What states does Aspen HR serve?

Aspen HR currently operates in the following states: MA, CT, RI, NH, ME, VT, NY.

Is Aspen HR IRS CPEO certified?

Yes, Aspen HR is an IRS Certified Professional Employer Organization (CPEO). This certification means they have met strict financial, reporting, and background requirements set by the IRS, providing additional tax advantages and liability protections for client companies.

What size companies does Aspen HR work with?

Aspen HR typically serves businesses with 5 to 500 employees. If your company is outside this range, contact them directly to discuss your options.

What services does Aspen HR provide?

Aspen HR offers the following HR and employer services: Payroll Processing, Employee Benefits, HR Management, Workers Compensation, Compliance Support, Recruiting & Hiring.

How do I get a quote from Aspen HR?

You can request a no-obligation quote from Aspen HR by filling out the form on this page. A PEO specialist will review your business details and connect you within one business day.

Aspen HR

IRS CPEO CertifiedRegional PEO

Boston, MA·Founded 2015·5-500 employees

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States Served

Services

Industries

5-500

Employees

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About Aspen HR

Aspen HR is a Walnut Creek, California-based IRS CPEO certified Professional Employer Organization founded in 2017. Known for its white-glove service model, Aspen HR built a strong niche serving alternative investment firms, private equity portfolio companies, search funds, professional services, fintech, software, and healthcare clients across all 50 states. The company earned CPEO certification in June 2025 and was named to the Inc. 5000 list of fastest-growing companies four consecutive years. In December 2025, Aspen HR was acquired by Engage PEO, one of the country's leading nationally certified PEOs, expanding Engage's California presence and adding Aspen's private equity ecosystem expertise to the combined organization.

IRS Certification

IRS Certified PEO (CPEO)

Certification active · Verified by PEO Authority

Certified ✓

The IRS Certified PEO (CPEO) designation is awarded by the Internal Revenue Service to PEO companies that meet rigorous standards for financial health, tax compliance, and operational integrity. Aspen HR holds CPEO status — a distinction held by fewer than 15% of PEOs in the United States.

Federal Tax Liability

As a CPEO, Aspen HR assumes sole liability for federal employment taxes on wages paid — protecting your business from tax exposure.

Annual Financial Audits

CPEOs undergo independent CPA audits annually and must maintain a surety bond, ensuring fiscal accountability and solvency.

IRS Reporting

Aspen HR files employment taxes under their own EIN as CPEO, simplifying your year-end tax obligations and eliminating duplicate filings.

Why businesses choose Aspen HR

✓IRS CPEO certified — maximum federal tax protections for co-employment clients

✓White-glove service model — premium, personalized HR support for sophisticated clients

✓Inc. 5000 fastest-growing company four consecutive years

✓Deep private equity and alternative investment firm expertise

✓Serves search funds, portfolio companies, fintech, software, and healthcare clients

✓Now part of Engage PEO — backed by a top 10 national PEO with CPEO and ESAC credentials

✓Strong California market expertise with national all-50-state coverage

Company Details

Headquarters

Boston, MA

Founded

2015

Employees Served

5-500

CPEO Certified

Yes - IRS Verified

Coverage

7 states

Company Type

Regional PEO

Aspen HR in Your State

Browse PEO options and compare providers in each state where Aspen HR operates.

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Pros & Cons

Pros

✓

White-glove service

Premium, personalized service model designed for sophisticated clients.

✓

Private equity expertise

Deep experience serving PE portfolio companies, search funds, and alternative investment firms.

✓

IRS CPEO certified

Maximum federal tax liability protections for client businesses.

✓

Engage PEO backing

Acquired by a top 10 national PEO with CPEO and ESAC dual credentials.

✓

Inc. 5000 four years

Consecutive recognition as one of the fastest-growing companies in America.

−

Cons

−

Acquisition transition

December 2025 acquisition by Engage PEO — integration and service model changes ongoing.

−

Premium model cost

White-glove positioning commands a premium — may not be cost-effective for all small businesses.

−

No transparent pricing

Custom quotes required — no published rates online.

PEO Authority Editorial Note

Aspen HR built one of the most distinctive niches in the PEO industry — white-glove service for private equity and alternative investment ecosystems — before being acquired by Engage PEO in December 2025. Clients now benefit from the combined organization's expanded resources. Best for: private equity portfolio companies, search funds, alternative investment firms, and professional services companies that want sophisticated, white-glove HR support.

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