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Thaddeus Ruiz-Whitcombe

ISA Certified Arborist & Climbing Crew Lead
Portland, OR, United States

Professional Summary

ISA Certified Arborist and Tree Risk Assessment Qualified (TRAQ) climber with 9 years in commercial and municipal tree care across the Willamette Valley and Portland metro. Leads 4-person climbing and rigging crews through complex removals, crane-assisted work over structures, and precision pruning to ANSI A300 standards. Maintains zero lost-time incidents over the past 5 years through disciplined ANSI Z133 safety practice and daily tailgate briefings. Experienced in utility line clearance near energized distribution lines and rapid storm-response callouts.

Employment History

Climbing Crew Lead
Cascade Canopy Tree Care · Portland, OR
Apr, 2021
Lead a 4-person climbing and rigging crew completing removals and pruning on 1,100+ residential, commercial, and municipal trees per year. Write rigging plans for crane-assisted removals over homes, power drops, and occupied structures, with zero property-damage claims since 2021. Trained and mentored 6 climbers in SRT/MRT systems, aerial rescue, and friction-device rigging; 4 promoted to lead climber. Run daily ANSI Z133 tailgate safety briefings and job hazard analyses, sustaining zero lost-time incidents across the crew for 5 consecutive years. Cut storm-callout response time to under 2 hours and manage a crew book generating $480K in annual revenue through accurate client estimates.
Arborist / Climber
Willamette Urban Forestry Contractors · Salem, OR
Jun, 2018 · Mar, 2021
Climbed and pruned trees on a 3,200-tree municipal street-tree maintenance contract for the City of Salem, finishing each annual cycle on schedule. Performed structural and clearance pruning per ANSI A300 standards on young and mature street trees, reducing sidewalk and sign-conflict complaints by 35%. Installed 60+ dynamic and static cabling and bracing systems on high-value heritage oaks and maples to reduce failure risk. Delivered plant health care treatments including trunk injections for 400+ ash and elm trees under emerald ash borer and Dutch elm disease programs. Updated GIS tree inventory records (species, DBH, condition, work history) for 2,500+ trees using tablet-based field collection.
Ground Worker → Line Clearance Trainee
Pacific Line Clearance Services · Eugene, OR
May, 2016 · May, 2018
Operated 12-inch chippers and stump grinders safely on 500+ job sites, maintaining a clean equipment incident record. Set up MUTCD-compliant traffic control and work zones on arterial roads for utility crews of 3–6 workers. Promoted to line clearance trainee in 2017; trimmed vegetation near energized distribution lines under direct qualified line-clearance arborist supervision. Completed daily pre-trip inspections on bucket trucks, chippers, and trailers, flagging defects that prevented 10+ potential breakdowns.

Education

Associate of Applied Science, Arboriculture & Urban Forestry
Clackamas Community College · Oregon City, OR
Sep, 2014 · Jun, 2016
Coursework in tree biology, dendrology, urban forest management, arboriculture climbing techniques, and pest management.

Skills

Aerial rescue
SRT/MRT climbing
Rigging & friction devices
Crane-assisted removal
Tree Risk Assessment (TRAQ)
Pruning per ANSI A300
ANSI Z133 safety
Chainsaw maintenance
Bucket truck operation
Stump grinding
Plant health care
Crew leadership
Client estimates

Courses

ISA Certified Arborist (PN-8842A)
International Society of Arboriculture
Mar, 2019
ISA Tree Risk Assessment Qualified (TRAQ)
International Society of Arboriculture
Oct, 2022
EHAP Electrical Hazards Awareness Program
Tree Care Industry Association
Feb, 2023
First Aid/CPR
American Red Cross
Jan, 2025
Oregon Pesticide Applicator License
Oregon Department of Agriculture
Apr, 2020
CDL Class B
Oregon DMV
Aug, 2018