ABOUT US
TEAM HIGHLIGHTS
01
60+ Years of Experience
Founding partners have over 60 years of combined complementary experience in financial services and middle-market companies with expertise in business services, real estate and real estate services, construction and industrial as well as multi-unit industries.
History as long-standing and established senior leaders at Blackstone, Goldman Sachs and Mackinac/Accordion Partners. Strong personal and professional relationships fostering trust, loyalty and collaboration.
02
Individual Proficiencies
William: Sourcing, investment due diligence, public and private capital investing, risk underwriting, deal negotiations, capital markets and financial structuring.
Nathaniel: M&A advisory, industry coverage, due diligence, sell-side readiness risk underwriting and capital raising.
Nishant: Operational value creation, financial and business restructuring, public and private capital investing and several roles as CEO, CFO and CRO.
03
Leadership & Value Proposition
Founding partners are industry leaders in their respective areas.
Focus on minimizing risks related to execution, business operations, corporate culture and overpayment.
Targeting opportunities for successful timely exits after multiple expansion and operational improvements.
Supported by a deep bench of seasoned operating partners and strategic advisors, providing hands-on expertise across operations, growth strategy, and value creation.
CO-FOUNDERS
William Sirignano
(Managing Partner)
18 years of experience, including 11 at Blackstone Credit (BXC) as Managing Director and senior originator specializing in public/private investing, risk underwriting, capital markets, and complex transaction structuring
Led $13B+ in private and opportunistic credit across business services, real estate, gaming, hospitality, internet infrastructure, technology, and industrials
Co-led BXC’s multi-billion Opportunistic Credit Strategy, helped build GSO and BXC’s private credit platforms, and co-headed alternative credit capital markets
Supported portfolio companies with asset management and cross-selling via BXC’s Advantage Team
Prior investment professional at hedge funds Satellite Asset Management and Karsch Capital; started career at Lehman Brothers in investment banking
Board roles include Logan’s Roadhouse and Production Resource Group (~$1.5B sales)
Active early-stage investor and Operating Partner at Mission 3A Venture Studio
BA, Williams College; Member, Alumni Development Council, The Brunswick School
Nathaniel Bristol
(Managing Partner)
18 years experience at Goldman Sachs Investment Banking serving as a Managing Director within its Global Industrials division
Led client coverage in:
– Building products & construction
– Industrial distribution, transportation & logistics
– Homebuilders & real estate services
– Business services sectors
Executed more than $100 billion of M&A, anti-raid, anti-activism, take-private transactions
Led 6 IPOs; dozens of debt and equity underwritings
Senior team leader managing more than 40 junior and senior bankers across teams
Clients ranged from large cap Industrials (e.g., GE, Lockheed Martin, Cummins) to small- and mid-cap public and private companies
Treasurer, Board of Trustees, The Groton School
Series 7 & 24 licensed financial professional
BA, Williams College
Nishant Machado
(Head of Asset Management)
20 years of experience at Mackinac Partners serving as the Co-Head of the Turnaround & Restructuring practice and the Head of the Food & Beverage and Leisure & Hospitality segments
CEO, CRO, CFO, COO and Lead Restructuring Advisor for lower middle market companies including Real Mex, Sullivan’s Steakhouse, Eddie Merlot’s, Romano’s Macaroni Grill, Boston Market, Logan’s Roadhouse, Veggie Grill,Corner Bakery, Summerland Wine Brands, Windsor Steel, Quantum Fuels Systems, Pacific Monarch Resorts, and Long Meadow Ranch
Served on the Board of Directors of several companies differing in scale including Native Foods Café, Great Destinations, Romano’s Macaroni Grill, Sullivan’s Steakhouse, Checkers and Rally’s, Sbarro and Mach Point
Founded Great Destinations Inc., a timeshare resale platform; sold to Interval Leisure Group (NASDAQ: ILG)
Founded Dividend Restaurant Group, restaurant acquisition platform with ~$130 million revenue
Certified Insolvency & Restructuring Advisor (CIRA); Member, Young Presidents’ Organization (YPO); M&A Advisor 40 Under 40
BA, Purdue University
OPERATING PARTNERS &
STRATEGIC ADVISORS
*Altivare is in active discussions with additional Operating Partners and Strategic Advisors.
