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Environmental Assistants LLC logoEnvironmental AssistantsHonolulu, Hawaii

Team

Senior leadership, deep Pacific experience

Environmental Assistants is led by professionals with decades of direct environmental program, project, and field experience.

Helene Takemoto

President / Senior Environmental Program and Project Manager

40+ years experience

Helene leads Environmental Assistants with more than 40 years of environmental program and project experience across federal, state, Pacific Island, and commercial work. Her background spans environmental policy, law, and permitting; EIS/EA and environmental documentation; water and wastewater; hazardous waste and remediation; cultural resources; and community engagement. She has helped build and manage major environmental programs, served as a senior environmental liaison on South Pacific regional and Pacific Island standards work, and led environmental response in emergency settings.

  • Environmental policy, law & permitting
  • EIS/EA & environmental documentation
  • Water/wastewater & remediation
  • Cultural resources & community engagement
  • Federal program & emergency response

Derek Yasaka

Senior Environmental Scientist / Remediation and Field Safety Specialist

35+ years experience

Derek brings extensive Pacific experience in remediation and field operations — RI/FS, contamination characterization, hazardous-waste and munitions-response support, and work within CERCLA / CLEAN frameworks. He serves as a Site Safety and Health Officer, leads field-safety on environmental projects, and supports public meetings and community relations, pairing technical rigor with safe field execution.

  • Remedial investigation & feasibility study (RI/FS)
  • Contamination characterization
  • Hazardous waste & munitions response support
  • CERCLA / CLEAN frameworks
  • Site Safety and Health Officer (SSHO)

Brandon Benson

Program Coordinator / Operations and Documentation Support

Program operations experience

Brandon supports Environmental Assistants with program coordination, document control, and operations — including EPA grant support, digital operations, remote team coordination, workflow and documentation support, and client communication, keeping projects organized, responsive, and well-documented.

  • Program coordination
  • Document control
  • EPA grant support
  • Digital operations & remote coordination
  • Client communication

Depth on demand

Senior SME Network

Environmental Assistants maintains access to a Hawaii-based network of senior and principal-level environmental professionals with decades of Pacific experience in environmental policy, regulatory coordination, cultural resources, remediation, water/wastewater, hazardous waste, natural resources, and federal environmental program execution. This network lets the firm match the right senior expertise to each project's needs. Individuals are named only with their permission.

Let's talk about your environmental project

Documentation, compliance, remediation, field investigations, GIS, or stakeholder engagement — tell us what you need and we'll respond promptly.

Request Capability StatementContact Us

helene@environmental-assistants.com