Seth Rosen
InvestorVenture Partner at Western Technology Investment
Boston, Massachusetts
Writes $100K β $5M checks Β· typically $1.5M
About
Seth Rosen is CEO of CustomMade, an e-commerce marketplace for custom products that he acquired in 2009, raised $30M in venture funding for, and repurchased and relaunched in 2015 to become the world's largest online custom jeweler. He also acquired and operates International Gem Society and Ganoksin, two niche websites in gemology and jewelry manufacturing with over 30M annual visitors combined. Rosen serves as a Venture Partner at Western Technology Investment focused on the Boston market and previously held the position of partner at Meredith & Grew in commercial real estate capital markets; he holds an MBA and MST from Bentley University and an undergraduate degree from Boston University.
Experience
- Standard DentalBoard Observer - Lender Representativecurrent2025 β presentMiami, Florida, United States
- Gold Words, Inc.Board Observer - Lender Representativecurrent2024 β presentAkron, Ohio, United States
- eCom Brand HoldingsBoard Observer - Lender Representativecurrent2023 β presentAkron, Ohio, United States
- Western Technology InvestmentVenture Partner | Private Credit, Special Situations & Direct Lending | Operator Backgroundcurrent2021 β presentBoston, MA
- CustomMadeFounder & CEOcurrent2015 β presentCambridge, Massachusetts
- CustomMadeCo-Founder, President & Board Chairman2009 β 2015Cambridge, MA
- International Gem SocietyOwnercurrent2012 β presentLincoln, Massachusetts
- The Ganoksin ProjectOwnercurrent2016 β presentLincoln, MA
- Boston UniversityFaculty Member β CPE Program (Capital Markets Class)2008 β 2009Boston, MA
- Colliers International, Boston (fka Meredith & Grew, Inc.)Vice President & Shareholder2004 β 2009Boston, MA
- East Coast Realty, Inc.Manager2001 β 2004Boston, MA
Education
- Boston UniversityBachelor's Degree, Psychology1999 β 2003
- Bentley UniversityMaster of Science in Taxation - MST2004 β 2007
- Bentley UniversityMaster of Business Administration - MBA, Concentration in Taxation & Structured Finance2003 β 2005
Skills & more
+12 more
E-commerceCapital MarketsFinanceBusiness StrategyMarketingValuationSalesBusiness DevelopmentCorporate FinanceJoint VenturesAnalysisLeadershipLanguages Spanish
- Massachusetts Notary Public β Commonwealth of Massachusetts
- Massachusetts Real Estate Broker β Bβoβaβrβdβ βoβfβ βRβeβgβiβsβtβrβaβtβiβoβnβ βoβfβ βRβeβaβlβ βEβsβtβaβtβeβ βBβrβoβkβeβrβsβ βaβnβdβ βSβaβlβeβsβpβeβrβsβoβnβs
- Series 65 - Uniform Investment Adviser Law Examination β FINRA
From Seth's professional profile.
Same school
Also attended Boston University192
+ 186 more
Also attended Bentley University73
+ 67 more
Shared employers
Also worked at CustomMade1
Also worked at Boston University21
+ 15 more
Also worked at Colliers International, Boston (fka Meredith & Grew, Inc.)13
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