapter


  • Roman Abdoullaev (Talisman Energy) 2011 - 2012


Past APSG Vice Chairs


APSG Central Chapter


  • Dean Mikkelsen (GeoQuest) 1998 - 1999
  • Michael Barnes (Racal Survey) 1999 - 2000
  • Michael Barnes (Racal Survey) 2000 - 2001
  • Hugh Beattie (Exploration Geodesy) 2001 - 2002
  • Kevin Crozier (PGS) 2002 - 2003
  • Jon Stigant (Devon) 2003 - 2004
  • Jim Cain (Cain & Barnes LP) 2004 - 2005
  • John Connor (EnSoCo) 2005 - 2006
  • Bruce Carter (BP) 2006 - 2007
  • Michael Barnes (Cain & Barnes LP) 2007 - 2008
  • Jay Hollingsworth (Schlumberger) 2008 - 2009
  • Ellen West Nodwell (Hess Corporation) 2009 - 2010
  • Jonathan Davis (BP) 2010 - 2011
  • Dave Byrne (Anadarko) 2011 - 2012
  • Jackie Portsmouth (Santos Inc.) 2012 - 2013
  • Kelly Kore (ExxonMobil) 2017-2018


APSG West Chapter


  • John Farrell (Fidelity Exploration & Production) 2011 - 2012


APSG West Chapter


  • Mark Dumka (Dumka Consulting Inc.) 2011 - 2012


Past APSG Secretaries & Treasurers


APSG Central Chapter


  • Pat Wheeler-Holohan (Exploration Geodesy) 1998 - 1999
  • Phil Summerfield (Mobil) 1999 - 2000
  • None 2000 - 2001
  • Dean Mikkelsen 2001 - 2002
  • Bish Karko (EnsoCo) 2002 - 2003
  • Bish Karko (EnsoCo) 2003 - 2004
  • Bish Karko (EnSoCo) 2004 - 2005
  • Hugh Beattie (Exploration Geodesy) 2005 - 2006
  • Hugh Beattie (Exploration Geodesy) 2006 - 2007
  • Brain Schostak (Shell E&P) 2007 - 2008
  • Brian Schostak (Shell E&P) 2008 - 2009
  • Melissa Wood (Fugro GeoServices) 2009 - 2010
  • Melissa Wood (Fugro GeoServices) 2010 - 2011
  • Jose Alvarenga (EnSoCo) 2011 - 2012
  • Jose Alvarenga (EnSoCo) 2012 - 2013

APSG West Chapter


  • Robert White (White Star Corp.) 2001 - 2012

APSG Canada Chapter


  • John Spreen (Paladin Positioning) 2011 - 2012


Past Chairs of Education


APSG Central Chapter


  • Brian Schostak (Shell) 1999 - 2000
  • Jon Stigant (Chevron) 2000 - 2001
  • None 2001 - 2002
  • None 2002 - 2003
  • Martin Rayson (Quest) 2003 - 2004
  • Hugh Beattie (Exploration Geodesy) 2004 - 2005
  • Jon Stigant (Devon) 2005 - 2006
  • Jon Stigant (Devon) 2006 - 2007
  • Jon Stigant (Devon) 2007 - 2008
  • Jonathan Davis (BP) 2008 - 2009
  • Jonathan Davis (BP) 2009 - 2010
  • Dave Byrne (Anadarko) 2010 - 2011
  • Ashok Wadwani (Applied Field Data Systems) 2011 - 2012
  • Ashok Wadwani (Applied Field Data Systems) 2012 - 2013
  • Jennifer Still (Integrated Informatics Inc.) 2017 - 2018


Past Chairs of Membership


APSG Central Chapter


  • Patrick Wheeler-Holohan (Exploration Geodesy Inc.) 1998 - 1999
  • Patrick Wheeler-Holohan (Exploration Geodesy Inc.) 1999 - 2000
  • Michael Barnes (Racal Survey) 2000 - 2001
  • Barry Barrs (ExxonMobil) 2001 - 2002
  • Barry Barrs (ExxonMobil) 2002 - 2003
  • Barry Barrs (ExxonMobil) 2003 - 2004
  • Barry Barrs (ExxonMobil) 2004 - 2005
  • Barry Barrs (ExxonMobil) 2005 - 2006
  • Barry Barrs (ExxonMobil) 2006 - 2007
  • Barry Barrs (ExxonMobil) 2007 - 2008
  • Kris Berglund (Blue Marble) 2008 - 2009
  • Kris Berglund (Blue Marble) 2009 - 2010
  • Michael Barnes (Cain & Barnes LP) 2010 - 2011
  • Melissa Wood (Fugro Geoservices) 2011 - 2012
  • Steve Long (Shell) 2012 - 2013

APSG West Chapter


  • Bill Emison (Merrick & Company) 2011 - 2012

APSG Canada Chapter


  • Sean Callaghan (Surveyza Consulting Ltd.) 2011 - 2012
  • Richard Andrews (Spatial Technologies) 2012 - 2013


Past Chairs of Communications


APSG Central Chapter


  • Alma Alling (Ayala) 2010 - 2011
  • Alma Alling (Ayala) 2011 - 2012
  • Alma Alling (Ayala) 2012 - 2013


Past Chairs of Nominations


APSG Central Chapter


  • Phil Summerfield (Mobil) 2000 - 2001
  • None 2001 - 2002
  • Hugh Beattie (Exploration Geodesy) 2002 - 2003
  • None 2003 - 2004
  • Jon Stigant (Devon) 2004 - 2005
  • Jim Cain (Cain & Barnes LP) 2005 - 2006
  • Bruce Carter (BP) 2006 - 2007
  • Bruce Carter (BP) 2007 - 2008
  • Jim Cain (Cain & Barnes LP) 2008 - 2009
  • Jim Cain (Cain & Barnes LP) 2009 - 2010
  • Jim Cain (Cain & Barnes LP) 2010 - 2011
  • Kevin Crozier (Devon) 2011 - 2012
  • Kevin Crozier (Devon) 2012 - 2013


Past Chairs of Strategic Technical Advisory Committee (STAC)


APSG Central Chapter


  • Barry Barrs (ExxonMobil) 2004 - 2005
  • Barry Barrs (ExxonMobil) 2005 - 2006
  • Barry Barrs (ExxonMobil) 2006 - 2007
  • Barry Barrs (ExxonMobil) 2007 - 2008
  • Barry Barrs (ExxonMobil) 2008 - 2009
  • Barry Barrs (ExxonMobil) 2009 - 2010
  • Barry Barrs (ExxonMobil) 2010 - 2011
  • Barry Barrs (ExxonMobil) 2011 - 2012
  • Barry Barrs (ExxonMobil) 2012 - 2013

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