Customer Case Story: Hathaway Dinwiddie
Industry: Construction
Focus Area: Automating Construction Carbon Accounting and Streamlining EcoVadis Compliance
The Customer
For over a century, Hathaway Dinwiddie has delivered landmark buildings across major California markets and Seattle. As client demand evolved from LEED certifications to complex embodied carbon metrics and corporate ESG reporting, sustainability shifted from a volunteer effort into a core corporate function.
The Challenge
Facing rising client inquiries and a major contract requiring EcoVadis and SBTi reporting, Hathaway Dinwiddie’s "department of one" hit a critical operational bottleneck. Manually sorting through tens of thousands of fleet and fuel entries, unit conversions, and changing emission factors in spreadsheets consumed days of work each cycle.
The Solution
Hathaway Dinwiddie partnered with Sustaira due to its modular architecture, construction-tailored use cases, and status as a preferred Contractor’s Commitment partner. Sustaira’s engineering team provided hands-on onboarding, translating over 300 dense EcoVadis assessment questions into an automated template that enabled instant document tagging within EcoVadis’s upload limits. Implementation was swift, going live within four to six weeks.
Unlike rigid platforms, Sustaira easily adapts to dynamic construction lifecycles, enabling accurate tracking across temporary, rotating job sites.
“As a sustainability department of one, processing tens of thousands of lines of fleet and fuel data manually used to take days. Moving to Sustaira automated our unit conversions and emission factors, turning a labor-intensive tracking process into a streamlined, efficient workflow.”
— Jessie Buckmaster, Sustainability Manager, Hathaway Dinwiddie
The Results
Sustaira now serves as Hathaway Dinwiddie’s centralized, immutable historical database, streamlining workflows and safeguarding data integrity. Looking ahead, the firm is leveraging Sustaira to navigate California Senate Bill requirements and earn LEED v5 A5 construction carbon credits for clients.
"Sustaira went from contract signing to active data entry in just four to six weeks. Their team seamlessly translated over 300 of our EcoVadis reporting questions into a custom template, allowing us to easily organize and tag backup documentation while building a reliable historical carbon baseline."
— Jessie Buckmaster, Sustainability Manager, Hathaway Dinwiddie
