Document:

exv4w5

Exhibit 4.5

Consent of Mark O’Dea

     I, Mark O’Dea, hereby confirm that I have read the Offer and Circular of Fronteer Development
Group Inc. (the “Company”) furnished with the Company’s offer dated January 23, 2009 to purchase
all of the issued and outstanding common shares of Aurora Energy Resources Inc., which Offer and
Circular incorporates by reference the Company’s annual information form dated March 27, 2008 for
the year ended December 31, 2007 (the “AIF”).

     I hereby consent to the use of my name in connection with references to my preparation or
involvement in the preparation of the technical report dated November 1, 2007 entitled “The
Exploration Activities of Aurora Energy Resources Inc. on the CMB Uranium Property, Labrador,
Canada, During the Period January 1, 2007 to December 31, 2007” prepared together with Gary Giroux,
Dr. D.H.C. Wilton, Jim Lincoln, Christopher Lee and Ian Cunningham-Dunlop (the “Technical Report”)
in the AIF or other documents incorporated by reference therein. I further consent to the
inclusion in the Offer and Circular and the registration statement on Form F-8 filed with the
United States Securities and Exchange Commission (the “Registration Statement”) of the Technical
Report (through the inclusion by way of incorporation by reference of the AIF in the Offer and
Circular) and of extracts from or a summary of the Technical Report in the Offer and Circular and
the Registration Statement or any documents incorporated by reference therein.

     I also hereby confirm that I have read the Technical Report and extracts from or a summary of
the Technical Report contained in the Offer and Circular and the Registration Statement by way of
incorporation by reference of the AIF and that I have no reason to believe there are any
misrepresentations in the information contained therein that is derived from the Technical Report
or that is within my knowledge as a result of the services that I have performed in connection with
the Technical Report.

	 	 	 	 	 
	 	 	 
	January 23, 2009 	  	(signed) Mark O’Dea
 	 
	 	 	Mark O’Dea, P.Geo.exv4w6

Exhibit 4.6

Consent of Jim Lincoln

     I, Jim Lincoln, hereby confirm that I have read the Offer and Circular of Fronteer Development
Group Inc. (the “Company”) furnished with the Company’s offer dated January 23, 2009 to purchase
all of the issued and outstanding common shares of Aurora Energy Resources Inc., which Offer and
Circular incorporates by reference the Company’s annual information form dated March 27, 2008 for
the year ended December 31, 2007 (the “AIF”).

     I hereby consent to the use of my name in connection with references to my preparation or
involvement in the preparation of the technical report dated November 1, 2007 entitled “The
Exploration Activities of Aurora Energy Resources Inc. on the CMB Uranium Property, Labrador,
Canada, During the Period January 1, 2007 to December 31, 2007” prepared together with Gary Giroux,
Dr. D.H.C. Wilton, Mark O’Dea, Christopher Lee and Ian Cunningham-Dunlop (the “Technical Report”)
in the AIF or other documents incorporated by reference therein. I further consent to the
inclusion in the Offer and Circular and the registration statement on Form F-8 filed with the
United States Securities and Exchange Commission (the “Registration Statement”) of the Technical
Report (through the inclusion by way of incorporation by reference of the AIF in the Offer and
Circular) and of extracts from or a summary of the Technical Report in the Offer and Circular and
the Registration Statement or any documents incorporated by reference therein.

     I also hereby confirm that I have read the Technical Report and extracts from or a summary of
the Technical Report contained in the Offer and Circular and the Registration Statement by way of
incorporation by reference of the AIF and that I have no reason to believe there are any
misrepresentations in the information contained therein that is derived from the Technical Report
or that is within my knowledge as a result of the services that I have performed in connection with
the Technical Report.

	 	 	 	 	 
	 	 	 
	January 23, 2009 	  	(signed) Jim Lincoln
 	 
	 	 	Jim Lincoln, P.Eng.exv4w7

Exhibit 4.7

Consent of Peter Grieve

     I, Peter Grieve, hereby confirm that I have read the Offer and Circular of Fronteer
Development Group Inc. (the “Company”) furnished with the Company’s offer dated January 23, 2009 to
purchase all of the issued and outstanding common shares of Aurora Energy Resources Inc., which
Offer and Circular incorporates by reference the Company’s annual information form dated March 27,
2008 for the year ended December 31, 2007 (the “AIF”).

     I hereby consent to the use of my name in connection with references to my preparation or
involvement in the preparation of the technical report dated March 30, 2007 entitled “Technical
Report on the Pirentepe and Halilaða Exploration Properties, Çanakkale, Western Anatolia, Turkey”
(the “Technical Report”) in the AIF or other documents incorporated by reference therein. I
further consent to the inclusion in the Offer and Circular and the registration statement on Form
F-8 filed with the United States Securities and Exchange Commission (the “Registration Statement”)
of the Technical Report (through the inclusion by way of incorporation by reference of the AIF in
the Offer and Circular) and of extracts from or a summary of the Technical Report in the Offer and
Circular and the Registration Statement or any documents incorporated by reference therein.

