Jonathan Kirn
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- Full Name
- Jonathan Kirn
- Title
- Senior Managing Director, Public Finance & Infrastructure; Co-Head of the Quantitative Group
- Firm
- Siebert Williams Shank & Co., LLC (formerly Siebert Cisneros Shank / Siebert Brandford Shank; email domain sbsco.com)
- Firm Type
- Minority- and woman-owned public finance / municipal investment banking firm (institutional — not an angel investor; see Background)
- Investment Stage
- N/A — municipal bond underwriting and structuring, not startup equity
- Check Size
- N/A for venture; leads institutional public-finance transactions up to ~$1.6 billion
- Sector Focus
- Municipal / public finance — water, sewer and stormwater; transportation and infrastructure; general government capital financing
- Geographic Focus
- United States, with deep concentration in the Washington, DC / Mid-Atlantic (DMV) region
- Location
- Washington, DC
Background
Jonathan Kirn is a Senior Managing Director of Public Finance & Infrastructure at Siebert Williams Shank & Co., LLC, where he has spent essentially his entire ~25-year career in the firm's Washington, DC office. As Co-Head of the firm's Quantitative Group, he works with governmental and public-agency clients to customize bond structures, negotiate bond sales, and ensure proper execution of senior-managed transactions. He brings more than twenty years of municipal finance and financial-analysis experience, with particular depth in water, sewer and stormwater financings and in transportation/infrastructure transactions. He holds Series 7, 50, 53, 63 and 79 FINRA securities licenses.
Kirn earned a Bachelor's degree in Business Administration and Management from Bentley University. Earlier in his career he held roles at Artemis Capital and Smith Michell Investment Group before his long tenure at Siebert (which has operated under the names Siebert Brandford Shank, Siebert Cisneros Shank, and today Siebert Williams Shank — the "sbsco.com" domain reflects that lineage). He is active in the industry association community, serving as President of the Association of Public Finance Professionals of the DMV (Washington, DC / Maryland / Virginia).
Important accuracy note: The stub classifying Jonathan Kirn as an "Angel Investor" investing in "Seed Rounds" is not supported by any source located in this research. The public record consistently and unambiguously describes him as an institutional municipal/public-finance banker at Siebert Williams Shank. No evidence of personal startup/angel investing, a seed-stage thesis, or venture check-writing was found. The sections below are framed around his verifiable professional role; unverifiable venture-investing details have been omitted rather than invented.
Investment Thesis & Focus
- Operates in public finance, not venture: structures and underwrites municipal bonds for state and local governments, utilities, and public agencies.
- Core sectors: water, sewer and stormwater utilities; transportation and infrastructure; general government capital improvement financing.
- As Co-Head of the Quantitative Group, his value-add is bond structuring, pricing/sale negotiation, and execution of senior-managed deals.
- In his own words on the firm's landmark DC transaction: *"I'm proud of the firm's work with the District bringing to market their largest offering to date."*
- No stated seed-stage or angel-investing thesis exists in available sources.
Notable Investments
- District of Columbia $1.589 billion tax-exempt GO bonds (Sept 2024) — largest bond issuance in the District's history; SWS served as bookrunning senior manager and Kirn led the transaction. Proceeds funded capital improvement projects, debt refunding, and repayment of Build America Bonds.
- Water/sewer/stormwater senior-managed financings — repeatedly cited as an area of notable experience.
- Transportation & infrastructure financings — senior-managed transactions for major public infrastructure projects.
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