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Gwendolen Hartwell-Okorie

Refractory Bricklayer
Sioux Falls, SD, United States

Professional Summary

Journeyman refractory bricklayer with 8+ years installing and repairing high-temperature linings in industrial furnaces, kilns, and boilers across the Upper Midwest. Skilled in firebrick, castable, ceramic fiber, and gunite systems; known for precise layout, safe demolition of spent linings, and meeting outage windows without rework.

Employment History

Senior Refractory Bricklayer
Prairie Industrial Refractories · Sioux Falls, SD
Mar, 2021 · Present
Lead lining crews of 4–8 on planned outages for cement kilns, heat-treat furnaces, and package boilers across SD, MN, and IA. Install firebrick, insulating brick, plastic refractory, and ceramic fiber modules to OEM and engineer drawings within ±1/8 in tolerances. Tear out spent linings with pneumatic tools and needle guns while protecting adjacent equipment and maintaining confined-space protocols. Mix and place castable and gunite refractory; oversee curing schedules and post-install heat-up coordination with plant operations. Cut material waste ~12% by nesting brick cuts and reclaiming reusable shapes; zero recordable injuries on crews led since 2022.
Refractory Bricklayer
Midcontinent Furnace Services · Sioux Falls, SD
Jun, 2017 · Feb, 2021
Built and repaired refractory linings for foundry furnaces, aluminum melt shops, and food-plant boilers. Anchored ceramic fiber and IFB systems; set expansion joints and expansion paper per manufacturer specs. Supported emergency hot-patch and cold-repair callouts with typical on-site response under 4 hours for regional plants. Mentored two apprentices on brick bonding patterns, mortar consistency, and safe scaffold/work-platform use. Completed OSHA 30 and company confined-space/rescue training; served as temporary crew lead on overnight outages.
Apprentice Mason / Refractory Helper
Dakotas Masonry & Heat · Sioux Falls, SD
Aug, 2014 · May, 2017
Assisted journeymen with material staging, mortar mixing, and demolition of spent furnace linings. Learned firebrick cutting with wet saws and hammers; practiced running bond, herringbone, and arch work on practice walls. Maintained tool cribs, PPE, and jobsite housekeeping to jobsite audit standards. Completed ABC refractory apprenticeship coursework and on-the-job hours toward journeyman status.

Education

Refractory Specialist Certificate
Southeast Technical College · Sioux Falls, SD
May, 2016
High School Diploma
Roosevelt High School · Sioux Falls, SD
May, 2014

Skills

Firebrick installation
Ceramic fiber modules
Furnace & kiln lining
Boiler refractory repair
Outage planning
Crew leadership
Material takeoff
Castable & gunite refractory
Blueprint & isometric reading
Confined-space work
Wet saw & pneumatic tools
Expansion joint layout

Courses

Journeyman Refractory Bricklayer
ABC / Local Apprenticeship
OSHA 30 Construction
OSHA
Confined Space Entry & Attendant
Scaffold User / Erector Awareness
First Aid / CPR