Steven V. Greso President

Steven was hired by Group Four Engineers/Surveyors in 1978. With great mentors, Steven worked on some of the most spectacular projects in the Puget Sound region. These beautiful lots and acreage all needed on-site sewage disposal systems.

In 1986, Steven left Group Four on very good terms to start SV Greso Inc. We have 25 years experience as septic designers, installers, as well as system monitoring and pumping.

When not working on a septic tank task, Steven is a local musician playing French Horn with local groups at various venues around Puget Sound. Daughter Selina is a Juilliard graduate.

Steven is a 25 year member of Master Builder Assoc. NW representative and former Secretary of WOSSA Washington On-Site Sewage Assoc. Current member of SIC Snohomish Health Septic Issues Committee.

SV Greso Inc. has participated at Built Green Shows at the WA State Convention Center. We provide free seminars on septic systems to Real Estate office staff.

A client list would include: real estate agents, builders, developers, attorneys, land use consultants, commercial buildings, municiple agencies, architects, enviromental groups, surveyors, engineers, homeowners and custom home builders.

SV Greso Inc designs septic systems/on-site sewage systems statewide including the new Canyon River Ranch/Reds Fly Shop, Yakima River Ellensburg.

We provide pumping and full septic system monitoring with next day service.

We limit client base to be available at all times to our customers 24/7.


Chris Greso

Chris has 18 years with SV Greso Inc.

Certifications:  Master Installer - King County; On-site Maintainer - King County; Installer, pumper - Snohomish County; State Licensed On-site Sewage System Designer;  Glendon Biofilter certified and King County Rep.

Chris holds a BS degree from SPU and BA degree from EWU. Chris is also active as a high level gymnastics judge.