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Company · Water treatment services general

Garratt Callahan

As of 5 November 2026, Garratt Callahan has 30 open roles (14 new in 30 days), its skilled trades and field service team is hiring most, and its postings name Google Ads, IBM i and Microsoft Advertising as the tools the team works in.

As of 5 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.

Burlingame, United States201-500 employees50M-250M revenue, est.B2Bgarrattcallahan.com ↗LinkedIn ↗
Headquarters
Burlingame, California, United States
Employees
201-500 employees (linkedin)
Sells to
commercial properties, data centers, food and beverage
Certifications on site
ISO 9001
Site languages
EN
Career system
Adp
30open roles · 14 new in 30 days
14tools named in postings
United Stateshiring locations
0change signals read in postings
02What they do, whom they sell to, who else does it

Garratt Callahan in one screen

Read from garrattcallahan.com: what the company does, the customers it names, the buyers we can actually see, and the companies that sell the same thing.

What Garratt Callahan does

Garratt Callahan is a water treatment service provider that treats boiler, cooling, and wastewater for commercial, industrial, and government clients. Its offerings include reverse osmosis, water safety programs, ELAP laboratory testing, and onsite training. It serves industries such as data centers, food and beverage, healthcare, hospitality, and manufacturing.

boiler water treatmentcooling water treatmentwastewater treatmentreverse osmosiswater safety programsELAP laboratory testingonsite training
Whom it sells to

Named on the site: commercial properties, data centers, food and beverage, government, healthcare, hospitality, manufacturing.

Who else sells this

Nearest companies by what they do, sell and whom they serve, 51+ employees. 563 scored.

ChemTreatUnited States · 1001-5000 employeesvstratamentodeagua.com.brBrazil · 51-200 employeesWaterProfessionalsUnited States · 51-200 employeesGlobal WatechFrance · 51-200 employeesSylmar GroupUnited States · 51-200 employeesCulliganUnited States · 10,001+ employees
03Tech stack, with the evidence

What Garratt Callahan says it runs

Tools named in the company's own postings as the team's systems, with the sentence that says so. What the website and DNS show is listed separately.

Google AdsMarketing & communications · high confidence · 1 posting
n of the Marketing Manager, implement, manage, and optimize digital marketing campaigns across multiple platforms (Google Ads, Bing Ads, Facebook, LinkedIn) both internal (internal announcements) and external (including recruiting efforts).
Assistant Marketing Manager · first seen 2026-10-24
IBM iMarketing & communications · high confidence · 1 posting
• Maintain CRM and internal ROI tracking databases (AS400, Excel) and build custom reports as needed.
Assistant Marketing Manager · first seen 2026-10-24
Microsoft AdvertisingMarketing & communications · high confidence · 1 posting
n of the Marketing Manager, implement, manage, and optimize digital marketing campaigns across multiple platforms (Google Ads, Bing Ads, Facebook, LinkedIn) both internal (internal announcements) and external (including recruiting efforts).
Assistant Marketing Manager · first seen 2026-10-24
WordPressMarketing & communications · high confidence · 1 posting
• Under the guidance of the Marketing Manager, coordinate and update the company website (WordPress) and social media channels.
Assistant Marketing Manager · first seen 2026-10-24
Microsoft ExcelMarketing & communications · medium confidence · 4 postings
• Maintain CRM and internal ROI tracking databases (AS400, Excel) and build custom reports as needed.
Assistant Marketing Manager · first seen 2026-10-13
Microsoft OfficeMarketing & communications · medium confidence · 4 postings
Working knowledge of Microsoft Office tools, such as Word, Excel and PowerPoint is required the Google Docs suite of productivity tools as well.
Water Treatment Construction Coordinator for Data Centers · first seen 2026-10-13
Microsoft PowerPointMarketing & communications · medium confidence · 4 postings
Working knowledge of Microsoft Office tools, such as Word, Excel and PowerPoint is required the Google Docs suite of productivity tools as well.
Water Treatment Construction Coordinator for Data Centers · first seen 2026-10-13
Microsoft WordMarketing & communications · medium confidence · 4 postings
Working knowledge of Microsoft Office tools, such as Word, Excel and PowerPoint is required the Google Docs suite of productivity tools as well.
Water Treatment Construction Coordinator for Data Centers · first seen 2026-10-13
Google Docsmedium confidence · 3 postings
Working knowledge of Microsoft Office tools, such as Word, Excel and PowerPoint is required the Google Docs suite of productivity tools as well.
Water Treatment Construction Coordinator for Data Centers · first seen 2026-10-13
FacebookMarketing & communications · medium confidence · 1 posting
n of the Marketing Manager, implement, manage, and optimize digital marketing campaigns across multiple platforms (Google Ads, Bing Ads, Facebook, LinkedIn) both internal (internal announcements) and external (including recruiting efforts).
Assistant Marketing Manager · first seen 2026-10-24
HubSpotMarketing & communications · medium confidence · 1 posting
• Working knowledge of CRM systems (Hubspot, SalesForce, other) and/or database management.
Assistant Marketing Manager · first seen 2026-10-24
LinkedInMarketing & communications · medium confidence · 1 posting
n of the Marketing Manager, implement, manage, and optimize digital marketing campaigns across multiple platforms (Google Ads, Bing Ads, Facebook, LinkedIn) both internal (internal announcements) and external (including recruiting efforts).
Assistant Marketing Manager · first seen 2026-10-24
MailchimpMarketing & communications · medium confidence · 1 posting
• Utilize tools such as MailChimp and Survey Monkey for campaign outreach and feedback collection.
Assistant Marketing Manager · first seen 2026-10-24
Microsoft OutlookMarketing & communications · medium confidence · 1 posting
• Proficient in Microsoft Office Suite (Word, Excel, PowerPoint, Outlook) at an intermediate to expert level.
Assistant Marketing Manager · first seen 2026-10-24
On the website or in DNS

