Oasis Outsourcing


Maria Petroni Professional Employer Consultant Oasis Outsourcing 7675 Dagget St. Suite 200 San Diego, CA 92111 Tel: 619-541-1849 Cell: 619-541-1849 Fax: 855-306-2025 [email protected] www.OasisAdvantage.comhttp://www.oasisadvantage.com/ www.OasisAdvantage.com/mpetroni

Email: [email protected]

Website: www.OasisAdvantage.com/mpetroni

Mark Sinatra is President of the Western Region for Oasis Outsourcing, the largest privately-held HR Managed Services firm in the country.  Prior to his current role, Mark was CEO of Staff One HR from 2008 to 2018.  Mark led Staff One HR through a period of substantial growth highlighted by achieving the Dallas 100 twice and Inc. 5000 list four years in a row, and culminating in Staff One HR’s sale to Oasis Outsourcing in December 2017.  Before joining Staff One HR, Mark co-founded Gordian Capital, a private investment company that focuses on making long-term investments in lower middle market companies.

Mark is Chairperson of First3 Years, which is a non-profit focused on the healthy development of infants and toddlers, a Board Director with Social Venture Partners, and a member of Young Presidents’ Organization (YPO).  Mark is a MBA graduate of the Wharton School of Business, and holds a BA in Economics from Fordham University.  He holds the SHRM-CP Certification, is a Certified Predictive Index  analyst, and is a graduate of the Stagen Integral Leadership Academy.


Conditions of EO Membership Application and Renewal:
Every member who applies or renews their membership agrees to comply with the Policies and Procedures, Bylaws and Code of Conduct of Entrepreneurs' Organization. Current members must complete the online renewal form acknowledging review of the organization's Policies and Procedures, Bylaws and Code of Conduct.

Stay Connected

Fill out the contact information below to receive EO's newsletter.