Meet CEP Calgary's Board
Want to join our amazing team? Keep an eye on volunteer position postings.
Nancie Lefebvre | Chair
Nancie currently focuses her energy on progressing sustainability programs for clients in various industries at Modern West Advisory. She obtained her B.Sc. in Environmental Science with a concentration in Physics from the University of Calgary and worked for eight years as an environmental regulatory consultant in remediation and reclamation. She went back for her M.Sc. in Sustainability Energy Development and pivoted into sustainability consulting and Indigenous relations. She has seven years of experience in the sustainability field.
In addition to volunteering with CEP Calgary, Nancie currently mentors with Big Brothers Big Sisters of Calgary & Area. Nancie values the mentors she has had throughout her career thus far, and looks to incorporate these positive experiences into supporting CEP Calgary.
Nancie enjoys hiking, knitting, and exploring new places. French is her second language and she loves to visit her family in Québec every summer.
Dinu Attalage | Director and Secretary
Dinu Attalage is an Environmental Specialist with over seven years of experience in carbon offset project development, GHG quantification, and emission reduction strategies. She has led technical work on monitoring, reporting, and verification (MRV) systems for both voluntary and compliance carbon markets. Her expertise covers greenhouse gas emissions and removals across sectors including forestry, agriculture, manufacturing, waste, and livestock. Dinu holds a PhD in Environmental Engineering from the University of Calgary and serves as a sessional instructor, teaching courses on sustainability and environmental engineering.
Shawna Adams | Director and Treasurer
As a senior environmental advisor with TC Energy, Shawna has over 15 years of experience at the forefront of integrating environmental governance, risk management, planning and permitting, sustainability and ESG in the energy industry. She provides strategic advice on environmental risks and opportunities on energy projects in Canada, the United States and Mexico, at an individual due diligence level, at the asset management level and an enterprise risk level. Earlier in her career, Shawna held technical positions as an environmental consultant and research assistant in both the private and public sectors.
Shawna spends as much time as possible in nature and is an avid hiker and skier. Her passion for nature and love of learning brought her to CEP Calgary, and she is excited to collaborate with the board, its members, and our incredible industry partners.
Di Su | Director, Marketing and Communications
Di Su is currently pursuing a graduate degree in Environmental Engineering at the University of Calgary. She brings over 13 years of experience in media and 5 years in advertising consulting, with a focus on the fuel and electric vehicle sectors. Her expertise spans marketing strategy, media engagement, and social media management.
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Di is passionate about helping others access industry insights, build professional networks, and identify clear career pathways. She is also dedicated to growing her own skills and contributing to the team's success.
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Beyond her professional pursuits, Di promotes Chinese calligraphy through workshops at the University of Calgary and within the local community. She also enjoys photography, reading, hiking, and cooking, and values quality time with family and friends.
Hannah Li | Director
Hannah is an ESG Project Manager at Stok, where she partners with corporate and real estate investment trust (REIT) clients to advance their sustainability strategies. She supports clients with ESG disclosures, reporting, and program development, helping them navigate evolving regulatory requirements, respond to investor expectations, and embed sustainability into long-term business value.
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She is currently completing her MBA in Finance at the University of Calgary. Hannah brings a strong foundation in education and stakeholder engagement from her earlier career as a teacher, skills she now applies to building trust and facilitating collaboration in the sustainability field.
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Passionate about advancing ESG and sustainability, Hannah is excited to contribute her expertise to CEP Calgary and foster dialogue among professionals driving positive change.
Diane Spence | Director
Diane is an innovative problem solver and project manager, focused on delivering sustainable solutions in water projects,. She is a Project Manager at Integrated Sustainability.
After gaining her Civil Engineering Technology diploma in Moncton, NB, she moved to Calgary in 2004 and explored various service roles in the oil and gas industry before moving to San Francisco in 1999, establishing her career in municipal water and transportation engineering projects. In 2004, she returned to Calgary and continued exploring municipal engineering projects throughout Alberta, Saskatchewan and British Columbia and obtained her Professional Project Management designation in 2015. Eventually moving back into the oil and gas industry, she developed knowledge and skills in the oil and water management business sector, creating opportunities that provided a strong understanding of the environmental and regulatory components to this sector.
Although Diane's family resides in New Brunswick, and she visits often, the magnificent network of friends and lifestyle developed in the mountain energy has kept Diane in Calgary. When she's not mountain biking, xc skiing or hiking with her dog, you can also find Diane volunteering with seniors and pet therapy and supporting the scholarship foundation within a local Kiwanis chapter.
Adam Schwarz | Director
Adam is the Director of Corporate Sustainability at Delphi, a Canadian-based consulting firm specializing in sustainability, climate change, and ESG. He leads strategic projects across sectors including finance, manufacturing, and energy, helping organizations navigate evolving regulatory landscapes and embed sustainability into their core operations. Adam holds a Master of Business Administration and has over a decade of experience in consulting, with the past six years dedicated to advancing corporate sustainability and ESG integration.
In addition to serving on the Board of Directors for CEP Calgary, Adam is actively involved in national standards development through the CSA Group and contributes to sustainability-focused professional networks across Canada. He is passionate about mentorship, collaboration, and strengthening the sustainability community through knowledge sharing and connection. He is also a guest lecturer at Haskayne School of Business, teaching strategies in corporate sustainability.
Outside of work, Adam enjoys camping, outdoor adventures with his family, and tinkering with his 1982 VW Vanagon Westfalia. He’s always keen to talk climate risk, corporate strategy – or the best snacks for your next camping trip!
Stephen Melle | Director
Stephen is a Senior Analyst in the Sustainability Group at ATCO, where he focuses on sustainability reporting and climate-related risks. With over 12 years of experience in the oil and gas and utility sectors, he has held diverse roles spanning project management and engineering design for crude oil, natural gas, and hydrogen infrastructure projects. He holds a Bachelor of Science in Mechanical Engineering from the University of Saskatchewan and an MBA from the University of Calgary, specializing in Global Energy Management and Sustainability.
Stephen is an enthusiastic contributor to both social and technical committees and is passionate about mentorship. He finds great fulfillment in supporting the personal and professional development of others and is excited to contribute to CEP’s mission of fostering connections and empowering motivated professionals.
Outside of work, Stephen is an avid reader and a dedicated sports fan. A passionate golfer, he spends his free time on the course or in his garage refining his handcrafted golf club prototypes.