JOB DETAILS

Senior Manager, Accounting

CompanyMountainside Treatment Center
LocationCanaan
Work ModeOn Site
PostedApril 18, 2026
About The Company
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). ===== CONNECT WITH MOUNTAINSIDE: Facebook: http://www.facebook.com/mountainsidetreatment Instagram: http://www.instagram.com/mountainsidect Twitter: http://www.twitter.com/mountainside
About the Role

Description

Senior Manager, AccountingCanaan, CT


About the Position:


We are seeking a Senior Manager, Accounting to serve as the organization’s senior accounting leader within a fast-paced, entrepreneurial, mission-driven healthcare environment. This role provides broad exposure across the organization and close partnership with executive leadership while maintaining strong accounting integrity and operational excellence.


The Senior Manager, Accounting is responsible for ensuring the accuracy, completeness, and timeliness of the organization’s financial records and reporting. The role partners closely with executive leadership and contributes to strategic discussion by developing and presenting accounting insights, analyses, and recommendations that support informed decision-making and governance oversight.


The accounting function operates within an evolving environment shaped by the organization’s growth over time. A key focus of this role is to modernize, enhance, and scale accounting processes as needed to support increasing complexity, while ensuring consistency, accuracy, and operational excellence. This position requires hands-on performance and active day-to-day engagement in the accounting operations.


Schedule:


Monday - Friday: 9:00 am - 5:30 pm, with flexibility as required


What You’ll Do:


Accounting Leadership & Oversight

  • Provide leadership across the organization’s accounting function, including general ledger, accounts payable and receivable, payroll coordination, and fixed assets
  • Guide monthly, quarterly, and annual close processes, maintaining high standards for accuracy, timeliness, and completeness
  • Ensure financial statements and related schedules are prepared in accordance with U.S. GAAP

Financial Leadership, Reporting & Strategic Insight

  • Act as a strategic accounting partner to managers and executive leadership, supporting informed decision-making through clear financial reporting and analysis
  • Develop and deliver financial reports, trend analysis, and variance explanations that support executive and Board-level review
  • Translate complex financial and operational activity into clear narratives that enable productive strategic dialogue
  • Collaborate with department leaders on budgeting, forecasting, and performance monitoring, bringing consistency, rigor, and financial perspective to planning efforts
  • Provide analytical insight and recommendations that help leadership assess performance, risks, and opportunities

Compliance, Controls & Audit

  • Uphold compliance with applicable healthcare regulations, including CMS and relevant state and federal requirements
  • Maintain and strengthen internal controls to support consistency, transparency, and risk management.
  • Serve as a primary liaison for internal and external audits, coordinating preparation, responses, and follow-through in partnership with finance leadership and external advisors

Team Leadership

  • Lead, mentor, and develop a high-performing accounting team
  • Foster a culture of accountability, collaboration, and continuous improvement
  • Provide guidance, review deliverables, and support professional growth within the function
  • Hands-on, everyday operation presence and support 

Process Improvement & Systems

  • Continuously evaluate accounting workflows and reporting processes to enhance effectiveness and reliability
  • Support system optimization and thoughtful adoption of tools and best practices as the organization evolves
  • Partner cross-functionally to improve financial data integrity and reporting usefulness across the organization

What We Offer:

  • High visibility and direct partnership with executive leadership
  • Meaningful impact in a mission-driven healthcare organization
  • Stable schedule with consistent hours (no public accounting grind)

Qualifications:

  • Bachelor’s degree in Accounting, Finance, or a related field.
  • 5+ years of progressive accounting experience, including leadership of professional staff
  • Experience in healthcare or similarly regulated environments preferred
  • Demonstrated experience with financial reporting, close management, and forecasting
  • CPA or MBA are a plus, but strong hands-on accounting leadership is equally valued. 
  • Proficiency in accounting software and ERP systems (experience with QuickBooks, Sage Intacct, or similar platforms preferred).
  • Strong understanding of U.S. Generally Accepted Accounting Principles (GAAP).
  • Excellent communication and interpersonal skills, with the ability to collaborate across departments and influence key decision-makers.

Compensation:


The salary range for this position is $115,000 to $130,000 annually, with placement based on experience, scope of responsibility, and demonstrated leadership capability. Actual pay is determined based on a number of job-related factors including skills, education, training, credentials, experience, scope and complexity of role responsibilities, geographic location, performance, and working conditions.


Benefits:

  • Comprehensive benefit package
  • Paid Time Off (which increases after 1 year with Mountainside)
  • Paid holidays including a Multicultural Holiday
  • 401(k) with employer matching
  • Free meals while working on the Canaan campus
  • Monthly $75.00 wellness reimbursement. Our Wellness Reimbursement benefit is meant to encourage employees to engage in productive self-care to avoid burnout and compassion fatigue.

About Mountainside:


Mountainside Treatment Center is a dynamic, fast-paced and growing recovery facility that values innovation and an obsession with providing Best in Class service to our Clients. Founded in 1998, we are a leading behavioral healthcare provider dedicated to treating alcohol dependency and drug addiction. Accredited by The Joint Commission and CARF for its high standards of care, Mountainside seeks out passionate and talented individuals to join its staff. We believe that every employee, regardless of position, plays a vital role in our success.

  

Here at Mountainside Treatment Center, we strongly prefer all employees to be fully vaccinated for Covid-19 (including regularly scheduled boosters) and the Flu as recommended by the CDC.
Mountainside is an equal opportunity/affirmative action employer and strongly encourages the applications of women, minorities, and persons with disabilities.



Key Skills
Accounting OperationsFinancial ReportingRegulatory ComplianceInternal ControlsTeam LeadershipBudgetingForecastingFinancial AnalysisGAAP ComplianceCommunication SkillsInterpersonal SkillsProcess ImprovementSystem OptimizationVariance AnalysisMentoringCollaboration
Categories
HealthcareFinance & AccountingManagement & Leadership
Benefits
Comprehensive Benefit PackagePaid Time OffPaid Holidays401(k) With Employer MatchingFree Meals While WorkingMonthly Wellness Reimbursement
Job Information
📋Core Responsibilities
The Senior Manager oversees day-to-day accounting operations and leads month-end and year-end close processes to ensure accurate financial reporting. They also develop and enhance internal controls and support audits.
📋Job Type
full time
💰Salary Range
$115,000 - $130,000
📊Experience Level
5-10
💼Company Size
296
📊Visa Sponsorship
No
💼Language
English
🏢Working Hours
40 hours
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