Consulting engineering firm specializing in geotechnical engineering and geological sciences; Environmental and hazardous waste services; Construction Materials Testing and Environmetal Services.

Brownfield, UST & LUST, Phase I & II ESA, Remediation, Asbestos Inspections, Lead Based Paint Surveys, NEPA, EA, EIS, Compliance, Wetland, Sustainability, Grant writing, NPDES & SPCC permits, IAQ, Project Management, Plans & Specs, Industrial Hygiene

Koester Construction Company, Inc. is a Des Moines based general contractor with over 30 years of experience in all commercial project types, with specializations in multi-family, restaurant and historical work. Our commitment to hiring and developing a dedicated, capable and friendly team allows us to make the construction process successful and enjoyable from project development to completion.

Earthwork, Excavation, Trucking, Soil Extraction, Hardscapes, Retaining Walls, and Pavers.

Specialty contractor that waterproofs basements, repairs foundations, raises and levels concrete slabs, performs radon mitigation, install egress windows, installs and cleans gutters and provides gutter protection.

Painting, wall covering, resinous flooring, tank lining, sandblasting

We specialize in flat roofing, and in between the stud insulation using spray foam urethane. Spray foam insulation completely seals any air leaks, eliminates mold, reduces size of heating/air conditioning unit needed vs fiberglass insulation.

DEMOLITION

Install Storm, Sewer and Water Mains. Demolition, Excavation.

General Construction Building Contractor. New construction and renovations. Rough and finish carpentry.

Historical Restoration & Preservation, Masonry work, Tuck pointing, Chimney sweeping/inspection & repair, Custom vinear - cultures stone, Foundation repair & maintenance, Concrete work, Fireplace, Sealing of exterior masonry structure, Sandblasting

INSTALLATION, REPAIR, GARAGE DOORS, OPERATORS, ROLLING STEEL, GRILLES, GATES

We have three distinct business lines. 1. Thinix- We build guest access computer technology. 2. L7Support.com- networking support service. 3. AudioEngineering.com- Full service accoustical engineering and A/V contracting firm.

Capabilities include demolition of small to large structures, including bridges and parking garages. Interior demolition and excavation experience

EXCAVATING, LOADING TRUCKS, HAULING

Electrical Panel design and engineering, Component cost reduction program, Expeditious delivery time, UL 508A/698A standard panel certification, custom built to government specifications, retrofitting, mechanical, pneumatic, and hydraulic control assembly

Covering interior and exterior walls, ceilings and floors for residential, commercial and industrial painting and staining applications.

Seamless gutters installation - historical, residential & commercial. Siding and windows. Roofing

Constructtion of new single family homes and multiple family homes

Bridge building, dewatering, cofferdam, drive sheeting, place riprap, bridge approaches.