Mack Miessner
Partner | Government Contracting & Public Sector
Full profile available on request.
About
Built by Operators. Driven by Results.
Velocity Operating Partners is a team of executives who have run the plant, carried the P&L and answered to the board — now doing that work alongside leadership teams and investors.
Mission
Make operations the advantage, not the obstacle.
We exist to turn operating intent into operating result — with senior people in the seat, accountable to the number.
Philosophy
Fewer slides. More movement.
Go see
Judgment comes from the floor, the dock and the data.
Own the number
Success is a measurable change in the operating result.
Build the bench
The gain has to survive our departure.
Simplicity wins
Few initiatives, finished completely.
Leadership
Leadership & Advisory Team
Velocity Operating Partners combines experienced operating leadership with specialized expertise to help organizations improve performance, execute transformation, pursue growth opportunities, and build scalable businesses.
Bret Summers
Founder & Operating Partner
bret@velocityoperatingpartners.comBret Summers is a senior operations executive, entrepreneur, and business builder with extensive experience leading complex manufacturing, distribution, logistics, healthcare, and multi-site organizations. His career includes responsibility for operations generating more than $400 million in annual revenue, large-scale P&L and budget management, and facilities exceeding 2 million square feet.
His leadership experience includes General Motors and Lineage Logistics, where he has led large workforces, major distribution operations, operational turnarounds, Lean transformations, supply chain initiatives, labor relations, and organizational change. At General Motors, Bret helped transform an underperforming operation into a top-performing organization and led a Lean transformation that delivered a 49% improvement in productivity.
At Lineage Logistics, Bret helped create a showcase facility and operating process designed to support the company's transition from private equity ownership to the public markets. As part of that effort, he presented the operation and its capabilities to major institutional investment firms, including BlackRock, Fidelity, Morgan Stanley, State Street Global Advisors, and Vanguard, as the company prepared for what became the largest Nasdaq IPO of 2024.
In addition to his corporate leadership experience, Bret has founded and developed startup ventures spanning telehealth, health and wellness, peptides, e-commerce, and technology enabled businesses. This gives him experience across the business lifecycle, from building early stage companies with limited resources to leading sophisticated operations at scale.
Bret holds an MBA from the University of Michigan with a concentration in Lean Manufacturing. His approach combines executive level strategy with hands on execution, focusing on measurable performance, accountability, scalable operating systems, and sustainable growth.
He founded Velocity Operating Partners to provide owners, CEOs, investors, and leadership teams with experienced operating leadership to accelerate performance, navigate growth, and build stronger, more scalable businesses.
$400M+
Annual Revenue Responsibility
2M+ Sq. Ft.
Large-Scale Operations
500+
Workforce Leadership
49%
Productivity Improvement
Partners & Advisors
Ready to discuss your operating priorities?
The bench
A bench of operators, growing deliberately.
We add partners only where we can carry accountability. Seats below are actively being filled.
Operating Partner
Manufacturing & Supply Chain
Seat reserved for a senior operating partner leading plant performance, network design and supply chain programs.
- Plant performance
- Network design
Operating Partner
Healthcare Operations
Seat reserved for a healthcare operations leader covering throughput, labor models and service line performance.
- Patient flow
- Labor models
Operating Partner
Technology & AI Integration
Seat reserved for a leader deploying automation and AI where it moves margin, measured in payback.
- Automation
- Data foundations
How we work
From diagnosis to durable result.
01
Diagnose
Facts, constraints and the size of the prize. Two to four weeks.
02
Design
A short, sequenced plan with owners, timing and financial impact.
03
Execute
Embedded leadership, weekly cadence, a visible scoreboard.
04
Sustain
Systems, standards and leaders in place to hold the gain.
Values
What we hold to, engagement after engagement.
Candor
We say the hard thing early, in the room.
Accountability
We carry the number with you, not beside you.
Respect for the frontline
The answer usually already exists in the building.
Pace
Movement in weeks, not quarters of study.
Judgment
Experience applied, not frameworks applied.
Partnership
We measure ourselves on what remains after we leave.
Next step
Tell us the number you need to move.
A 30-minute conversation is usually enough to know whether we are the right operators for the problem in front of you.