Gregory Otto
(CRE, Logistics, Business Services, Construction)
Greg brings 15+ years of global experience across real estate, industrials, and logistics, with a foundation in maritime operations and national security
He served on the board of Monmouth Real Estate Investment Corp. (NYSE: MNR), a 25 million sq. ft. industrial REIT sold for ~$4B, and is building Steamboat Capital, focused on industrial and logistics investments
A former founding CEO at Seapath (a maritime investment arm of the Libra Group), and CFO/investor at trade-tech platform Secro, Greg has led $200M+ in deal execution
Earlier, he spent a decade at the U.S. State Department in global maritime security roles and is currently a Lieutenant Commander in the U.S. Navy Reserve with a Top Secret/SCI clearance
Greg holds an Executive MBA from Saïd Business School, Oxford University, a Master’s from the U.S. Naval War College, and a B.S. from the U.S. Merchant Marine Academy
He lives between New York and Georgia with his wife, Sharon
Jere Harris
(Business & Consumer Services, Equipment Rental, CRE)
Founder, Former 40+ year CEO, Executive Chairman & Chief Creative Officer – Production Resource Group (PRG)
Visionary leader and transformative force in global entertainment and event production
Founder PRG, now the world’s premier provider of integrated solutions across theatre, film, TV, broadcast, concert touring, live events, and hospitality
Since founding Harris Production Services in 1982 and PRG in 1995, has driven growth via strategic acquisitions in lighting, audio, video, automation, scenic design, and labor solutions
Expanded PRG to 43 locations on five continents with 350+ patents and trademarks shaping the future of live and recorded entertainment
Fourth-generation theatre pioneer who began working in scenic design at age 16
Produced landmark shows including EFX at MGM Grand (8-year run) and Broadway’s Spider-Man: Turn Off The Dark, the most technically ambitious Broadway production to date
Recipient of four Tony Awards, multiple Drama Desk Awards, an Engineering Emmy, and the Parnelli Lifetime Achievement Award
Jere is a dedicated philanthropist, serving as Vice President of the Brant Point Association, a board member of ZO Skin Care, and a founding board member of Buying Time – The Danny Butler Memorial Fund.
James de Gorter
(Technology-Focused CRE, Self Storage)
Co-founder of Union Realtime (dba Radius+), the leading data analytics platform for the self-storage industry
Has led Radius+ since 2016, transforming how operators and investors access industry-leading market intelligence
Drives the delivery of high-quality pricing, facility, and competitive data at scale
Former tech investor on Wall Street for eight years, with experience at Royal Bank of Canada
Specialized in emerging technologies and data-driven business models
Brings a unique blend of finance, technology, and analytics expertise to help clients make smarter decisions
Outside the office, enjoys family time, golf, and holding his title as NKF Ping Pong Champion
Matthew Slaine
(Consumer-Focused Multi-Unit, Franchisee/Franchisor)
12 years as CEO across multi-unit restaurants, fitness studios, and media services, primarily in private equity-backed companies.
Current CEO of Princeton Medspa Partners, a private equity-backed platform of non-invasive aesthetic service providers in the lower middle market.
Former CEO of OT Growth Partners (2022–2025), overseeing 60 Orangetheory locations across four states and leading two successful acquisitions in 2023.
Former CEO of Quality Restaurant Group (2019–2022), expanding to 350+ franchise restaurants in 15 states, generating $350MM+ in revenue with 9,000 employees. Directed $130MM in 14 M&A and 75 real estate transactions over three years.
Earlier roles include CEO of Progressive Business Media, sold to Gannett, and investment banking and asset management roles at Deutsche Bank and Goldman Sachs.
Member of YPO International and YPO Southern Seven; recipient of multiple 40 Under 40 and Fastest Growing Company awards.
MBA, NYU Stern School of Business | BA, Dartmouth College.
Seth Gittlitz
(Consumer-Focused Multi-Unit, Franchisee/Franchisor)
13 years of C-suite leadership in multi-unit restaurants, hair salons, and med spas, with extensive private equity and LP partnership experience.
Former CFO of Major Food Group (2015–2019), overseeing finance, HR, IT, purchasing, and risk across 25+ acclaimed restaurants, including Carbone, The Grill, The Pool, Dirty French, and Sadelle’s.
Current Executive Chairman of Young Medical Medspa, a 16-unit PE-backed roll-up; hired a new CEO and launched a de novo growth strategy.
Former CEO & Co-Founder of Hair Cuttery Family of Brands, originating the acquisition out of bankruptcy, raising sponsor capital, and leading a turnaround of 500+ salons nationwide—cutting costs, stabilizing operations, and earning PR Week’s Best in Employee Engagement award.
Earlier roles include CFO of Ricky’s NYC, a 29-location beauty retailer.
MBA, Columbia Business School | BFA, NYU Tisch School of the Arts.
