About Xenium

Xenium is an HR & Employer Services provider. Xenium serves companies that have limited or no internal HR resources, and those that have internal HR staff who can benefit from specialized support and training.

Xenium also manages the most successful PEO (Professional Employer Organization) in the Portland metropolitan area. Xenium’s PEO gives small and medium-sized companies access to best practice advice and an economy of scale for integrated services including HR, Payroll, Group Health Benefits, 401k, and Workers’ Compensation.

Xenium’s PEO offers all of this in a very cost-effective model, and allows business owners the freedom to focus on what they do best—the strategic and operational side of growing their business.

Xenium HR
7401 SW Washo Court, Suite 200
Tualatin, OR 97062‐8343
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Xenium’s Background

Operating as an HR services company since 1995, Xenium formed a separate corporation under the Stoller Group to serve Oregon employers.

The Stoller Group of companies also includes Express Employment Professionals, Express Staff Management, Specialized Recruiting Group and Stoller Vineyards.


The Xenium staff is active in a variety of professional organizations.  These organizations include the National Association of Professional Employer Organizations (NAPEO), the Society for Human Resource Management (SHRM), the Northwest Professional Employer Association (NWPEA) and the American Payroll Association (APA).  Maintaining our skills through continuing education and participation in professional organizations gives Xenium clients an added level of expertise. 

Xenium has been a member of the National Association of Professional Employer Organizations since 2000.  NAPEO, based in Alexandria, Virginia, is the recognized "Voice of the PEO Industry®." NAPEO has more than 700 PEO members found in all 50 states, representing more than 70 percent of the revenues of the $68 billion PEO industry. PEOs enable clients to cost-effectively outsource the management of human resources, employee benefits, payroll and workers' compensation. This allows PEO clients to focus on their core competencies to maintain and grow their bottom line.

The Society for Human Resource Management (SHRM) is the world's largest association devoted to human resource management. Representing more than 210,000 individual members, the Society's mission is to serve the needs of HR professionals by providing the most essential and comprehensive resources available. As an influential voice, the Society's mission is also to advance the human resource profession to ensure that HR is recognized as an essential partner in developing and executing organizational strategy. Founded in 1948, SHRM currently has more than 550 affiliated chapters and members in more than 100 countries. 

The American Payroll Association is the professional society for Payroll Professionals. Founded in 1982 it is run by a professional staff under the direction of the Executive Director, the member President, and Board of Directors. The Association pursues the following objectives: To increase the Payroll Professional's skill level through education and mutual support, to obtain recognition for payroll work as practiced in today's business and legislative environments and as a professional discipline, to represent the Payroll Professional on the federal, state and local level and to provide public service education on payroll and employment issues.


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