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Our Team

Who We Are

Doug Varkaris
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Doug Varkaris

Managing Director, EVP

20+ year veteran Entrepreneur and Real Estate Businessman. Raised Venture Capital and served on the Board of Silicon Valley Start-up’s. Over 15 Years experience in Institutional Grade Commercial Real Estate Assets and Energy Projects serving in Executive roles.


Worked under Leading National Brands like Prudential and Marcus and Millichap. International and Domestic Specialist in complex transactions. Conducted approx. $5.3 Billion dollars worth of transactional consulting advisory and financial projects. Access to unique Private Off Market opportunities via the huge network of C-Suite professionals built up over 25yrs. Access to hundreds of Sovereign Funds, Private Equity Investment Trusts, Hedge Funds and Family Offices.

Axel Tillmann

Axel Tillmann

Partner, SVP

Axel Tillmann is a serial entrepreneur having run a few companies in Europe and USA.  For the last 6 years he has been coaching, and mentoring startup and companies, including the spin-out of a $20B Japanese corporation.  Axel is comfortable in many different verticals and has embraced entrepreneurship as a way of life.

Prior to his current roles Co-founding EIR at Pitch Global (recent event and ongoing partner of UC Berkeley Global) and Managing Director of Alpha Consult he was CEO of a US arm of a Fund-of-Funds and managed about $150M in portfolio investments. Positive exits included SMI to Intel and BrightSource Energy.  His operational experience includes Arcsight (acquired by HP), Azure Technologies (acquired by GN), ENIRA Technology (acquired by ArcSight) to name a few.

An accomplished speaker and author well known for his technical expertise, Mr. Tillmann advises numerous industry organizations and served on several Boards – and steering the companies to success.

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Stephanie Lindstrom

Stephanie Lindstrom

Partner, SVP Science and Technology

Stephanie Lindstrom is a Biochemist and Protein Engineer with R&D experience in Biotech/Academia with collaboration across interdisciplinary fields and a focus on innovation and scientific advancement. As Head of Business Development & Investor Relations for Rejuvenation Tech, a Stanford spinoff with a valuation of $1Billion+ focused on age-related diseases and extending healthspan, she collaborated with the CEO & COO to execute strategic partnerships, spearheaded capital fundraising and drove decision making for multi–$Million capital raise. As a core member of Genentech’s Protein Engineering team, she conducted research at the interface of biologics discovery and protein engineering to develop next-gen therapeutics that were selected for clinical trials for treatment of large tumors, earning her team multiple U.S. Patents.


She is Co-Director of Longevity Global, Founding Team at 2060.Life Foundation, Founding Member of NCL-SR serving in increasing roles as President & CEO and District 12 Officer overseeing 19 chapters and executive teams. She’s served on several Boards as Board of Director and Board Advisor. She is adept at influencing stakeholders with her executive presence, strong business acumen, and expert negotiation skills to maximize high level corporate impact. Merging her scientific training, business development strategies and knowledge of the investment landscape, she is passionate about advancing science, technology and innovation.


Faculty at Geneva College of Longevity Science, MS Chemistry & Biochemistry, BS Biochemistry (SFSU and UCLA). Awarded U.S. Department of Education Graduate Fellowship, Edwin Motell Scholarship for Outstanding Scholastic Achievement in Chemistry & Biochemistry.

Constantine Meletiou

Dr. Constantine Meletiou

Senior Vice President

Dr. Constantine Meletiou is a seasoned professional with over 35 years of international experience (USA, Europe, Middle East & Africa). Constantine has served as a key member of Global Leading Consulting Groups and renowned Client Organizations and has successfully been engaged in international operations, projects and major capital investment programs with an aggregate GDV exceeding $30 billion across various industry sectors such as Manufacturing, Construction, Infrastructure, Energy, Real Estate Investments & Development and Alternative Investments.  He has recently served as the President of a leading Alternative Investment Funds (AIF) Management Group heading the Capital Raising & Distribution in several sectors.

Constantine brings a wealth of relationships in both private investment and public sector institutions across the world and has a well-rounded experience in Strategic Business & Investment Advisory with special emphasis on Global Fundraising, Sourcing of International Strategic Investors, Investment Implementation and Direct Acquisition of High-end RE assets in the global market.

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David A. Lane

David A. Lane

Senior Advisor, Executive Member

David started his career in commercial banking. With over 25 years of investment banking experience, having successfully advised and completed transactions globally with a strong focus in Institutional Real Estate, International Relations and M&A representing clients in the US, Latin America, Europe, and Asia.


He specializes in equity and debt investment opportunities, investment sales, debt, and equity financing CRE portfolio sales, acquisitions dispositions and Mid-Market M&A in US and cross-border while bringing a wealth of experience and strong negotiation skills to every transaction. 


David has earned his Bachelor’s in Management and Finance and a Master’s degree in International Business with a minor in Information Systems. Had the opportunity to attend an executive program at Kings College in Cambridge, UK. He is fluent in English and Spanish, with working proficiency in French and Mandarin Chinese. Licensed Broker in Florida and California.

Donald W. Wise

Dr. Donald W. Wise

Senior Advisor, Executive Member

Dr. Donald W. Wise (USC Doctorate Class of 1977; Cornell University School of Hotel Admiration Summer of 1990-1991) is one of the nation’s preeminent real estate hospitality investment bankers. 


He is the Co-founding Managing Director and Chairman of Newport Beach-based Turnbull Capital Group, and the Founder of the firm’s high-profile Hospitality Investment Banking practice. He previously served as the de facto Founder of CBRE Hotels in 1984 and shepherded that practice for 15 years with that firm. He previously served as the Founder and Managing Director of the Hospitality lending practice at Johnson Capital, now Walker & Dunlop, and shepherded that practice for 125 ladies and gentlemen and 22 offices. Dr. Wise is known as one of the most “connected” real estate hospitality investment bankers throughout the worldwide hospitality and real estate investment community at large. 


As a hospitality investment banker Dr. Wise has over 39 years of real estate transactional and financing experience encompassing nine billion dollars of real estate transactions and financings.  As a seasoned professional, Dr. Wise distinguishes himself by seeking out projects that are more difficult and in which he and his team can provide a niche specific value-add.

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Olivier Khalil

Vice President

10+ year Director/Partner background within Spring Mountain, Bainbridge and BNY Mellon. Highly-skilled investment and relationship growth expert. Exceptional background within complex Real Estate and Commercial property funding. International and Domestic experience. History of Deal Analysis, Due Diligence and closing billion-dollar transactions.

Olivier Khalil
Olivier Khalil
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