Our Team

    David Jaber – Principal and Founder

David is a business consultant and advisor of 20 years, a Project Drawdown Fellow, and the author of Climate Positive Business: How You and Your Company Hit Bold Climate Goals and Go Net Zero. He has worked with over 150 companies on environmental excellence.

Typical projects involve:
> climate strategy, carbon footprint analytics and GHG reduction for forward-thinking food processing, manufacturing, and tech companies;
> site audits to identify major impacts, quantify the benefits of action, and detail your key improvement opportunities;
> life-cycle analysis (LCA) oriented investigations of business supply-chains.

Clients have included Clif Bar, PG&E, Sustainable Restaurant Group, Delta Dental, Steelcase, Danone, HP, BASF, Bon Appetit Management Company, Equal Exchange, Filson, Ortega Parks, Nutiva, Bare Snacks, Auberge Resorts, Ecocity Builders, Natural Capitalism Solutions and Thunder Valley Community Development Corporation. David’s progress metrics to date include 14,000 tons material diverted from landfill; 28,000+ MTCO2E sequestered, eliminated or avoided; and $31.5M raised for community resilience projects.

David holds an M.S. in Environmental Engineering from University of California at Berkeley and a B.S. in Chemical Engineering from Rice University.

  Bridget Keeler – Climate Consultant

Bridget is an energy industry professional and is passionate about the intersection of sustainability and business. She recently left the clean tech startup Redaptive where she worked in various roles, overseeing the utility incentive program, advancing customer adoption of Commercial Property Assessed Clean Energy, and designing decarbonization products for Redaptive’s customers. Prior to Redaptive, Bridget worked at the Presidio Trust, overseeing the governmental agency’s internal sustainability initiatives.

Bridget holds a B.A. in Economics from Wake Forest University, and is attending graduate school at Columbia University to advance her education in sustainability.

  Natasa Mrazovic – Climate Consultant

Natasa serves as a postdoctoral scholar in the Civil and Environmental Engineering (CEE) Department at Stanford University, working on projects with industry at the Center for Integrated Facility Engineering (CIFE). She was also an affiliate in the Simulation Research Group in the Environmental Energy Technologies Division at Lawrence Berkeley National Laboratory (LBNL) and a Visiting Doctoral Researcher at the 3D Printing Research Group for University of Nottingham in the UK. She previously conducted whole building energy performance simulation research for three years at LBNL, and also served as a Senior R&D Project Manager at Permasteelisa Group, a global leader in building envelope design, manufacturing and installation.

Natasa holds a Ph.D. in Civil and Environmental Engineering from Stanford University, focused on sustainable design and construction, and two Masters degrees in civil engineering and architecture from the University of Zagreb.

  Emeka Ukaga – Climate Consultant

Emeka supports climate project management and execution. He is an Architectural Designer (Associate, AIA) and Civil Engineer (EIT) with a strong background in sustainable design, project management, and global studies. He has spent the last nine years working in the AEC and tech industries working to provide data-driven innovative solutions to sustainability and social impact causes as well as developing a skill set as an architect and structural engineer.

Emeka holds a B.S. in Civil Engineering and a B.A. in Architecture from the University of Pittsburgh as well as a MSE in Sustainable Engineering from Arizona State University.


  Kwame Agyemang – LCA Specialist

Kwame specializes in life cycle assessment (LCA) for Climate Positive, using LCA as a tool to improve the environmental performance of businesses and their supply chain. He has experience in supply chain management, business management, logistics and agricultural engineering. Earlier in his career, Kwame worked in water and sanitation systems.

Kwame B. Agyemang is a recent graduate from Linköping University with a Master’s degree in Environmental Science, with specialization in Sustainability Science and holds a Master of Science, Logistics, Materials, and Supply Chain Management from Kwame Nkrumah’ University of Science and Technology.

   Tiersha Lin – Marketing Specialist

Tiersha serves as Climate Positive’s lead on digital marketing. In her marketing work, she has participated in collegiate case competitions and the Google Ads Online Marketing Challenge, and she is expanding her breadth of marketing knowledge and experiences with other projects, internships, and freelance work. Tiersha is also passionate about social justice, sustainability and cultural activism, holding leadership positions in cultural organizations and non-profits dedicated to these causes.

Tiersha is a student at the University of California, Santa Barbara pursuing a double major in Economics and Accounting (B.A.) and Dance (B.F.A.), while exploring career paths in marketing and consulting.

  Miu Tam – Accountant

Miu leads our bookkeeping and accounting services. As the founder of Cloud n’ Books, Miu excels in leveraging web-based software and apps to streamline the accounting process and better organize complex accounting data and documents. In addition to managing a business herself, she has provided accounting support to restaurants, beauty salons, consultants, real estate brokers, retail stores, trading companies, and non-profit organizations