About Us

  • Dan Flamholz
    Dan Flamholz
    Principal
  • David Berg
    David Berg
    Principal
  • Nicki Berg
    Nicki Berg
    Principal/ Brokerage & Leasing Services
  • Austin Berg
    Austin Berg
    Asset Manager
  • Jonathan D. Manekin, MSRE
    Jonathan D. Manekin, MSRE
    Director of Asset Management
  • Dominic H. Levis, EA MST
    Dominic H. Levis, EA MST
    CFO
  • Matt Jackson
    Matt Jackson
    Brokerage & Leasing Services
  • Andrea Bonaventura
    Andrea Bonaventura
    Senior Accountant
  • Lindsay Taylor
    Lindsay Taylor
    Director of Construction & Properties
  • Michael Brinegar
    Michael Brinegar
    Director of Property Management

GEt In Touch

Dan Flamholz
Principal

As co-founder of Greenspring Realty Partners, Dan strives to maintain the balance between creating strong relationships, curating thoughtful investment and development opportunities, and building on his passion for industrial real estate. Dan oversees the firm’s investment, development, leasing, and growth strategies while also playing a roll in the portfolios day-to-day operations.

Born and raised in Baltimore, Dan is active in several area non-profits and loves spending time with his wife and chasing around his four young children.

Contact Dan Flamholz
dan@greenspringrealty.com
(410)977-4738

David Berg
Principal

The third generation in a family demolition and scrap business, David oversaw the maturation of The Berg Corporation over a 40-year period from a local subcontractor to a nation leader in demolition and environmental remediation.

Expanding to Real Estate in the late 2000‘s, David numbers driven approach has allowed him to recognize opportunities with outsized risk-adjusted value that are often overlooked by conventional real estate companies.

David holds a Bachelor of Science in Accounting from the University of Maryland and is a CPA in the State of Maryland.

Contact David Berg
dberg@bergdemo.com
(410)274-2525

Nicki Berg
Principal/ Brokerage & Leasing Services

Nicki Berg is a Principal with the Greenspring Realty Partners in Baltimore, MD and has over ten years of diverse experience in leasing, valuation consulting, site selection, negotiation and acquisition.

Since joining Greenspring Realty in 2020, Nicki has focused her time on leasing and adding value to the firm’s portfolio, while overseeing their third party brokerage.

Prior to joining Greenspring Realty Partners, Nicki Berg spent two years as a Vice President with CBRE, Inc. and spent four years at the Cushman & Wakefield Retail Services Group in Chicago, Illinois focused on Shopping Center leasing.

Nicki holds a Bachelor of Science in Communications from the College of Charleston and is a member of the International Council of Shopping Centers (ICSC).

Contact Nicki Berg
nicki@greenspringrealty.com
(410)274-6107

Austin Berg
Asset Manager
Jonathan D. Manekin, MSRE
Director of Asset Management

With over two-decades of experience in the commercial real estate industry, Jon has accrued a deep, working knowledge of the Baltimore-Washington Market and the various product types and players which comprise it.

Jon began his career as a leasing associate in Washington DC, working with GVA/Advantis in their Law Firm Practice Group and servicing other major institutions and clients of the firm.  He then transitioned back to Baltimore where he joined the merchant developer Chesapeake Real Estate Group, which specialized in Urban Infill redevelopment and Class A Warehouse construction.  In 2008 Jon joined Corporate Office Properties Trust (COPT) a leading office REIT based in Columbia, Maryland.  Jon served on their asset management team with portfolio responsibilities which extended throughout the company’s Maryland portfolio.  Jon later joined Colliers | Baltimore, to help grow their Landlord / Agency Practice Group, working on high profile assignments such as the leasing of Harbor Point in Baltimore’s Harbor.  That work continued when Colliers | Baltimore was acquired by JLL and Jon transitioned to that platform.