     I also hereby confirm that I have read the Technical Report and extracts from or a summary of
the Technical Report contained in the Offer and Circular and the Registration Statement by way of
incorporation by reference of the AIF and that I have no reason to believe there are any
misrepresentations in the information contained therein that is derived from the Technical Report
or that is within my knowledge as a result of the services that I have performed in connection with
the Technical Report.

	 	 	 	 	 
	 	 	 
	January 23, 2009 	  	(signed) Peter Grieve
 	 
	 	 	Peter Grieve, M.Sc., M.A.I.G.exv4w8

Exhibit 4.8

Consent of Michael M. Gustin

     I, Michael M. Gustin, hereby confirm that I have read the Offer and Circular of Fronteer
Development Group Inc. (the “Company”) furnished with the Company’s offer dated January 23, 2009 to
purchase all of the issued and outstanding common shares of Aurora Energy Resources Inc., which
Offer and Circular incorporates by reference the Company’s annual information form dated March 27,
2008 for the year ended December 31, 2007 (the “AIF”).

     I hereby consent to the use of my name in connection with references to my preparation or
involvement in the preparation of the following technical reports in the AIF or other documents
incorporated by reference therein: (i) the technical report dated November 1, 2007 entitled
“Updated Technical Report, Sandman Gold Project, Humboldt County, Nevada, USA” prepared together
with George Lanier and Jim Ashton, (ii) the technical report dated May 31, 2007 entitled “Updated
Technical Report, Sandman Gold Project, Humboldt County, Nevada, USA” prepared together with George
Lanier and Jim Ashton, (iii) the technical report dated November 1, 2007 entitled “Updated
Technical Report Northumberland Project, Nye County, Nevada, USA” prepared together with George
Lanier and Steven Ristorcelli, and (iv) the technical report dated July 15, 2006 entitled
“Technical Report Northumberland Project, Nye County, Nevada, USA” prepared together with George
Lanier and Steven Ristorcelli (collectively, the “Technical Reports”). I further consent to the
inclusion in the Offer and Circular and the registration statement on Form F-8 filed with the
United States Securities and Exchange Commission (the “Registration Statement”) of the Technical
Reports (through the inclusion by way of incorporation by reference of the AIF in the Offer and
Circular) and of extracts from or a summary of the Technical Reports in the Offer and Circular and
the Registration Statement or any documents incorporated by reference therein.

     I also hereby confirm that I have read the Technical Reports and extracts from or a summary of
the Technical Reports contained in the Offer and Circular and the Registration Statement by way of
incorporation by reference of the AIF and that I have no reason to believe there are any
misrepresentations in the information contained therein that is derived from the Technical Reports
or that is within my knowledge as a result of the services that I have performed in connection with
the Technical Reports.

	 	 	 	 	 
	 	 	 
	January 23, 2009 	  	(signed) Michael M. Gustin
 	 
	 	 	Michael M. Gustin, R.P.Geo.exv4w9

Exhibit 4.9

Consent of George Lanier

     I, George Lanier, hereby confirm that I have read the Offer and Circular of Fronteer
Development Group Inc. (the “Company”) furnished with the Company’s offer dated January 23, 2009 to
purchase all of the issued and outstanding common shares of Aurora Energy Resources Inc., which
Offer and Circular incorporates by reference the Company’s annual information form dated March 27,
2008 for the year ended December 31, 2007 (the “AIF”).

     I hereby consent to the use of my name in connection with references to my preparation or
involvement in the preparation of the following technical reports in the AIF or other documents
incorporated by reference therein: (i) the technical report dated November 1, 2007 entitled
“Updated Technical Report, Sandman Gold Project, Humboldt County, Nevada, USA” prepared together
with Michael M. Gustin and Jim Ashton, (ii) the technical report dated May 31, 2007 entitled
“Updated Technical Report, Sandman Gold Project, Humboldt County, Nevada, USA” prepared together
with Michael M. Gustin and Jim Ashton, (iii) the technical report dated November 1, 2007 entitled
“Updated Technical Report Northumberland Project, Nye County, Nevada, USA” prepared together with
Michael M. Gustin and Steven Ristorcelli, and (iv) the technical report dated July 15, 2006
entitled “Technical Report Northumberland Project, Nye County, Nevada, USA” prepared together with
Michael M. Gustin and Steven Ristorcelli (collectively, the “Technical Reports”). I further
consent to the inclusion in the Offer and Circular and the registration statement on Form F-8 filed
with the United States Securities and Exchange Commission (the “Registration Statement”) of the
Technical Reports (through the inclusion by way of incorporation by reference of the AIF in the
Offer and Circular) and of extracts from or a summary of the Technical Reports in the Offer and
Circular and the Registration Statement or any documents incorporated by reference therein.

     I also hereby confirm that I have read the Technical Reports and extracts from or a summary of
the Technical Reports contained in the Offer and Circular and the Registration Statement by way of
incorporation by reference of the AIF and that I have no reason to believe there are any
misrepresentations in the information contained therein that is derived from the Technical Reports
or that is within my knowledge as a result of the services that I have performed in connection with
the Technical Reports.

	 	 	 	 	 
	 	 	 
	January 23, 2009 	  	(signed) George Lanier
 	 
	 	 	George Lanier

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