
After successful Big 4 careers advising some of the largest industry players and working on some of the largest and most complex transactions, Robert Tinnell and Christopher Orbell founded Tall Oaks Partners to prioritize their passion for advising clients and delivering thoughtful services and quality work product.

Our firm's structure enables us to forge close, meaningful relationships with our clients and move quickly on deliverables by minimizing operational inefficiencies.
Deep technical and industry experience
The team members working for you have extensive experience advising clients on complex financial and industry issues.
Collaborative engagements
We bring a flexible and accommodating approach to our client engagements. Our process is centered around collaboration with our clients, frequent and responsive communication, and our team’s experience delivering advisory services.
Commitment to our clients
Our firm is built on developing long-standing relationships with our clients, large and small. Our clients are our top priority and we make ourselves available to you as needs arise.
Meet the team
Our team has significant experience delivering services to clients across multiple industries and sectors. We tailor our services and deliverables to meet client needs and prevailing industry and economic trends.
Managing Partners

Robert Tinnell, CFA

Christopher Orbell
Senior Team Members

Ashima Singh

Savika Tayal

Arjit Singh

Ayushi Agarwal

Sanchi Agarwal

Sanskar Maheshwari
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Christy Mulroy
Meet the team
Our team has significant experience delivering services to clients across multiple industries and sectors. We tailor our services and deliverables to meet client needs and prevailing industry and economic trends.
Managing Partners

Robert Tinnell, CFA

Christopher Orbell
Senior Team Members

Ashima Singh

Savika Tayal

Arjit Singh

Ayushi Agarwal

Sanchi Agarwal

Sanskar Maheshwari
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Christy Mulroy

Sanskar Maheshwari
Senior Associate
Sanskar has over six years of experience providing advisory and valuation services. Prior to joining Tall Oaks Partners, he worked at Deloitte and Ernst & Young in roles in the accounting advisory and valuation practices.
The majority of Sanskar’s assignments relate to assisting private and public participants across multiple industries and sectors. Specific industries and sectors served include energy and resources, transportation and logistics, and industrial services and manufacturing.
His assignments include valuation studies, impairment analyses, purchase price allocations, valuation of debt, valuation of stock options, discount and premium studies, and financial modelling projects. Sanskar has primarily worked on transaction advisory and valuation assignments for financial reporting and tax compliance purposes.
Education
Christ University, Bangalore, Bachelor of Business Administration (BBA), Accountancy and Finance
Professional Affiliations
Chartered Financial Analyst (CFA)
Member, CFA Institute
Member, Association of Chartered Certified Accountants (ACCA), UK

Sanchi Agarwal
Senior Associate
Prior to working with Tall Oaks Partners, Sanchi spent over three years working with the U.S. tax advisory services group of Ernst & Young, within their private high net worth service department.
The majority of Sanchi’s assignments relate to assisting private and public participants in the energy and resources and consumer products and service sectors.
Her assignments include valuation studies, impairment analyses, purchase price allocations, and discount and premium studies. Sanchi has primarily worked on transaction advisory and valuation assignments for financial reporting and tax compliance purposes. Sanchi also assists with the preparation of quarterly investment valuations for certain private equity clients of the firm.
Education
University of Delhi, Bachelor’s Degree, B. Com (H)
Professional Affiliations

Ayushi Agarwal
Senior Associate
Ayushi has over four years of business valuation experience between her roles with Tall Oaks Partners, Deloitte, KPMG, and Ernst and Young.
The majority of Ayushi’s assignments relate to assisting private and public participants in the energy and resources, consumer products and services, transportation and logistics, and media and entertainment industries.
Her assignments include valuation studies, impairment analyses, purchase price allocations, the valuation of debt and equity instruments, discount and premium studies, and financial modeling. In her role with Tall Oaks Partners, Ayushi also assists with the preparation of quarterly investment valuations for certain private equity clients of the firm.
Education
University of Delhi, Master of Business Administration (MBA)
APJ Abdul Kalam University, Bachelor’s Degree, Computer Science Engineering
Professional Affiliations

