Annis O’Sullivan Vollebekk Ltd. is a professional land surveying firm offering clients a full range of services in cadastral, geodetic, engineering, construction, photogrammetric surveys and geographic information systems (GIS). Working in the public interest, we are proud of our reputation as respected surveyors throughout Eastern Ontario and the large number of returning clients who recommend our services.


Geomatics technology and practices have evolved rapidly within the 21st century, becoming more efficient and precise. Annis O’Sullivan Vollebekk Ltd. (AOV) remains on the leading edge of this evolution as we have actively endeavored to maintain a policy of adaptation and improvement to remain at the forefront. As new technology emerges, we test and evaluate prior to incorporating into execution and best practices.

State of the Art Equipment: Trimble TSC7s, Trimble GNSS system, Trimble Total Station

Global positioning satellite technology is utilized as a cost-effective tool for obtaining digital information on numerous projects, including control, legal and topographic surveys. Strictly regimented field procedures and the automated processing of data ensure product quality and accuracy.

AOV has specialty gear for specialty jobs, including UAVs capable of aerial LiDAR and photogrammetry, terrestrial scanners for high precision LiDAR and interior scanning, and USVs for bathymetric topography. Data collected is processed in house by Technologists, Engineers and Ontario Land Surveyors who are fully conversant in AutoCAD, MicroStation, and MicroSurvey.

Our willingness to remain on the leading edge gives us a wealth of knowledge, experience, and capability to get the job done right meeting our clients needs; every time.


Using a combination of GNSS GPS, total station and drone technology, we have completed many large survey projects, which include

Edward H. Herweyer, O.L.S.

Ed Herweyer has been a Partner at Annis, O’Sullivan, Vollebekk Ltd. since 1989, holding the position of Secretary-Treasurer.  Ed plays a critical role for the adaptation and development of expertise in new technology with oversight on office and field priorities. With an outstanding forty-one (41) years of expertise in all surveying portfolios and land development phases, Ed successfully works with municipal and governmental agencies, large utility companies, as well as land developers, contractors, lawyers, and the general public. This expertise and experience includes, but is not limited to the City of Ottawa Light Rail Transit program, legal and geographical information data surveys for Canada Science and Technology Museum Corporation, legal and topographical surveys for Canada Lands Company, and development construction surveys for numerous Ottawa builders and developers. Ed actively supports and uses the end products of AOV’s terrestrial scanning, drone acquisition of LiDAR/photogrammetric data and robotic field survey platforms.  Ed has a love for our community and has been highly involved in charitable giving – a true passion for giving back.

Have a great ride; a cause like this deserves equally great weather, my fingers are crossed!” Ed Herweyer

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V. Andrew Shelp, O.L.S.

Andy Shelp, President, has had an extraordinary career at Annis O’Sullivan Vollebekk Ltd. In 1986, Andy joined our team as an Instrument Person, later becoming an Ontario Land Surveyor and is a successful Partner of the organization since 1999.  With thirty-three (33) years of experience in the industry, Andy has managed a large variety of projects with a primary focus on Condominiums, all forms of Legal Surveys, and our People.  Company culture is a key priority, we are a family, working with the Partners at Annis O’Sullivan Vollebekk Ltd. and not for – this is our success. Andy has a true devotion to the land surveying industry not just provincially, but across the globe.  From managing a firm in Bermuda to President of the Ontario Land Surveyors Association 2022, Andy highly promotes the excellence of the industry – our world mapped.

“People and precision are at the forefront” Andy Shelp

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Dan Vollebekk, O.L.S.

With his 40 years of experience, Dan brings vast knowledge to the firm. He manages the Embrun office of AOV and is responsible for all surveys from Ottawa’s eastern extremity, east to the Quebec border and south to the St. Lawrence River. He has successfully worked with municipalities, federal and provincial governmental agencies, large utility companies, as well as land developers, contractors, lawyers and the general public.

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Travis Hartwick, O.L.S.

Travis Hartwick became a Partner at Annis O’Sullivan Vollebekk Ltd. in 2019.  As Vice President, Travis has thirty (30) years of expertise in the industry with a primary focus in Land Development Severances, Business Development as well as Occupational Health and Safety. In 2015, Travis held the role as President of the Ontario Land Surveyors Association, working to make an impact in the industry, and was a recipient of the David Thompson National Geomatics Award.  As one of the oldest professions in the world, Travis stays true to the roots of land surveying and has an incredible aspiration for growth. Travis works with some of the largest developers in the housing and commercial industries in all of Eastern Ontario.

“All triangles point us in the right direction” Travis Hartwick

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