Insights

Expansion & Partnerships Mountainside's strategic collaborations with hospitals and university medical programs, such as Stony Brook and Southampton Hospital, highlight opportunities to provide allied health training, specialized addiction education, and scalable healthcare solutions for partner institutions.

Recognition & Credibility Being recognized as a Recovery-Friendly Workplace by Connecticut state officials enhances Mountainside's reputation, opening doors for government grants, public funding, and partnerships focused on workforce health and substance abuse recovery initiatives.

Geographic Reach With multiple locations across Connecticut, New York, and New Jersey, and virtual services in Massachusetts, Mountainside presents regional expansion opportunities and digital solutions tailored to diverse markets with growing demand for mental health and addiction services.

Technology Adoption Utilizing modern tech stacks such as AppNexus, Envoy, and Cisco Meraki indicates openness to integrating innovative digital platforms, paving the way for offerings in telehealth, patient management systems, and data-driven treatment analytics.

Funding & Revenue Growth Generating between $25 million and $50 million in revenue, Mountainside's financial stability suggests potential for customized service packages, equipment upgrades, and technology solutions to support expansion and enhance treatment efficacy.

Mountainside Tech Stack

Mountainside uses 8 technology products and services including Microsoft Advertising, AppNexus, cdnjs, and more. Explore Mountainside's tech stack below.

  • Microsoft Advertising
    Advertising
  • AppNexus
    Advertising
  • cdnjs
    Content Delivery Network
  • Slick
    Javascript Libraries
  • OWL Carousel
    Javascript Libraries
  • PWA
    Miscellaneous
  • Priority Hints
    Performance
  • YouTube
    Video Players

Mountainside's Email Address Formats

Mountainside uses at least 1 format(s):
Mountainside Email FormatsExamplePercentage
First.Last@mountainside.comJohn.Doe@mountainside.com
82%
FLast@mountainside.comJDoe@mountainside.com
11%
Last@mountainside.comDoe@mountainside.com
5%
First.Middle@mountainside.comJohn.Michael@mountainside.com
2%

Frequently Asked Questions

Where is Mountainside's headquarters located?

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Mountainside's main headquarters is located at 187 South Canaan Road Canaan, Connecticut 06018 United States. The company has employees across 2 continents, including North AmericaAfrica.

What is Mountainside's phone number?

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You can contact Mountainside's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Mountainside's official website and social media links?

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Mountainside's official website is mountainside.com and has social profiles on LinkedIn.

What is Mountainside's NAICS code?

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Mountainside's NAICS code is 62133 - Offices of Mental Health Practitioners (except Physicians).

How many employees does Mountainside have currently?

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As of June 2026, Mountainside has approximately 292 employees across 2 continents, including North AmericaAfrica. Key team members include Chief Executive Officer: A. B.Chief Executive Officer: B. B.Chief Operating Officer: C. M.. Explore Mountainside's employee directory with LeadIQ.

What industry does Mountainside belong to?

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Mountainside operates in the Mental Health Care industry.

What technology does Mountainside use?

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Mountainside's tech stack includes Microsoft AdvertisingAppNexuscdnjsSlickOWL CarouselPWAPriority HintsYouTube.

What is Mountainside's email format?

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Mountainside's email format typically follows the pattern of First.Last@mountainside.com. Find more Mountainside email formats with LeadIQ.

When was Mountainside founded?

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Mountainside was founded in 1998.

Mountainside

Mental Health CareConnecticut, United States201-500 Employees

At Mountainside Treatment Center, a nationally acclaimed drug addiction treatment and alcohol rehabilitation center, we believe that you can make a difference no matter the position you hold. Each employee plays an important role in caring for clients, giving them a unique and positive experience during their stay. 

Founded in 1998, Mountainside is a leading provider of chemical dependency treatment services. 

We have locations in Connecticut (Canaan and Wilton), New York (Manhattan, Chappaqua and Huntington) and New Jersey (Ramsey). We also serve Massachusetts virtually.

More about our company can be found at http://mtsi.de/treatment. You may also call 888-510-8852 (toll-free).

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CONNECT WITH MOUNTAINSIDE:
 
Facebook: http://www.facebook.com/mountainsidetreatment
Instagram: http://www.instagram.com/mountainsidect
Twitter: http://www.twitter.com/mountainside

Section iconCompany Overview

Headquarters
187 South Canaan Road Canaan, Connecticut 06018 United States
Phone number
NAICS Code
62133 - Offices of Mental Health Practitioners (except Physicians)
Founded
1998
Employees
201-500

Section iconFunding & Financials

  • $25M$50M

    Mountainside's revenue is estimated to be in the range of $25M$50M

Section iconFunding & Financials

  • $25M$50M

    Mountainside's revenue is estimated to be in the range of $25M$50M

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