Irrigation Consulting, Inc. 

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Spectrum Irrigation consulting INC.   


In 1994, Steven L. Sisler and  Dave Powell joined their irrigation design expertise to form Spectrum Irrigation Consulting, Inc . Together they bring 70+ years of providing a wide range of professional commercial irrigation system design services, ranging from small retail projects to complex commercial or large development projects technically demanding or involving environmentally regulated sites. Coordinated work arrangements with other design professionals and owner representatives are an expertise we have developed through our years of experience.

With the industry continually updating technology, new software is available to assist in the design process, Spectrum Irrigation Consulting, Inc. continues to upgrade with software and personnel.  All our designers are experienced operators of all design software, including AutoCAD and Irrigation Design software. 


In providing our client’s with the best services required, Spectrum Irrigation Consulting, Inc. carries Professional Liability Insurance and General Liability Insurance Policies.  Other project specific insurances required can be provided upon request. 







Steven L. Sisler, CID CLIA, ASIC, President 

Spectrum Irrigation Consulting, Inc.                                                                       Jan. 1994-Present 


Steven L. Sisler, Irrigation Consultant 

Irrigation Consulting Firm, Owner                                                                   April 1991 to Jan. 1994 


Vice President-Head of Design 

Bob Oltman and Associates, Inc. - Chandler, Arizona 

Irrigation Consulting Firm                                                                             April 1982 to March 1991 




Imagination Graphics 

AutoCAD Release 12 Training Class.                                                                                  Dec. 1993 


Rain Bird Sales, Inc. Golf Division, Glendora, Ca. 

Maxi System V Computer & Basic Programming Certification, Level 1.                       March 1992 


Pumping Systems Inc., Dallas, Texas 

Design and Application of Pumping Systems                                                                January 1992 


The Irrigation Association, Arlington, Virginia 

Certified Irrigation Designer, Commercial                                                         April 1989 to Present 

Certified Golf Irrigation Auditor                                                                             July 2004 to Present 


Salina Area Vo-Tec, Salina, Kansas 

Honor Graduate, Drafting, two-year course.                                                                          May 1972 


Cloud County Community College, Concordia, Kansas 

Architectural Drafting, major                                                                                                    May 1970 





American Society of Irrigation Consultants 

Professional Member                                                                                                     1984 to Present 

President, Arizona Chapter ASIC                                                                                     1989 to 1992 

President, ASIC Southwest Chapter                                                                                2002 to 2005 

National Board Member                                                                                                     2000 to 2005 

National Executive Board                                                                                              2006 to Present 


Cactus & Pine Golf Course Superintendent Association 

Affiliate Member                                                                                                              1989 to 2009 


Irrigation Association 

Professional Member                                                                                                     2006 to 2009 


United StatesGolf Association 

Member                                                                                                                             1992 to 2009 






David Powell, CID, Vice President 

Spectrum Irrigation Consulting, Inc.                                                                          Jan. 1994-Present 


Irrigation Consulting Firm, Owner                                                                              1978 to Jan. 1994 




Imagination Graphics 

AutoCAD Release 12 Training Class.                                                                                March 1994 


The Irrigation Association, Arlington, Virginia 

Certified Landscape Irrigation Auditor                                                             March 2005 to Present 


Flowtronex/PSI Dallas, Texas 

Big Picture Pump Station School                                                                              January 1995 




American Society of Irrigation Consultants 

Professional Member                                                                                                          1984 to 2010

National ASIC Treasurer                                                                                                     1990 to 1991 

Treasurer, Arizona Chapter ASIC                                                                                      1984 to 1992 

 ASIC Southwest Chapter Executive Board                                                                      2002 to 2011 




  Spectrum eliminates the fax line.
 As new technology advances, old technology is put aside.  Spectrum Irrigation Consulting, Inc. has eliminated our fax number in favor of the new technology, sending images via email. If you have any difficulties with this, please contact us.

 A New Decade brings about big changes to Spectrum I. C.

Please see our Water Management section or contact us for information on how Spectrum I. C. can assist your site in promoting conservation by having a Water Audit performed.  We can assemble a Watering Schedule from the water audit that can be implemented by your Maintenance Personnel or managed by our Third Party Water Manager Program.