Isaac Lowenbraun is Senior Managing Director and Head of Fixed Income and Derivatives at Guardian, where he oversees the firm's public and private fixed-income portfolios and derivatives strategies. His investment responsibilities include corporate credit, private debt, infrastructure debt, fund finance, and securitized assets.

With extensive experience managing both insurance general account and total-return portfolios, Isaac focuses on balancing income generation, capital efficiency, liquidity, and risk within a liability-driven investment framework. Prior to joining Guardian, he held portfolio management, quantitative analysis, and risk management roles at Morgan Stanley and Salomon Smith Barney.

Isaac serves on the ACLI Investment Subcommittee, the Investment Subcommittee of the Life Insurance Council of New York (LICONY) and is a member of the Economic Club of New York. He holds a B.S. in Accounting from Touro University and an M.B.A. in Finance from Fordham University.

Guardian is making a difference in people’s lives across the US as a leading mutual company, providing life and disability insurance, dental and workforce benefits, retirement and wealth solutions. But we offer more than products. We partner with our customers to inspire well-being® — mind, body, and wallet®. Since 1860, when a community of immigrants joined together to protect their families and companies, we have embraced the spirit of mutuality as a mindset. We provide solutions that build financial confidence for individuals, strengthen businesses, and help employees thrive. Working as your partner, we invest in you, holding ourselves accountable not to shareholders, but to your long-term well-being. All of our colleagues share this mindset. Our collaborative culture extends beyond our workplace to uplift communities all around us. Because we believe value grows when it’s shared. We're here for you today and we'll be here to deliver on our promises tomorrow. Our commitments rest on a strong financial foundation, which includes a 2026 dividend allocation of $1.7 billion, the largest in the company’s history. For more information, visit guardianlife.com or follow us on Facebook, LinkedIn, and YouTube.