Experienced Management


IMPACT’s management brings together over 85 years of capital markets and community development finance experience:


Mr. Brenner has 30 years of experience in financial services and capital markets, including 23 years in impact investing. He joined Impact Community Capital (“IMPACT”) in 2012, as the company’s first Chief Investment Officer. In January 2017, Mr. Brenner was named President and CEO following the retirement of the company’s founding CEO. He is responsible for developing and executing IMPACT’s strategic plan as well as overseeing operations and brand management. His responsibilities also include working closely with the Chief Investment Officer to manage $1 billion of investments and commitments for major institutional investors. The performance of these investments is measured in terms of both economic and impact returns. As Chief Investment Officer of IMPACT, Jeff managed two successful securitizations totaling $320 million, each consisted solely of affordable multifamily mortgages, that were well-received by the market.

Prior to joining IMPACT, Mr. Brenner spent 19 years in community development finance with Capital Impact Partners, serving as its Chief Financial Officer since 2006. Capital Impact is a Community Development Financial Institution dedicated to providing technical assistance and financing to underserved communities nationwide by working with community-based organizations in education, health care, healthy foods, affordable housing, elder care and community development. His primary responsibilities were i) Participation on the senior management team developing, guiding and implementing the organization’s mission, vision and business strategy; ii) Strategic management of the organization’s financial operations including, capital development, accounting, tax, audit and financial risk mitigation; iii) Overseeing information technology and human resource functions. Under Mr. Brenner’s leadership the company grew AUM from $250MM to $850MM and raised over $600MM in capital from institutional investors to finance projects that improve access to health care, elder care, healthy foods, housing and education for low income people and communities.

Mr. Brenner began his career with Union Bank of California and held various positions including Vice President of Corporate Banking where he helped to start the Technology Lending Group.


Mr. Lohmeier joined IMPACT in 2017 as Chief Investment Officer and has overall responsibility for the strategy and execution of IMPACT’s investment programs. This includes managing more than $1.0B of investments for major institutional investors. Responsibilities include, developing short and long term strategic investment plans, creating new investment funds and managing existing funds, investor reporting and investor relations. He oversees fund performance focused on both economic and impact returns.

Prior to joining IMPACT, Mr. Lohmeier spent 19 years in commercial lending and investment management, including nearly 12 years at Wespath Investment Management, a division of Wespath Benefits and Investments, serving as Managing Director – Investment Management since 2013. As Managing Director, Mr. Lohmeier led Wespath’s Equity, Fixed Income and Positive Social Purpose Lending Program (PSP) teams, providing operational oversight, tactical investment and risk management support and leading broad strategic investment initiatives. Previous to this role, Lohmeier managed Wespath’s PSP Lending Program for eight years. Wespath Investment Management provides investment solutions for over $22 billion in assets entrusted to it by United Methodist-affiliated plan sponsors and institutional investors. Mr. Lohmeier’s prior experience includes significant work with Fannie Mae, the Illinois Housing Development Authority and the Northern Trust Company.

Mr. Lohmeier holds a B.A. degree in Economics and Political Science from Northwestern University and a Master’s of Public Policy degree from The Harris School of Public Policy Studies, University of Chicago.


Ms. Tirman joined IMPACT in 2000 and has responsibility for IMPACT’s finance, accounting, tax and investor reporting activities. She is the architect of and implemented IMPACT’s accounting system, co-authored IMPACT’s financial policies and procedures and designed the investor reporting protocols for IMPACT’s various funds. She played an integral role in development of every investment fund formed by the company to date as well as each of IMPACT’s securitizations. Ms. Tirman developed and oversees the company’s enterprise risk management plan partnering closely with the CEO on risk identification, mitigation and management. Ms. Tirman also serves as the primary liaison to the company’s Audit Committee as well as to external information technology and human resource service providers.

Prior to joining IMPACT, Ms. Tirman consulted as an IT Project Manager for a diverse cross section of businesses from large financial institutions to startup companies and co-founded a technical and financial services consulting company. Ms. Tirman has 24 years of experience with administration, financial management, and operating controls.


Mr. Berg joined IMPACT in 2017 as Senior Vice President and Counsel and brings to IMPACT a wealth of experience in finance and commercial real estate. Prior to joining IMPACT, Mr. Berg was an Associate at Dechert LLP, where he advised investment banks, hedge funds, private equity funds and insurance companies on nationwide commercial real estate loan origination and securitization and real property acquisitions and dispositions. Earlier in his career, Mr. Berg worked at both J.P. Morgan Chase & Co. as a finance analyst in its Credit Portfolio Group and as a capital markets analyst at Centerline Capital Group Inc. (n/k/a Hunt Mortgage Group), where he was part of a team responsible for, among other things: (x) fund management of commercial real estate assets including whole loans, B-notes, mezzanine loans and CMBS and (y) capital markets financings of 4% LIHTC bonds.

Mr. Berg holds a B.S. degree in Economics from Duke University and received his Juris Doctor from The Benjamin N. Cardozo School of Law. Mr. Berg is admitted to practice law in New York and New Jersey.


Mr. Zimmerman joined Impact in 2014 as Manager, Investments. His responsibilities include managing the day-to-day operation of the Impact CIL program. This includes all aspects of the operation from loan underwriting to portfolio management. Prior to joining Impact, Mr. Zimmerman worked for the Carlyle Group where he evaluated potential equity real estate investment opportunities across asset classes including Multifamily, Commercial, Industrial and Retail. In addition, Mr. Zimmerman evaluated future and existing investments in high yield debt funds with a focus on both performing and nonperforming loans with underlying collateral across asset classes. As an aspect of his job he assisted in managing risk exposure in and across multiple funds. Before joining the Carlyle Group, Mr. Zimmerman was a member of the Public Finance Investment Banking Team at Piper Jaffray in San Francisco where he worked on structuring bond financings that helped build much needed infrastructure throughout the western region. During his tenure at Piper Jaffray, Mr. Zimmerman worked on bond issuances totally over $300M. Mr. Zimmerman began his career in the Mayor’s Office of the City of San Francisco as Assistant to the Director of Climate Protection Initiatives. There he worked with City Departments and private enterprises to coordinate Energy Policy for the City. Mr. Zimmerman holds a B.A. from Columbia College of Columbia University.