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real estate needs tailor made solutions.

About us

As an independent investment firm, we focus on providing customised solutions to meet the financial requirements of our clients. The team consists of specialists with decades of experience and expertise from various positions held with international investment banks and law firms.

The combination of our corporate finance, capital markets and structuring expertise as well as our in-depth understanding of real estate fundamentals and clients’ needs allows us to deliver on what we promise.

Our passion for innovative solutions is the most precious asset to outperform the industry standard. We work hard to establish and maintain a high responsive and focused relationship with our business partners.


billion EUR

real estate financing track record

team members

to structure and arrange the most efficient financing solutions

competence areas

corporate finance, capital markets, structuring, institutional client coverage


We are an investment firm with the strong focus to serve our clients with excellence, innovation and team spirit.


Johannes Märklin

Managing Director

Johannes worked for 25 years in the German banking industry. He co-founded CORESTATE Bank, formerly Aggregate Financial Services.

Previously he was running Deutsche Bank’s Private Debt Syndicate business for its Corporate Finance and Debt Capital Markets division with teams in Frankfurt, London, Singapore and Tokyo. In his roles, Johannes developed the financing activities for international corporate clients, including real estate companies and financial institutions and expanded the distribution activities of capital market products to institutional investors across Europe and Asia. Johannes holds a German diploma in Business Administration and a MBA from University of Wales.

Johannes is married and has 4 children.

Sebastian Ernst

Managing Director

Sebastian has over 18 years financial services industry experience. He co-founded CORESTATE Bank, formerly Aggregate Financial Services, in 2018.

Previously Sebastian was a Managing Director and Global Head of Illiquid Credit Trading at Deutsche Bank. He was responsible for the underwriting and structuring of financing transactions and the trading of illiquid bonds and loans with a focus on corporate and real estate related credit risk.

He holds a Masters degree in Business Administration from the University of Passau. Sebastian is married and has 3 children.

Peter Kuhne

Managing Director

Peter Kuhne joined CORESTATE Bank, formerly Aggregate Financial Services, as Managing Director responsible for the back-, middle-office and control functions early 2020 and has nearly 20 years of work experience in the banking industry.

Before moving to CORESTATE Bank he worked as Business Manager / COO for various international Corporate Coverage teams at Deutsche Bank.

In this role Peter Kuhne was responsible for the management and control of the operational processes of up to 450 sales and coverage people.

He studied business administration at the Johann-Wolfgang-Goethe University in Frankfurt and the Università Cattolica del Sacro Cuore in Milan and graduated with a diploma.

Peter Kuhne is married and has four daughters.

Nadja Hoppe

Corporate Finance

Nadja has more than 8 years of corporate finance experience with a focus on debt advisory and real estate transactions. As Director in CORESTATE Bank's corporate finance team, she is responsible for advising clients on structuring and arranging financing solutions.

Prior to joining CORESTATE Bank, Nadja advised and executed corporate finance and restructuring transactions at NAI Apollo, PricewaterhouseCoopers and Deutsche Bank.

Nadja earned a German Diploma in Economics from the Leibniz University of Hanover.

Steffen Rapp

Institutional Clients

Steffen has more than 20 years experience in various roles and positions in the capital market sector. As Managing Director, he is responsible for the institutional clients coverage.

Prior to joining CORESTATE Bank, Steffen worked for Deutsche Bank and was there in several leading and specialist roles responsible for Capital Markets Risk Management Solutions especially for corporates in the EMEA region. The last years Steffen was active as a Managing Partner in building up a niche company in the construction sector. Additionally he helped especially start ups in fund raising rounds.

Steffen has a broad network of people active in a wide range of industries.

He is married and has 2 children.

Johannes Kaiser

Client Coverage

Johannes is responsible for institutional client coverage and in charge of new technologies and tools for CORESTATE Bank. Prior to joining CORESTATE Bank, Johannes worked for 10 years in the capital markets divisions of Deutsche Bank and Macquarie Group where he focused on the coverage of institutional and corporate clients. Preceding his career in the financial industry, Johannes was a professional cyclist.

