Our Team

North-South Environmental Inc. is a team of dedicated professionals with expertise in a wide range of ecological disciplines. We emphasize and encourage exemplary, technical understanding, as we believe this is the basis for sound analysis and defensible products.

Our team holds recognized certifications in the following areas:

  • Ecological Land Classification (MNRF)
  • Ontario Wetland Evaluations (MNRF)
  • Butternut Health Assessment (MNRF)
  • Data Sensitivity Training (MNRF)
  • ISA Certified Arborist
  • St. John Ambulance First Aid
  • Bat Maternity Habitat Evaluation (MNRF)
  • Bird and Bat Post Monitoring Protocol
  • Ontario Stream Assessment Protocol
  • Class 2 Backpack Electrofishing

Mirek Sharp B.E.S. (Waterloo), M.Sc. (Guelph)

Mirek Sharp

Mirek is a founding principal of North-South Environmental Inc. and has been working in the field of ecology since 1978, with over 30 years of experience as a consultant working for clients in the public and private sectors. Mirek’s experience encompasses: environmental policy development, terrestrial resource inventory and monitoring, resource management plans, natural area designation and protection, ecological restoration and environmental impact analyses for a variety of undertakings. Mirek has directed numerous peer reviews and supervised the development of several Natural Heritage Systems. He has published in refereed journals, presented at conferences, provided expert testimony to the Ontario Municipal Board, and authored over 200 technical reports.

Sal Spitale B.Sc. (Western), M.E.S. (Waterloo), ISA Certified Arborist

Sal Spitale

Sal is a principal and co-owner of North-South Environment Inc., and has been working in business management since 2001; exclusively in the field of ecology since 2006. Sal’s experience encompasses authoring and leading environmental impact studies, Species at Risk surveys, tree inventories and health assessments, ecological restoration plans, invasive species management plans, and peer reviews of environmental reports. Sal has described vegetation communities, and identified plants and animals throughout southern Ontario. He is qualified to complete Ecological Land Classifications, Wetland Evaluations, and is an ISA Certified Arborist. Sal has published in refereed journals, been a guest lecturer at the University of Waterloo and presented at conferences. Sal has also provided expert testimony before the Ontario Municipal Board and Environmental Review Tribunal.

Sarah K. Mainguy B.Sc. (Acadia), M.Sc. (Guelph)

Sarah Mainguy

Sarah has over 25 years of experience as a consulting ecologist working in Ontario, Alberta, Nova Scotia, New Brunswick, Quebec, and the mid-western and eastern United States. She has expertise in managing integrated wildlife and botanical studies for terrestrial and wetland ecosystems, in agricultural, urban and wilderness landscapes. Her extensive field skills include identification of both flora and fauna and she is qualified to undertake Ecological Land Classification and Wetland Evaluations. She has special expertise with Species at Risk and the development of mediation measure to mitigate impacts from various forms of development. Sarah has provided expert testimony before the Ontario Municipal Board and provincial court.

Leah Lefler B.Sc. (Dalhousie), M.E.S. (Waterloo)

Leah Lefler

Leah has been working in the field of ecology since 2005. Through her Masters she specialized in forest ecology and ecosystem restoration. Leah is qualified to complete wetland evaluations, Ecological Land Classification and Butternut health assessments using Ontario’s provincial protocols. She has completed numerous floral and faunal surveys, as well as assessments of significant wildlife habitat. Her work experience includes Natural Heritage System planning, refining natural heritage Official Plan policies, completing natural areas inventories, and identifying significant natural heritage features including Species at Risk and their habitats. She has worked within multi-disciplinary teams on resource management-related projects to inform watershed, natural area and parks master planning.

Holly Dodds B.Sc. (Guelph), M.Sc. (Guelph)

Holly Dodds

Holly Dodds has been working in the field of ecology since 2005 with experience in ecological monitoring, wildlife inventory, and Species at Risk assessments. She has lead rigorous individual and habitat assessment surveys for reptiles, amphibians, mammals, birds, insects, and plants in support of infrastructure development, remediation, and environmental risk assessments. She has secured permits and authorizations under Ontario’s Endangered Species Act, as well as developed innovative overall benefit approaches in support of major permit applications. Holly’s expertise also includes habitat connectivity and wildlife linkages, and analyzing wildlife movement patterns and habitat features to promote permeability across large systems. She has contributed to the design, construction, compliance, and effectiveness monitoring of wildlife crossing structures. Holly is qualified to complete Ecological Land Classification and Butternut Health Assessments, and has completed extensive coursework in acoustic analysis (bats), erosion and sediment control, stream rehabilitation, and water management. She speaks fluent English and French.

