Our Story & Services

We are an experienced team of financial advisors providing sophisticated counsel and streamlined solutions to a select group of individuals, families and businesses.  

We are highly analytic and very detail-oriented. You can rely on our in-depth knowledge of investments, estate planning strategies, retirement, tax issues, and risk management to provide you with a comprehensive wealth strategy that integrates investment decisions with your financial needs, your desired aspirations and your deeply held personal values. 

Our consultative, team approach focuses on establishing and fostering close, long-term relationships with you, the other members of your family and your other professional advisors. While we bring complementary skills and perspectives, we also share a commitment to pursuing your goals and dreams with the same vigor as we do our own. This approach not only provides you with access to a broad array of solutions, but it also helps to ensure that you benefit from the highest levels of service. We are committed to creating an alliance of trust with you by delivering service, communication and care that aims to exceed your highest expectations
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Our client-centered process begins with listening. The better we understand your financial needs, your long-term goals and expectations, as well as your fears and challenges, the better we can customize a sound investment strategy for you. We don’t make assumptions; instead, we listen carefully to your answers when we ask quantitative and qualitative questions such as:

How did you feel when the market went down last year?
What are three things you would like to do to for your family to ensure their security for the future?
What do you wish you could spend more time doing now?
Next, we do a very detailed and thorough analysis of your answers to structure a wealth plan that is uniquely your own. When we talk with you again, it’s with the goal of helping you understand your choices. We believe it’s our job to unravel the complexities of your financial circumstances and offer simplified strategies that nonetheless take advantage of sophisticated global markets. Keeping your goals in mind, we leverage Morgan Stanley’s best thinking to select investment solutions to comprise your portfolio.

From then on, our job is to expect and react to change – to changes in your life as well as to changes in the financial markets. Just as no bull market or bear market is permanent, your life can take unexpected dips and curves. Our staff makes sure that we’re in contact as often as you desire, to continue listening to and ensure that your plan remains aligned with your evolving life and objectives.
    We make a habit of attending to all the details of your financial life. We believe in diversification and in investment strategies that are characterized by their simplicity, rather than simple solutions.

    The fact is there is no one kind of investment that is always best. In investment portfolios, as in much else, there is safety in numbers.  

    A clear investment process, combined with years of experience, leads to good investment decisions. To that end, we have crafted highly detailed systems to ensure you receive high-quality and consistent service. We provide:

    Personalized investment objectives based on your individual investment goals
    Customized asset allocation around your objectives, including taxes and risk adjusted returns
    Ongoing review and rebalancing to ensure your portfolio stays within your allocation parameters
    Constant communication through quarterly reports and regularly scheduled meetings
      One of the issues we tackle when a family has significant assets is how to preserve it for future generations. This can be a surprisingly difficult task. Effective multigenerational wealth management requires a family to tackle the personal issues that determine who should benefit from the wealth, the tax hurdles that stand in the way of its efficient transfer, and the capital markets uncertainties that make it challenging to invest it prudently.

      Our multigenerational planning addresses:

      The amount of funds that the senior generation must retain to meet their lifestyle needs
      The excess capital they have available to give during their lifetimes to descendants or philanthropic causes without jeopardizing their financial security
      A method for optimizing among the array of wealth transfer strategies to determine how best to move the wealth to the desired beneficiaries, at the right time and in the right proportions
      The appropriate pace of lifetime wealth transfer
      A framework for monitoring and revisiting the plan, as markets, tax laws, and family circumstances change

      We understand how to help clients preserve relationships and hold onto assets when they pass among generations of a family. We are skilled at initiating and moving cross-generational financial dialogues forward and helping families create a foundation for passing not just wealth but values from one generation to the next.
        Tracey enjoys assisting clients of the Mahnken Tambone Group with the myriad transactional needs that arise on a daily basis. She provides prompt, courteous and reliable care in all areas of administrative and logistical support. As a Registered Associate, Tracey enjoys delivering first-class customer service with each interaction. Tracey holds Series 7 & Series 63 licenses.

        Tracey has been working in the financial services industry since 1982, when she worked as a Trading Assistant for Credit Suisse while getting her undergraduate degree in Business Management from Binghamton University. She went onto graduate school immediately and, for the next four years, she worked on the floor of the New York Stock Exchange by day while earning her MBA from Fordham University at night. Tracey has worked in Morgan Stanley’s retail side since 2005, assisting Financial Advisors and their clients with a diverse array of responsibilities.

        She is married and has two children.


          58 South Service Rd
          Ste 400
          Melville, NY 11747
          (631) 755-8800(631) 755-8800

          Meet The Mahnken Tambone Group

          Photo of Glen Mahnken

          Glen Mahnken

          First Vice President, Wealth Management, Financial Advisor, First Vice President - Investments

          (631) 755-8845(631) 755-8845

          About Me

          Risk and volatility are not the same. The biggest risk of the stock market is not being in the market.