Johannes completed his studies of Engineering and Economics and owns a diploma in Industrial Engineering from the Technical University of Ilmenau.

Timo Weikert

Institutional Sales

Timo has almost 20 years of professional experience in capital markets (fixed income) and institutional client coverage.

After 10+ years with JPMorgan as a sales person for asset managers, insurance companies, banks and central banks in the DACH and CEE region, he ran the interest rate products division for the German-speaking region at Santander UK in London. In the course of BREXIT, Timo moved back to Germany to work at NATIXIS CIB in the Derivatives / Multi-Asset Solutions and Real Asset Financing division, from where he accompanied various transactions with his current employer, CORESTATE Bank.

Timo holds a master’s degree in business administration from Johann Wolfgang Goethe University in Frankfurt with a focus on finance and international accounting and has volunteered for student initiatives for supplementary, practice-oriented trainings.

Michael Rützel

General Counsel

Michael heads the legal department of CORESTATE Bank. Before joining, he worked for 15 years with White & Case, Barclays Capital and Deutsche Bank in various capital markets, regulatory and structured finance teams where he focused on real estate financing and securitizations for banks and private equity companies.

Michael is admitted as a German lawyer and as a solicitor in England and Wales. He is a regular lecturer at the German Graduate School of Management and Law on Legal Tech and Project and Process Management and a speaker at industry events.

Matthias Sandfort

Banking Coverage

Matthias has more than 20 years experience in various roles and positions in the real estate market. As Managing Director, he is responsible for banking coverage.

Prior to joining CORESTATE Bank, Matthias worked for NATIXIS, Helaba and WestLB. During his 6 years as department head for international real estate restructuring (US, UK and European portfolios) at Helaba, he gained significant experiences in turnaround, restructuring and operational / performance improvement consulting. Previously, Matthias focussed on real estate lending in Central and Eastern Europe and as Head of Western Europe. Matthias is married and has 3 children.

Benjamin Uhde

Corporate Finance

Benjamin is Executive Director in CORESTATE Bank's corporate finance team and responsible for advising clients in real estate financing solutions. He has 13 years of corporate finance, capital markets and private equity experience where he worked as corporate finance advisor, real estate sector banker and as senior financial analyst for a publicly listed real estate company.

His transactional experience comprises of equity and debt capital markets transactions, private equity and debt, structuring, arranging and placement of senior and junior loans for developments as well as real estate portfolio in Germany, Austria, Switzerland, the Nordics and South East Europe. Benjamin has graduated with Master of Arts in Finance. He is fluent in German, English, French, Italian and Spanish. Benjamin is married and has 2 children.

Martin Bielefeld


Martin has joined CORESTATE Bank in 2019. He is responsible for structuring financial solutions. He previously worked for Deutsche Bank’s Private Debt Syndicate. Before joining Deutsche Bank in 2006, Martin has worked for Morgan Stanley in London and Clifford Chance in Frankfurt and London. Martin is a qualified lawyer in Germany and a solicitor of England and Wales.

Till Wenke

Corporate Finance

Till has 12 years of real estate finance experience.

Prior to joining CORESTATE Bank, he worked for Eurohypo and Hamburg Commercial Bank in various roles. He has significant experience in structuring of financial solutions, debt capital markets and distressed debt.

His transaction experience comprises of structuring of development financings, customised investment loans, international restructurings, arranging of promissory note loans and securitisations.

Till holds a diploma in Business Administration and has two children.

Christian Kummer

Client Coverage

Christian Kummer is employed as an Associate. He supports the team in all lines of business. Before he joined CORESTATE Bank he worked for a project and property development company and as an advisor for commercial real estate financing.

Christian Kummer holds a Masters degree in Business Administration – Banking & Finance.

Raphael Pasiek


Raphael has joined CORESTATE Bank in 2020. He is responsible for product development and structuring. He previously worked for Société Générale’s Legal Department in Frankfurt.