In 2017 Jon left JLL to join Greenspring Realty Partners as a Director and was responsible for growth the firm’s third-party brokerage business.  During that time, he represented several local and national clients in their commercial real estate needs.  Working as a trusted real estate advisor, Jon worked closely with clients and various stakeholders to develop custom strategies to achieve targeted goals.  Beginning in 2023, Jon now runs Greenspring’s Asset Management Practice where he seeks to retain and add value to the firms growing portfolio, while also servicing new and existing clients.

Jon graduated from the Gilman School in Baltimore and the University of North Carolina – Chapel Hill.  He has a Masters Degree in Real Estate from the Hopkins Carey School of Business and serves on the Board of Trustees of Jubilee Baltimore and the Chesapeake Bay Foundation.  Jon and his wife Samantha are the proud parents of three children and reside in Baltimore County.

Contact Jon Manekin
jon@greenspringrealty.com
(410)979-0404

Dominic H. Levis, EA MST
CFO

Dominic, an enrolled agent to practice before the Internal Revenue Service, has over 20 years experience in the public accounting arena. He worked for the Reznick Group, a large regional public accounting firm that specialized in real estate auditing and tax services. After working for the Reznick Group for 7 years, he ventured out with 2 other partners to start a small public accounting firm for 6 years. During this time, he realized his real passion came from being able to assist his clients, large and small, in the everyday hurdles they are experiencing. He enjoys the hands on approach in helping businesses and non profit organizations better utilize their time while also providing them with beneficial advice to grow their business / organization in the right direction. Dominic has performed multiple (I.R.S Code Section 1031) like kind exchanges.

Dominic graduated with Bachelor of Science in Accounting from Mount St. Mary’s University and has a master’s in taxation from University of Baltimore.  Dominic enjoys cross fit and resides in Northern Baltimore County with his wife and three kids.

Dominic was selected as a 2015 Smart CEO Finalist honoring Baltimore’s Top Accountants and Attorneys. Read the Smart CEO issue here.

Matt Jackson
Brokerage & Leasing Services

Matt grew up in Phoenix, MD with four brothers while attending Loyola High School in Towson and Johns Hopkins University in Baltimore City.

Matt’s work experience has taken him from a small, local startup company (ATMAmerica/EFMark) to a global firm (MICROS Systems) in the Baltimore area. Currently, he is the Director of Real Estate Services for Greenspring Realty Partners.

Matt resides in the Baltimore area with his wife of 20+years and two daughters. In his personal time, he coaches his daughter’s sports teams.

Contact Matt Jackson
matt@greenspringrealty.com
(443)608-4596

Andrea Bonaventura
Senior Accountant

Andrea comes to Greenspring Realty Partners with three years of progressive and diversified experience in accounting including financial analysis and reporting, budgeting, bank reconciliations, accounts receivable, billing, collections, and payroll.

Prior to joining L&H she was a Finance Manager at Amwins Connect Administrators, a Controller for a manufacturing company and a Controller for a car dealership.

Andrea resides in Baltimore County with her husband and children. She enjoys spending time with family and traveling.

Lindsay Taylor
Director of Construction & Properties

Lindsay oversees the property management of the real estate portfolio for Greenspring Realty Partners (GRP). He specializes in construction project management, land development, project estimating, and tenant relations.

Prior to joining GRP, Lindsay was Director of Operations for Florida Rock Properties and served as senior project manager for local developer, Obrecht Properties.

Contact Lindsay Taylor
ltaylor@bergdemo.com
(410)924-6626

Michael Brinegar
Director of Property Management

Mike Brinegar has been involved in Commercial and Residential Property Management for his entire career, in excess of 20 years.  Most recently, Mike spent 13 years as the Lead Supervisor at WPM, a Nationally recognized Property Management firm located in the Mid-Atlantic region.

Mike’s responsibilities include tenant relationship coordination, project & vendor management, and tenant build-out facilitation.

Mike lives in Anne Arundel County with his wife.  He enjoys fishing and being outdoors on his time away from Greenspring Realty.

Contact Michael Brinegar
michaelbrinegar@gmail.com
(301)305-5648