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Greene Information SystemsCybersecurity company in Seattle, WA

Greene Information Systems is a cybersecurity company at 4138 California Ave SW Ste A, Seattle, WA 98116, ranked #16 of 125 cybersecurity companies in Seattle and rated 5.0 from 9 Google reviews. Open Monday to Friday.

Facts here come from public sources and the firm itself. Confirm certifications, insurance and contract terms with the firm before you sign.

Seattle, WAUpdated 0 paid placements in any rankingHow we rank

Call (206) 639-2900Website ↗

Key facts

Key facts about Greene Information Systems
Address4138 California Ave SW Ste A, Seattle, WA 98116Get directions
Phone(206) 639-2900
Websitegreeneis.com
HoursMonday to Friday: 8 AM – 5 PM
Google rating5.0 from 9 Google reviews

Services

Each service shows the evidence we matched it on.

  • Cybersecuritymain serviceGoogle main category
  • Managed IT Servicesadditional Google category
  • IT Consultingadditional Google category
  • Network Cablingadditional Google category

Service area

Serves Seattle and 11 towns within 75 miles: White Center, Burien, Bainbridge Island, Mercer Island, Bryn Mawr-Skyway, Tukwila, Vashon, Bellevue, SeaTac, Renton and Newcastle.

Based in Seattle, WAView on map

Opening hours

Opening hours for Greene Information Systems
DayHours
Monday8 AM – 5 PM
Tuesday8 AM – 5 PM
Wednesday8 AM – 5 PM
Thursday8 AM – 5 PM
Friday8 AM – 5 PM
SaturdayClosed
SundayClosed
  • Open evenings — no
  • Open Saturdays — no
  • Open Sundays — no

Questions about Greene Information Systems

How is Greene Information Systems ranked in Seattle?

Greene Information Systems is ranked #16 of 125 cybersecurity companies in Seattle by IFR Score, with 56 out of 100 as of November 2026. The score weighs reputation, review volume, recency, availability, service focus, proximity, claimed profile, partnered and client reviews. No business can pay to change its rank.

What are Greene Information Systems’ hours?

Greene Information Systems is open Monday to Friday. Its listed hours are Monday to Friday, 8 AM – 5 PM. It is closed on Saturdays and closed on Sundays. Hours come from the business listing; holiday hours may differ.

What areas does Greene Information Systems serve?

Serves Seattle and 11 towns within 75 miles: White Center, Burien, Bainbridge Island, Mercer Island, Bryn Mawr-Skyway, Tukwila, Vashon, Bellevue, SeaTac, Renton and Newcastle. The list is based on the business's location and the usual service radius for cybersecurity. Confirm your address is covered when you call.

What do Google reviews say about Greene Information Systems?

Greene Information Systems has a rating of 5.0 from 9 Google reviews. The IFR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

How do I contact Greene Information Systems?

Call Greene Information Systems on (206) 639-2900. The business is at 4138 California Ave SW Ste A, Seattle, WA 98116. Its website is linked in the key facts on this page. Ask for a written scope and quote before any work starts.

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Compare nearby cybersecurity companies

Greene Information Systems compared with nearby businesses
BusinessRankIFR ScoreGoogle ratingSaturdaySundayDistance away
Greene Information Systems (this business)—565.0 (9)NoNo
Attentus Technologies - Seattle Managed IT Services Company#14575.0 (43)YesYes5.2 mi
Elliptic Systems Corporation#15565.0 (17)NoNo25.2 mi
A+ Computer Rescue#17564.9 (105)YesYes15.6 mi

See all 125 ranked cybersecurity companies in Seattle