Before joining Société Générale in 2015, Raphael has worked for Morgan Stanley, The Royal Bank of Scotland, Barclays in London, Landesbank Berlin in Berlin, UniCredit in Munich as well as Clifford Chance in Frankfurt and London, SJ Berwin in Berlin and Frankfurt, Dewey & LeBoeuf in Frankfurt and King & Wood Mallesons in Frankfurt.

Raphael is a qualified lawyer in Germany.

Thomas Waldhart-Knopp


In the Spring of 2020 Thomas Waldhart-Knopp joined CORESTATE Bank as Compliance officer. He has more that 20 years of work experience in the financial industry.

Before moving to CORESTATE Bank he worked as Head of Regulatory Compliance for Morgan Stanley Europe SE. Prior to this Thomas worked in various regulatory and regulatory change related positions at Deutsche Bank.
In this roles Thomas was inter alia responsible for the implementation of effective procedures for complying with the legal rules and regulations.

He studied business administration at the University of Applied Sciences Berlin and HELIA Helsinki Business Polytechnic in Helsinki and graduated with a diploma (FH).

Thomas Waldhart-Knopp is married.

Anastasiia Sereda


Anastasiia joined CORESTATE Bank at the beginning of 2021. She supports the team in compliance. Previously, she worked at a banking institution with a focus on banking and securities law along with anti-money laundering.

She is studying business law at the Frankfurt University of Applied Sciences.

Dirk Giessamer

Technology & Operations

Dirk joined CORESTATE Bank as Head of Technology & Operations at the beginning of 2020. He has more than 15 years of experience in the IT sector and the financial industry, founding his first Web-Agency back in 1998.

Before moving to CORESTATE Bank he worked in several positions at Deutsche Bank, starting in Group Technology & Operations to latest being the responsible COO for the Financing & Solutions Group in the D/A/CH region of the Corporate Bank division.

Dirk studied at the Frankfurt School of Finance & Management and Victoria University of Wellington New Zealand and holds a Master degree in Banking.

Dirk is married and has two children.

Marcus Rietsch

Digital Client Platforms

Marcus joined CORESTATE Bank at the beginning of 2021 as Head of Digital Client Platforms. His responsibility is broadening and digitizing the sales channels.

Before joining CORESTATE Bank, Marcus worked in the corporate banking division of Deutsche Bank for 12 years where he focused on digital client solutions, such as external and internal electronic trading & advisory solutions, system mergers and MiFID II compliance.

He studied in England, Germany, Switzerland and Australia from where he holds degrees in International Business (B.A.), Business Informatics (B.Sc.) and Finance & Capital Markets (M.Sc.).

Farid Najem

Risk Manager

Farid Najem joined CORESTATE Bank in 2021 as Risk Manager responsible for overseeing matters related to risk and regulatory.

He has more than 13 years of experience in the banking sector. Before joining CORESTATE Bank, he worked for PwC as well as consulting firms in the banking and savings bank sector in the area of risk management. In this capacity, Farid was responsible for the identification, assessment, management, monitoring and communication of risks.

Farid holds a degree in Business Mathematics from University of Hamburg. Outside of work, he is a family man, married and has two children.

Elif Sarisoy

Financial Accounting

Elif Sarisoy is responsible for all aspects of implemention, processing and accounting processes mapping in the financial department. Her responsibilities include management financial reporting and the preparation of monthly and annual financial statements in accordance with the accounting standards of the German Commercial Code (HGB) and the German Ordinance on Accounting for Banks (RechKredV). In this function, she supports the risk department in certain aspects.

Elif is a proven expert in the areas of accounting and taxes. She has acquired her broad expertise in various functions in tax consulting companies.

In the last 10 years, she has gained her professional expertise and experience in positions in Mainz, Wiesbaden, Frankfurt and New York (USA). She is a tax specialist and studied in Mainz and New York. She is currently in the preparation phase for the tax advisory exam.

Nicholette Fung

Office Manager