Samantha Hughes B.A. Biology, PG[ER]

Samantha Hughes

Samantha has worked in the field of wildlife biology since 2010 and been with North-South Environmental since 2014. She has completed training in Ontario Wetland Evaluation System and Ontario Benthos Biomonitoring Network. Samantha has experience in monitoring surveys, on-site restoration, and implementing conservation efforts for the protection of species at risk. She is adept at frog call surveys, salamander surveys, wildlife inventories, and wildlife mark-recapture studies. In addition to field surveys, Samantha has monitored the installation of wildlife passageways in response to mitigating development impacts. She has been involved in sub-watershed studies, Class Environmental Assessments, and Environmental Impact Studies. Samantha provides office support through data entry and analysis, database management, proposals, reports, and background research. 

Pauline K. Catling B.Sc. (Guelph), M.Sc. (Manitoba)

Pauline Catling

Pauline Catling has been working on ecology projects since 2006. This includes vegetation surveys (in a variety of ecosystems), ecosystem restoration, frog call surveys, wetland breeding bird surveys and species at risk monitoring (plants, amphibians, reptiles and birds), using a variety of field methodologies. Through her Masters she classified and described alvar vegetation communities and assessed the environmental and disturbance factors that regulate species composition. Pauline has conducted and managed a variety of projects, including cooperative efforts between multi-disciplinary teams. She has published in journals and presented at international conferences. In addition to fieldwork, Pauline provides office support through data entry and analysis, database management, background research, literature reviews, and report preparation.


Brent Tegler B.Sc. (Toronto), M.Sc. (McMaster), Ph.D. (Guelph)

Brent Tegler

Brent was a co-founder of North-South Environmental Inc. and is a Senior Associate with the Heron Group LLC. He has been working in the field of ecology for over 25 years with experience in the development of Natural Heritage Systems, environmental impact analyses, design of monitoring programs and development of environmental management strategies for sustainable resource utilization in temperate, tropical, and arctic ecosystems. Brent has appeared as an expert witness before the Ontario Municipal Board. Brent has a particular interest and experience with the ecology of tropical systems, and knowledge of the varied socio-cultural conditions which influence them, working in Bangladesh, Jordan, Mali, Nigeria, Papua New Guinea, Sierra Leone and the Solomon Islands.

Daryl W. Cowell M.Sc. (McMaster), P.Geo. (Assoc. Prof. Geoscientists of Ontario)

Daryl Cowell

Daryl is a Professional Geoscientist with specialties in karst hydrogeology and geomorphology, glacial landforms, wetland soils and hydrology, and forest soils. He has over 40 years of experience in the public and private sectors and was a co-founder of North-South Environmental Inc. He has worked on multi-disciplinary teams conducting ecological land surveys in northern Ontario. Recent consulting work has included peer review assessments of technical documents associated with proposed residential and quarry developments in southern Ontario, geoscience contributions to Official Plan development (hydrogeology, Significant Valleylands, hydrology), and advice and consultation on Official Plan Amendments. He has also served as an expert witness before the Ontario Municipal Board and the Environmental Review Tribunal.

Richard Czok B.A. (McMaster)

Richard Czok

Since 1993, Richard has specialized in geographical information systems (GIS) as a spatial data analyst. Relevant work experience includes creation and amalgamation of GIS information from a variety of sources, updating existing GIS layers and merging of multiple GIS layers to produce composite maps. He has worked on numerous projects to ensure that digital products are consistent with the varied protocols and standards of many different municipalities. Richard has experience using ArcInfo, ArcView, Surfer, MapInfo, SPANS and AutoCAD, and data input programs such as MS Excel and Access. Richard also has experience in interpretation and mapping of biophysiographic units and site investigation for candidate parks and ANSIs.