Who We Are

Fieldstone Ventures (FSV) is founded and managed by a team of experienced senior management executives and investment professionals with extensive track records of investing in, building, managing and exiting companies in the technology, healthcare, manufacturing, financial services, travel & transportation, media and infrastructure sectors.

FSV and its predecessor REM Investments, LLC was founded in 2004 with partners who have a 20+ year history of advising, investing and operating businesses together. In addition to advisory services, FSV manages an exciting portfolio via its role as a direct investor of the FSV Principals’ capital and coordinator with third party investors or financiers. The FSV principals have a track record of success in capitalizing on niche market opportunities, building growth-oriented companies and divesting of such investments in three to seven-year intervals. FSV currently has a portfolio of active investments and works closely with the company management teams to build high growth businesses and strong operational foundations.

The FSV team brings a solid base of advisory skills and management experience with each of the partners having run businesses ranging from startup through multi-billion dollar enterprises. Over the last 20 years, we’ve closed more than 50 acquisitions, merging the operations of numerous companies in support of our growth, roll-up and diversification strategies. We distinguish ourselves with hands-on experience in direct investing and running companies, but are grounded enough to learn from our mistakes. At times FSV partners will join a company management team on an extended basis, in addition to providing on-going management support, advisory and other consultative services.


Meet the Team

  • Jim Dullum Managing Partner Jim has over 30 years of executive business management and strategic planning experience with two Fortune 500 companies and the start-up and operations of eight other companies. He holds an MBA from the Harvard Graduate School of Business and a BA Cum Laude in Mechanical Engineering from the Georgia Institute of Technology.



  • Ralph Manaker Managing Partner Ralph has over 30 years experience in mergers and acquisitions and was instrumental in the creation of BCD Travel, a $15 billion global travel management company. Ralph has a BA in Mechanical Engineering and a Doctorate of Law from Syracuse University.




  • Mark Abe Partner Mark has served in key executive roles across a broad range of companies — from start-up to global multi-nationals — with over 25 years of strategic planning, business operations and executive management experience in the consulting, technology services, transportation, manufacturing, aerospace and healthcare industries. Mark received his Bachelor of Science in Aerospace Engineering from the University of California, Los Angeles.
  • Greg Mathy Partner With over 27 years of strategic planning and financial management experience in the private equity, consulting, technology services, transportation, logistics, and software industries, Greg has played a key executive role with a wide-range of companies -- from start-up to Fortune 100. Greg received his Juris Doctor degree (Corporate Law/Taxation) from the Creighton University School of Law, and holds a Master’s degree in Business Administration (Corporate Finance) and a Bachelor of Science degree in Business Administration (Accounting/Finance) from Creighton University in Omaha, Nebraska.
  • Paul Lambert Partner Paul has over 25 years of leadership experience ranging from public company business unit management, engineering programs and corporate sales to entrepreneurial business creation, funding, acquisitions and mergers. Paul has held executive roles in the semiconductor, automotive, and telecom industries as well as founding three companies. Paul earned a Bachelors of Science degree in Electrical Engineering from Carnegie Mellon University.