          Glen Mahnken, CRPC® has been helping to meet the needs of individual investors, business owners and their families since 1995. He takes a very organized and systematic approach to working with his clients, and believes strongly in the importance of educating his clients to have a good understanding of their investment portfolios, particularly in relationship to market conditions.


          Glen is a Chartered Retirement Planning CounselorSM. The CRPC® designation is arguably the nation’s premier retirement planning credential. Individuals who hold the CRPC® designation have completed a course of study encompassing pre-and post-retirement needs, asset management, estate planning and the entire retirement planning process using models and techniques from real client situations.


          Glen earned his bachelor’s degree of Chemical Engineering from Manhattan College in 1986. He worked as a field engineer for Amerada Hess for eight years, covering the construction and maintenance operations for retail petroleum outlets throughout a very large geographical territory. In 1995, Glen became a Financial Advisor with a regional brokerage firm specializing in tax-free bonds. He joined Merrill Lynch in 1997 and moved to Morgan Stanley in 2016.


          Outside of work, Glen is and officer and the Secretary of the Suffolk Estate Planning Council and a member of the Nassau chapter of the New Canaan Society.
          Securities Agent: TX, TN, SC, RI, PA, NY, NJ, NH, NC, MD, MA, IL, GA, FL, CT, CA, AZ; Managed Futures; General Securities Representative; Investment Advisor Representative
          NMLS#: 580021

          About Me

          It’s our job to thoroughly understand the unique shape of each client’s financial situation


          As a CERTIFIED FINANCIAL PLANNERä (CFP®) and Financial Advisor, Steve Tambone brings a unique breadth and depth of industry knowledge and experience to serve the financial needs of individuals, families and small business owners. He consults with clients on financial matters that encompass both sides of the balance sheet, providing solutions for cash management and liquidity access issues, as well as the entire range of traditional portfolio management. He also works closely with the outside attorneys and accountants of his clients to ensure coordination of estate planning, investments and taxes. 


          Steve earned the significant industry designation of CFP® in 2016 after undergoing a rigorous accreditation process. The CFP® certification mark requires CFP® professionals to act in their clients’ best interests above their own, using in-depth knowledge of issues such as the financial planning process, tax planning, employee benefits and retirement planning, estate planning, investment management and insurance.


          Steve entered the financial services industry with Merrill Lynch after earning a bachelor’s degree in Business Administration from St. Joseph’s College in 2008. He began collaborating with Glen Mahnken after graduation and they formed an official partnership in 2014.  During this time, Steve pursued and earned an MBA degree in Personal Financial Planning from Molloy College. In 2016, the Mahnken Tambone Group moved to Morgan Stanley.


          Outside of work, Steve has been an active mentor with Big Brothers Big Sisters of Long Island for over 6 years. He is also a board member of the Suffolk County Estate Planning Council.
          Securities Agent: TX, CT, TN, SC, RI, PA, NY, NJ, NH, NC, MD, MA, IL, GA, FL, CA, AZ; General Securities Representative; Investment Advisor Representative
          NMLS#: 1189818

          About Me

          Tracey enjoys assisting clients of the Mahnken Tambone Group with the myriad transactional needs that arise on a daily basis. She provides prompt, courteous and reliable care in all areas of administrative and logistical support. As a Registered Associate, Tracey enjoys delivering first-class customer service with each interaction. Tracey holds Series 7 & Series 63 licenses.


          Tracey received a BS in Business Management from Binghamton University in 1986. She began work in the financial services industry on the floor of the New York Stock Exchange, as a Trading Assistant for Credit Suisse, and Goldman Sachs, while concurrently attending graduate school, earning an MBA in Finance from Fordham University. Since 2005, Tracey has worked at Merrill Lynch and Morgan Stanley, assisting Financial Advisors and clients with a diverse array of responsibilities.


          Tracey is a member of the International Professional Business Fraternity of Delta Sigma Pi, volunteers at Make-A-Wish, and Ronald McDonald House.
          Investment and Market Perspectives

          On the Markets


          Working with you to understand your life goals and develop a personalized wealth strategy. Today and for the years to come.
          • 401(k) Rollovers
          • IRA Plans
          • Retirement Income Strategies
          • Retirement Plan Participants
          • Annuities
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          Working closely with you to guide your wealth and investments through the most challenging market cycles.
          • Asset Management
          • Wealth Planning
          • Traditional Investments
          • Alternative Investments
          • Impact Investing
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          Creating customized financial strategies for the challenges that today's families face.
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          • 529 Plans / Education Savings Planning
          • Long Term Care Insurance
          • Special Needs Planning
          • Trust Services
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          Business Planning

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          • Retirement Plan Sponsors
          • Qualified Retirement Plans
          • Corporate Pension Funds
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          Making sure your philanthropic dollars are managed with the same high quality service as the rest of your wealth.
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          • Foundations
          • Donor Advised Funds
          • Impact Investing
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