Arjit Singh
Senior Associate
Arjit joined the Tall Oaks Partner’s team in 2024 upon completion of his Master of Business Administration (MBA). Prior to working with Tall Oaks Partners, Arjit spent over seven years working with the Planning and Control department of Indian infrastructure conglomerate, Larsen and Toubro.
The majority of Arjit's assignments with Tall Oaks Partners relate to assisting private and public participants in the energy and resources, media and entertainment, and consumer products and services sectors.
Financial reporting and tax compliance projects he has held meaningful roles on include legal entity valuation studies, purchase price allocations, impairment analyses, discount and premium studies, and financial statement analyses for financial reporting and tax compliance purposes. Arjit also assists with the preparation of quarterly investment valuations for certain private equity clients of the firm.
Education
Indian School of Business, Master of Business Administration (MBA)
Indian Institute of Technology, Delhi, Master’s Degree, Construction Technology and Management
Manipal Institute of Technology, Bachelor’s Degree, Mechanical Engineering
Professional Affiliations
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Christy Mulroy
Office Manager
Christy has been an office manager for Tall Oaks Partners for over 4 years. Prior to joining Tall Oaks Partners, Christy worked as a social worker, before transitioning into several part-time roles with local businesses and non-profit organizations. As a full-time social worker Christy specialized in mental health services for children and families and child welfare before stepping away from her career to focus on her family and three young children. Upon returning to work, her professional roles have included warehouse and inventory management, social media marketing, and preparing home study material for a Houston-based foster care and adoption agency.
Christy’s office manager role with Tall Oaks Partners involves the management of accounts receivable and payable, personnel administration, social media and marketing activities, and other general office and organization management related tasks.
Education
The University of Texas at Austin, Master of Science in Social Work
The University of Texas at Austin, Bachelor of Science in Social Work
Professional Affiliations

Savika Tayal
Manager
Prior to working with Tall Oaks Partners, Savika spent over six years working with the financial modeling and valuation practices of Ernst & Young and Deloitte. Together Savika has over 10 years of financial modeling and valuation experience.
The majority of Savika’s assignments relate to assisting private and public participants in the energy and resources, engineering and construction, technology and telecommunications, and transportation and logistics industries. Savika has considerable experience providing modeling advisory services, specifically as relates to the design, build, and audit of project finance and tax equity financial models. She also has experience valuing businesses, intangible assets, and financial securities for financing, restructuring and reorganization, management planning, tax, and financial reporting purposes.
Education
Indraprastha University, Master of Business Administration (MBA), Finance
Delhi University, Bachelor’s Degree (B. Com (H))
Professional Affiliations

Ashima Singh
Associate Director
Prior to working with Tall Oaks Partners, Ashima spent over six years working with the valuation and financial modeling practices of Deloitte and KPMG. She brings over ten years of valuation and modeling advisory experience to the Tall Oaks Partners team.
The majority of Ashima’s assignments relate to assisting private and public participants across multiple industries and sectors. Specific industries and sectors served, include energy and resources, media and entertainment, transportation and logistics, life sciences, chemicals and specialty materials, and consumer products and services.
Her assignments include valuation studies, impairment analyses, purchase price allocations, valuation of stock options, discount and premium studies, and financial modeling projects. Ashima has primarily worked on transaction advisory and valuation assignments for financial reporting and tax compliance purposes. Ashima has also cleared level 2 of the Chartered Financial Analyst (CFA) exam.
Education
Symbiosis International University, Master of Business Administration (MBA)
Manipal Institute of Technology, Bachelor’s Degree, Electrical and Electronics Engineering
Professional Affiliations

Christopher Orbell
Managing Partner
Christopher has over ten years of business valuation experience between his time with Tall Oaks Partners and Deloitte.
The majority of Christopher’s assignments relate to assisting private and public participants in the energy and resources, media and entertainment, consumer products and services, technology and telecommunications, and transportation and logistics industries.
Advisory services he provides to his clients include the valuation of businesses, intangible assets, and financial securities for financing, restructuring and reorganization, management planning, and financial reporting purposes. Over the years Christopher has also focused on serving private equity clients, working with certain of the larger, more successful firms in the U.S. to prepare and review quarterly investment valuations.
Education
IE Business School, Master of Business Administration (MBA)
Northeastern University, Bachelor’s Degree, Civil Engineering
Professional Affiliations
Member, American Society of Appraisers

Robert Tinnell, CFA
Managing Partner
Robert has over fifteen years of advisory and valuation experience between his time with Deloitte and Tall Oaks Partners. Robert advises public and private clients on a myriad of financial and technical matters across multiple industries and sectors.
Specific industries and segments he serves include industrial services, energy and resources, media and entertainment, transportation and logistics, consumer products and services, chemicals and specialty products, and engineering and construction. He has worked on some of the largest and most complex M&A transactions and bankruptcies across multiple industries. His assignments include valuation studies, impairment analyses, purchase price allocations, the valuation of debt and equity instruments, discount and premium studies, board advisory, and financial modeling.
Robert has served as an expert witness regarding valuation matters related to oil and gas assets and has also been a guest speaker at numerous universities and conferences on topics related to business valuation and the oil and gas industry.
Education
Rice University, Master of Business Administration (MBA), Finance
The University of Texas at Austin, Bachelor of Business Administration (BBA), Management and Finance
Professional Affiliations
Chartered Financial Analyst (CFA)
Member, Houston Business and Estate Planning Council
Executive Board Member and Chair, Family Houston (Houston-based non-profit)