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David Mangini Email & Phone Number

Investment Manager Services, SMA Trading at SEI
Location: Greater Philadelphia, United States 6 work roles 1 school
1 work email found @seic.com LinkedIn matched
✓ Verified Jul 2026 4 data sources Profile completeness 86%

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Current company
SEI
Role
Investment Manager Services, SMA Trading
Location
Greater Philadelphia, United States
Company size

Who is David Mangini? Overview

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Quick answer

David Mangini is listed as Investment Manager Services, SMA Trading at SEI, a with 3250 employees, based in Greater Philadelphia, United States. AeroLeads shows a work email signal at seic.com and a matched LinkedIn profile for David Mangini.

David Mangini previously worked as Trader, SMA Trading at Sei and Trader, Investment Operations and Trading at Coho Partners, Ltd.. David Mangini holds Bachelor'S Degree, Finance & Management Information Systems from Villanova University.

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Email format at SEI

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{first_initial}{last}@seic.com
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Profile bio

About David Mangini

Experienced Trader and Investment Operations Professional with a demonstrated history of working in the financial services and asset management industry. Detail-oriented, adaptable, and analytical with ability to learn quickly and problem solve. Knowledgeable in company structure, investment offerings, procedure creation, and invested in mentoring team members and training new staff to promote their success.Project Management | Communications | Administration | Problem Resolution | Market Research | Cross-Functional Team Collaboration | Investment Operations and Trading | Excel Macros and Pivot Tables | Mentoring & Education | Trade Cost Analysis | Risk Identification | Trend Identification | Trade Desk Management

Current workplace

David Mangini's current company

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SEI
Sei
Investment Manager Services, SMA Trading
oaks, pennsylvania, united states
Website
Employees
3250
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6 roles · 20 years

David Mangini work experience

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Trader, Sma Trading

Current
Sei

Oaks, Pennsylvania, United States

Jan 2022 - Present

Trader, Investment Operations And Trading

Coho Partners, Ltd.

Berwyn, Pa

Rebalanced and executed equity, mutual fund, FX, and fixed income trades for Institutional, SMA, and High Net Worth accounts across various platforms, including new accounts, cash flows, tax harvest requests, and account liquidations.Built and executed block trades across multiple strategies and trading systems, striving for best execution by diligently monitoring price, volume, and market movement.Performed model delivery updates and checks for 20 relationships, including comprehensive corporate action review to avoid trade errors.Ran and reviewed cash, security, and model platform drift reports and monitor client restrictions to quickly address any potential issues.Oversaw trade desk in head trader’s absence, including TCA, commission monitoring, and communicating real-time news and activity of companies and sectors in portfolios.Managed trade settlement process migration to Omgeo Oasys / CTM, ALERT, and TradeSuite systems resulting in a more automated trade settlement workflow.Documented operational and trading procedures and provided ongoing updates to maintain smooth operations.Performed operational duties including proxy voting, class actions, trade settlements, and quarter-end mutual fund and account-level flow reporting for client service teams to communicate with clients.

Mar 2018 - Jan 2022

Avp, Portfolio Administration, Trade Error Supervisor

Berwyn, Pa

Analyzed and processed complex Envestnet and non-Envestnet caused trade errors that required escalation.Ensured trade error corrections and analysis were completed accurately and promptly, as designated by the Service Level Agreement.Updated trade error processing guidelines, procedures, contact lists, and custodian policies to preserve continuity.Revamped firm-wide trade error review and reporting to better identify trends and assist in resolution implementation.Responsible for performance appraisal process on a semi-annual basis, monitoring analyst’s progress, and providing constructive feedback and mentoring. Organized regular team and individual meetings as needed.

Dec 2016 - Mar 2018

Senior Portfolio Administrator

Greater Philadelphia Area

Rebalanced equity accounts across various sponsor relationships for cash flow, liquidations, new account investment, and tax harvest requests, based on established portfolio model weightings.Constructed weekly security drift reports, researched any issues, and traded accounts accordingly to remain in line with respective models.Monitored market volatility, especially when trading static models to avoid overdrafts.Built and maintained relationships with custodians, operational contacts, and sell-side traders resulting in prompt response times and comprehensive communication.Allocated fixed income and equity trades that were stepped out with third-party executing brokers.Researched and resolved settlement issues for equity and fixed income SMAs to ensure timeliness of trade settlement and avoid potential buy-in situations.Processed claims and SPO charges from mortgage-backed security factor updates.Developed reports and macros to increase efficiencies of daily operations.Implemented trade error processes, including correction analysis, formal error procedure documentation, and quarterly reports. Created and applied solutions for future trade error prevention which helped reduce monthly error occurrences by 80-90%.Interviewed, selected, trained, and supervised Drexel University Co-ops every six months; formalized and documented training program, creating seamless transitions.Facilitated performance evaluations of each Drexel Co-op with a focus on future career path & growth.Designed intradepartmental SharePoint website for quick access to SMA trading and trade settlement procedures and contact lists.

2007 - Dec 2016

Trade Analyst I & Ii

Greater Philadelphia Area

Researched and resolved all equity trade discrepancies and settlement issues on T+1.Retrieved trade confirmations from Depository Trust Company and compared to internal APL system.Assisted in automating trade affirmation process for custodian accounts using Omgeo Trade Match.

Sep 2005 - 2007

Proprietary Equity Trader

Greater New York City Area

Specialized in short-term & intraday trading of NASDAQ and NYSE equities; specifically concentrated on stocks with significant momentum, volatility, and program trading.Utilized technical and fundamental analysis in order to choose valuable entry and exit points.

Mar 2004 - Sep 2005
Team & coworkers

Colleagues at SEI

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1 education record

David Mangini education

FAQ

Frequently asked questions about David Mangini

Quick answers generated from the profile data available on this page.

What company does David Mangini work for?

David Mangini works for SEI.

What is David Mangini's role at SEI?

David Mangini is listed as Investment Manager Services, SMA Trading at SEI.

What is David Mangini's email address?

AeroLeads has found 1 work email signal at @seic.com for David Mangini at SEI.

Where is David Mangini based?

David Mangini is based in Greater Philadelphia, United States while working with SEI.

What companies has David Mangini worked for?

David Mangini has worked for Sei, Coho Partners, Ltd., Envestnet, Inc, Delaware Investments, and Trillium Trading, Llc.

Who are David Mangini's colleagues at SEI?

David Mangini's colleagues at SEI include Jose Montes, Ryan Frost, Pmp, Marc Dubach, Francesco Gallo, and William Timmann.

How can I contact David Mangini?

You can use AeroLeads to view verified contact signals for David Mangini at SEI, including work email, phone, and LinkedIn data when available.

What schools did David Mangini attend?

David Mangini holds Bachelor'S Degree, Finance & Management Information Systems from Villanova University.

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