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The G4 Team
Meet the G4 Team. We strive to bring you excellent service in everything we do.


Dorie Gayner Founder / Chief Administrative Officer Dorie is the Founder of G4 Environmental, LLC (G4), which is a tenant of the Sierra Valley Enterprises, LLC (SVE) business campus at the Biomass Cogen facility in Loyalton, CA. Dorie is working with the management team at SVE on Business Development. G4 will work on fiber procurement for the Cogen facility. Dorie attended Albion College, Michigan State University, and UOPX. Dorie holds a Bachelor of Education (B.Ed.) and a Master’s Degree in Administration. Before founding G4, Dorie founded and managed Pemberton Pine, LLC, where she focused her efforts on restoring a private ranch that burned in Colorado’s Hayman Fire. Dorie’s forestry career began on that ranch in 2003, where she gained extensive experience in developing forestry management plans, working with, the Colorado State Forest Service, 501c3 organizations, managing field employees, and building a successful forestry management company. Dorie's professional certifications include the following: FEMA ICS100 – Introduction to the Incident Command System FEMA ICS-200 - Single Resources and Initial Action Incident Certificate FEMA IS-700 - National Incidence Management System (NIMS) – An Introduction FEMA IS-800 - National Response Framework, An Introduction FEMA IS-0063a - Introduction to Debris Management OSHA 30 - Construction Safety and Health Training OSHA 40 - HAZWOPER Electrical Hazard Awareness Program (EHA

Mark Herndon Partner / Forestry Supervisor Mark has 25 years of forestry experience, including WUI defensible space, handwork, mechanical forest fuels reduction, timber harvesting, road and trail construction, mastication, wildland firefighting, post-fire rehabilitation, and helicopter logging. Mark is a National Wildfire Coordinating Group (NWCG) Certified Firefighter and Fireline Sawyer; Mark's forestry experience includes supervising crews and quality control on thousands of acres of Stewardship contracting work for the Forest Service, roadside forestry work for the Oregon Department of Transportation (ODOT), California Department of Transportation (Caltrans), and Hazard tree removal work for CalRecycle and the California Governor's Office of Emergency Services (Cal OES). Education/Certifications/Professional Affiliations Eastern Arizona College-Thatcher, AZ 1999, Small Business Management certificate course. NWCG S-130/190 FFT1, NWCG S-212 FAL2, NWCG L-180, NWCG S-131, NWCG S-290, NWCG L-280, OSHA 30-Hour Safety, OSHA 40-Hour HAZWOPER, Electrical Hazard Awareness Program (EHAP)

Patrick Gayner Founder / Chief Operations Officer Pat is a National Wildfire Coordinating Group (NWCG) certified Firefighter, Fireline Sawyer, and a Nationally Registered EMT (NREMT) and Wilderness EMT (WEMT) who has worked in post-fire rehabilitation and forest management across the Southwest since 2003. Pat specializes in Business Development, Contract Acquisition, Contract Administration, Safety, Stewardship Contracting, and Quality Control. Pat is a former Board Member of the Intermountain Forest Association (IFA) and former member of the Executive Committee of the Front Range Roundtable (FRRT) in Colorado. Pat's passion is promoting industry rehabilitation and increasing the pace and scale of forest restoration in the USA. Pat's professional certifications include the following: NWCG S-130/190 Wildland Firefighter Type-1 NWCG S-212 Wildland Faller Class-2 NWCG L-180 Human Factors in Wildland Fire NWCG S-131 Advanced Firefighter NWCG FFT1 / Incident Commander Type 5 - ICT5 NREMT - Nationally Registered Emergency Medical Technician - Registry #: E323255 Colorado WEMT-IV Certified #053039 – Wilderness EMT, Intravenous Therapy Approved Wilderness First Aid Certified by Katabatic Mountain School FEMA ICS-100 - Introduction to the Incident Command System FEMA ICS-200 - Single Resources and Initial Action Incident Certificate FEMA IS-700b - National Incidence Management System (NIMS) – An Introduction FEMA IS-800d - National Response Framework, An Introduction Member National Fire Protection Association (NFPA) NFPA Home Ignition Zone (HIZ) CEA Former Fire Mitigation Technician for Florissant Fire Rescue City Forester Licensee Colorado Springs # 72308 City of Grand Junction Licensed Tree Technician – Type B Licensed Timber Operator Class A State of California A012213 Colorado Timber Industry Association (CTIA) Master Logger OSHA 30 - Construction Safety and Health Training OSHA 40 - HAZWOPER Electrical Hazard Awareness Program (EHAP)

Nick Nunley Partner / Senior Forestry Consultant Nick has a wealth of experience and expertise in forestry field operations, construction, project management, and building and scaling forestry management companies. Since starting in the Forestry Construction field in 2004, Mr. Nunley has worked on various projects, primarily focusing on fast-track government forestry construction, US Forest Service - forest fuels reduction, and US Army Corps of Engineers environmental construction projects, working from challenging, high altitude mountainous terrain to lowland projects. Mr. Nunley is a seasoned Estimator, helping identify and establish pricing for proposals and projects. Mr. Nunley works directly with project owners and stakeholders, including landowners and agency representatives. His supervisory role allows him to work with municipal, state, and federal agencies in completing projects, ranging from building site work to power line and pipeline systems. Nick's professional certifications include the following: OSHA 40 - HAZWOPER 8 hr OSHA Refresher training Competent Person Trenching and Excavation Power Safe Veriforce ISNetworld U.S. Army Corps of Engineers Quality Construction Management Training Course Confined Space Entry Emergency First Aid/CPR BLM Standards for Survival

Gretchen Gayner Director of Brand Gretchen's Experience spans the world of Emergency Medical Service, to the Service Industry, to Media and Business. In pursuit of her passion for a sustainable circular economy, Gretchen joined the G4 team because of the company's environmental focus. Gretchen is a key employee who manages company administration and social media. Gretchen is the driving force in the company's branding, she led every step, from the logo creation to the website design and maintenance. In 2009 Gretchen earned the distinction of becoming the youngest certified First Responder in Colorado. She is a former Nationally Registered EMT (NREMT) and volunteer for Mountain Communities Volunteer Fire Department (MCVFD). Gretchen is a certified professional organizer, fluent in Spanish, an accomplished artist, and she has a certificate in Marketing and a certificate in Visual Display and Presentation from Orange Coast College. Gretchen's professional certifications include the following: NAPO OD101 - Fundamental Organizing and Productivity Principles NAPO OD102 - Fundamental Organizing and Productivity Skills NAPO OD103 - Ethics for Professional Organizer and Productivity Specialists FEMA ICS 100 - Introduction to the Incident Command System OSHA 30 - Construction Safety and Health Training