Vendors whose code loads on garrattcallahan.com or whose records sit in its DNS. Page plumbing (libraries, fonts, consent banners) is left out.

04Hiring

30 open roles, 26 opened in 90 days

Read hourly from the company's career system. Open roles and new roles in the last 30 days, by team. Companies hiring skilled trades and field service in United States →

05Signals

What is changing, read from the postings

Intents are events the employer states about itself, each with the sentence and the posting it came from.

No change signals read in the current postings.

Decision makers at Garratt Callahan, with verified e-mails, and every change the moment it is posted.

Sales, marketing and IT leaders by function. Add Garratt Callahan to a monitor and get a webhook when a role opens, a tool appears or a signal is read.

Start free, no card. The first 20 are above; e-mails are verified at the mail server when you open them.

06Lookalikes

Companies like Garratt Callahan

Nearest by what they do, what they sell and whom they sell to, 51+ employees. 6 of 563 scored.

ChemTreatWater treatment services general · United States1001-5000 employees
vstratamentodeagua.com.brWater treatment services general · Brazil51-200 employees
WaterProfessionalsWater treatment services general · United States51-200 employees
Global WatechWater treatment services general · France51-200 employees
Sylmar GroupWater treatment services general · United States51-200 employees
CulliganWater treatment services general · United States10,001+ employees
07Profile

From the company's own website

Legal nameGarratt Callahan
IndustryManufacturing & industry · Water treatment services general
Offeringsboiler water treatment · cooling water treatment · wastewater treatment · reverse osmosis · water safety programs · ELAP laboratory testing · onsite training
Target customerscommercial properties · data centers · food and beverage · government · healthcare · hospitality · manufacturing
Geographic scopeunknown · also United Kingdom
Reviews found
Public contact points0 role addresses · 2 phone numbers
Pages readhome
Datescrawled 2026-09-09 · profiled 2026-09-12 · hiring built 2026-11-04
Cite this

Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.

Garratt Callahan (Burlingame, United States, 201-500 employees) has 30 open roles, 14 new in 30 days, and names 14 tools in its postings. (Breaknorm, 5 November 2026, https://breaknorm.co/company/garrattcallahan.com)
How we know

Read from the source, not self-reported

Every number on this page can be traced to a page we crawled or a posting we read. Full methodology →

  • ProfileBuilt from garrattcallahan.com: summary, offerings, customers, certifications and contact points are extracted from its pages, with a confidence score per field.
  • HiringRead hourly from the company's Adp career site; reposts collapse into one record.
  • Tech stackTools the employer's own text names as the team's systems, with the quote; website scripts counted separately.
  • HeadcountLinkedIn where known, otherwise estimated from the site.
FAQ

Garratt Callahan: questions

Does Garratt Callahan use Google Ads?

Yes, by the company's own words: 1 posting name it, first seen 2026-10-24, in the marketing & communications team.

Is Garratt Callahan hiring?

30 open roles as of 5 November 2026, 14 opened in the last 30 days and 0 closed. The largest team hiring is skilled trades and field service.

Where does this profile come from?

From garrattcallahan.com itself: we crawled it on 2026-09-09, built the profile on 2026-09-12, and read its career site (Adp) hourly since. Headcount is from LinkedIn.

Who should I write to at Garratt Callahan?

The people are behind the login: decision makers by function, verified at the mail server when you open them. 0 public role addresses from the site are there too.

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