senior at an undergrad B-school with a T2 offer in NYC starting Jan 2025 or later. After traveling this summer, what professional opportunities are available for recent grads like me?

Your proactive approach to advancing your professional profile during this interim period is commendable. Here are several opportunities worth exploring:

Internships:

1. Consulting Firms: Many top consulting firms offer internship programs specifically designed for individuals with secured full-time offers. These internships, ranging from a few weeks to several months, provide exposure to the consulting industry and help develop problem-solving, analytical, and client-facing skills.
2. Investment Banking/Private Equity: Though competitive, securing an internship in these fields is possible. Leverage your university’s career services center or alumni network to find opportunities. Even short-term internships can enhance your resume and open doors for future roles.
3. Corporate Finance/FP&A: Large corporations often have internship programs in their finance departments, including Financial Planning and Analysis (FP&A) roles. These internships offer insights into corporate finance operations and provide hands-on experience in financial modeling, analysis, and strategic decision-making.
4. Venture Capital/Startups: If you’re interested in entrepreneurship, reach out to local venture capital firms or startups. These organizations may offer short-term internships, providing exposure to the dynamic world of venture capital and startup operations.

Volunteering or Non-Profit Work: Consider volunteering for causes you're passionate about. This not only contributes meaningfully to society but also strengthens your MBA application. Seek roles that allow you to take on significant responsibilities and demonstrate leadership skills.

MBA Preparation:

• GMAT: Studying for the GMAT is a wise move, showcasing your commitment to higher education and potentially enhancing your business school applications.
• Networking: Attend MBA fairs, networking events, or information sessions to gain insights into the application process and build relationships with admissions representatives.

Additional Tips:

• Approach each opportunity with a genuine desire to learn, contribute, and grow. Treat internships or volunteer roles with the dedication and professionalism of full-time positions to make a lasting impact.
• Seek guidance from your university’s career services center, alumni network, or professional mentors. They can provide valuable insights, connections, and support as you navigate this transitional period.

By pursuing these opportunities with dedication, you’ll enhance your professional profile and demonstrate your commitment to personal and professional growth.

I see Gaurav already provided plenty of options to consider. 

One other thing to consider is that since you have this job starting next year (I assume it's full time), then you can also use the time in between to explore your development in a more alternative way. 

It could mean travelling, pursuing some other hobbies or interests, or developing your knowledge within a specific (topic). 

Doing yet another internship won't realistically do much for your career development, especially since you're not planning on sticking with that firm. 

Best,

Cristian

Volunteering and non-profit work would be better than the GMAT in this case.